"use client";

import Link from "next/link";
import {
  startTransition,
  useDeferredValue,
  useEffect,
  useMemo,
  useRef,
  useState,
  type ChangeEvent,
  type ComponentProps,
  type DragEvent,
  type ReactNode,
} from "react";
import useSWR from "swr";
import { toast } from "sonner";
import { motion, AnimatePresence } from "framer-motion";
import {
  ArrowDown,
  ArrowLeft,
  ArrowUp,
  ChevronDown,
  ChevronRight,
  ClipboardPaste,
  Copy,
  Download,
  GripVertical,
  Image as ImageIcon,
  Layers,
  Loader2,
  MonitorPlay,
  Package,
  Plus,
  Save,
  Search,
  Settings2,
  Sparkles,
  Trash2,
  Upload,
  UserCircle,
  Video,
} from "lucide-react";
import {
  AGENT_WORKFLOW_PROMPT_FRAGMENT_MAX_LENGTH,
  defaultAgentWorkflowConstraintSettings,
  defaultAgentWorkflowPageFeatureSettings,
  AGENT_WORKFLOW_MAX_OPTION_DEPTH,
  AGENT_WORKFLOW_MAX_TREE_DEPTH,
  countAgentWorkflowOptions,
  countAgentWorkflowOptionTree,
  countAgentWorkflowSteps,
  defaultAgentWorkflowCategoryLabels,
  defaultAgentWorkflowUiConfig,
  findAgentWorkflowOptionByKey,
  findAgentWorkflowStepByKey,
  flattenAgentWorkflowOptionTree,
  getEnabledAgentWorkflowOptionTree,
  getAgentWorkflowCategoryLabels,
  getAgentWorkflowConstraintSettings,
  getAgentWorkflowPageFeatureSettings,
  normalizeAgentWorkflowOptionOrdering,
  flattenAgentWorkflowSteps,
  normalizeAgentWorkflowStepOrdering,
  normalizeAgentWorkflowUiConfig,
} from "@/lib/agents/workflow-ui-config";
import {
  defaultAgentWorkflowBrandModelConfig,
  normalizeAgentWorkflowBrandModelConfig,
} from "@/lib/agents/workflow-brand-model-config";
import {
  AGENT_PRESET_LIBRARY_DEFAULT_SECTION_ID,
  AGENT_PRESET_LIBRARY_MAX_DEPTH,
  defaultAgentPresetLibraryConfig,
  normalizeAgentPresetLibraryConfig,
} from "@/lib/agents/preset-library-config";
import {
  defaultAgentWorkflowShowcaseConfig,
  normalizeAgentWorkflowShowcaseConfig,
} from "@/lib/agents/workflow-showcase-config";
import {
  defaultAgentWorkflowMaterialApiConfig,
  normalizeAgentWorkflowMaterialApiConfig,
} from "@/lib/agents/workflow-material-config";
import {
  defaultAgentWorkflowGoodsInfoApiConfig,
  normalizeAgentWorkflowGoodsInfoApiConfig,
} from "@/lib/agents/workflow-goods-info-config";
import {
  defaultAgentPsdTextColorConfig,
  normalizeAgentPsdTextColorConfig,
  resolveAgentPsdTextColorConfigForBrand,
} from "@/lib/agents/psd-text-color-config";
import {
  defaultAgentPsdTemplateSecondaryCategoryConfig,
  type AgentPsdTemplateSecondaryCategoryConfig,
  normalizeAgentPsdTemplateSecondaryCategoryConfig,
} from "@/lib/agents/psd-template-secondary-category-config";
import {
  AGENT_WORKFLOW_BRAND_IMPORT_ACCEPT,
  downloadAgentWorkflowBrandImportTemplate,
  parseAgentWorkflowBrandImportFile,
} from "@/lib/agents/workflow-brand-import";
import { normalizeHexColor } from "@/lib/agents/psd-text-layout";
import { fetchUploadWithRetry } from "@/lib/client/upload-with-retry";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Switch } from "@/components/ui/switch";
import { Badge } from "@/components/ui/badge";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Collapsible, CollapsibleContent, CollapsibleTrigger } from "@/components/ui/collapsible";
import { Separator } from "@/components/ui/separator";
import { SearchableSelect } from "@/components/ui/searchable-select";
import { cn } from "@/lib/utils";
import type {
  AgentPresetLibraryCategoryNode,
  AgentPresetLibraryConfig,
  AgentPsdTextColorBrandConfig,
  AgentPresetLibrarySection,
  AgentWorkflowBrandModelConfig,
  AgentWorkflowBrandStoreEntry,
  AgentWorkflowCategoryLabels,
  AgentWorkflowFourthCategoryEntry,
  AgentWorkflowGoodsInfoApiConfig,
  AgentWorkflowMaterialApiConfig,
  AgentWorkflowOptionUiConfig,
  AgentPsdTextColorConfig,
  AgentWorkflowStoreEntry,
  AgentWorkflowThirdCategoryEntry,
  AgentWorkflowShowcaseConfig,
  AgentWorkflowStepUiConfig,
  AgentWorkflowUiConfig,
} from "@/types/agent";

const fetcher = (url: string) => fetch(url, { cache: "no-store" }).then((res) => res.json());

// Animation variants
const containerVariants = {
  hidden: { opacity: 0 },
  visible: {
    opacity: 1,
    transition: { staggerChildren: 0.05 }
  }
};

const itemVariants = {
  hidden: { opacity: 0, y: 10 },
  visible: { opacity: 1, y: 0 }
};

const CHINESE_LEVEL_NUMERALS = ["一", "二", "三", "四", "五", "六", "七", "八"];
const WORKFLOW_LEVEL_LABELS = CHINESE_LEVEL_NUMERALS.map((item) => `${item}级模块`);
const WORKFLOW_OPTION_LEVEL_LABELS = CHINESE_LEVEL_NUMERALS.map((item) => `${item}级卡片`);
const PRESET_LIBRARY_LEVEL_LABELS = ["一级分类", "二级分类", "三级分类"];
const WORKFLOW_STEP_DRAG_DATA_TYPE = "application/x-agent-workflow-step";
const WORKFLOW_SETTINGS_DRAFT_STORAGE_KEY = "agent-workflow-settings-draft:v1";
const WORKFLOW_SETTINGS_STALE_DRAFT_STORAGE_KEY = "agent-workflow-settings-stale-draft:v1";
const WORKFLOW_SETTINGS_DRAFT_MAX_AGE_MS = 7 * 24 * 60 * 60 * 1000;
const WORKFLOW_BLOCKED_CANDIDATE_RENDER_LIMIT = 60;

type WorkflowStepDropPosition = "before" | "after" | "inside";

interface WorkflowStepDropTarget {
  stepKey: string | null;
  position: WorkflowStepDropPosition;
}

interface AgentWorkflowSettingsDraftState {
  presetLibraryConfig: AgentPresetLibraryConfig;
  config: AgentWorkflowUiConfig;
  materialApiConfig: AgentWorkflowMaterialApiConfig;
  goodsInfoApiConfig: AgentWorkflowGoodsInfoApiConfig;
  brandModelConfig: AgentWorkflowBrandModelConfig;
  showcaseConfig: AgentWorkflowShowcaseConfig;
  psdTextColorConfig: AgentPsdTextColorConfig;
  psdTemplateSecondaryCategoryConfig: AgentPsdTemplateSecondaryCategoryConfig;
}

interface AgentWorkflowSettingsDraft {
  version: 1 | 2;
  updatedAt: number;
  baseSignature?: string;
  baseSignatures?: Partial<Record<keyof AgentWorkflowSettingsPayload, string>>;
  state: AgentWorkflowSettingsDraftState;
}

type BufferedInputProps = Omit<
  ComponentProps<typeof Input>,
  "defaultValue" | "onChange" | "value"
> & {
  commitDelayMs?: number;
  onValueCommit: (value: string) => void;
  value: string;
};

type BufferedTextareaProps = Omit<
  ComponentProps<typeof Textarea>,
  "defaultValue" | "onChange" | "value"
> & {
  commitDelayMs?: number;
  onValueCommit: (value: string) => void;
  value: string;
};

function scheduleWorkflowIdleTask(callback: () => void, timeoutMs = 2000) {
  if (typeof window === "undefined") {
    return () => {};
  }

  if ("requestIdleCallback" in window && "cancelIdleCallback" in window) {
    const idleId = window.requestIdleCallback(callback, { timeout: timeoutMs });
    return () => window.cancelIdleCallback(idleId);
  }

  const timer = window.setTimeout(callback, timeoutMs);
  return () => window.clearTimeout(timer);
}

function BufferedInput({
  commitDelayMs = 450,
  onBlur,
  onValueCommit,
  value,
  ...props
}: BufferedInputProps) {
  const [draftValue, setDraftValue] = useState(value);
  const committedValueRef = useRef(value);

  useEffect(() => {
    setDraftValue(value);
    committedValueRef.current = value;
  }, [value]);

  const commitValue = (nextValue: string, options?: { immediate?: boolean }) => {
    if (nextValue === committedValueRef.current) {
      return;
    }

    committedValueRef.current = nextValue;
    if (options?.immediate) {
      onValueCommit(nextValue);
      return;
    }

    startTransition(() => {
      onValueCommit(nextValue);
    });
  };

  useEffect(() => {
    if (draftValue === committedValueRef.current) {
      return;
    }

    const timer = window.setTimeout(() => {
      commitValue(draftValue);
    }, commitDelayMs);

    return () => window.clearTimeout(timer);
  }, [commitDelayMs, draftValue]);

  return (
    <Input
      {...props}
      value={draftValue}
      onChange={(event) => setDraftValue(event.target.value)}
      onBlur={(event) => {
        commitValue(draftValue, { immediate: true });
        onBlur?.(event);
      }}
    />
  );
}

function BufferedTextarea({
  commitDelayMs = 450,
  onBlur,
  onValueCommit,
  value,
  ...props
}: BufferedTextareaProps) {
  const [draftValue, setDraftValue] = useState(value);
  const committedValueRef = useRef(value);

  useEffect(() => {
    setDraftValue(value);
    committedValueRef.current = value;
  }, [value]);

  const commitValue = (nextValue: string, options?: { immediate?: boolean }) => {
    if (nextValue === committedValueRef.current) {
      return;
    }

    committedValueRef.current = nextValue;
    if (options?.immediate) {
      onValueCommit(nextValue);
      return;
    }

    startTransition(() => {
      onValueCommit(nextValue);
    });
  };

  useEffect(() => {
    if (draftValue === committedValueRef.current) {
      return;
    }

    const timer = window.setTimeout(() => {
      commitValue(draftValue);
    }, commitDelayMs);

    return () => window.clearTimeout(timer);
  }, [commitDelayMs, draftValue]);

  return (
    <Textarea
      {...props}
      value={draftValue}
      onChange={(event) => setDraftValue(event.target.value)}
      onBlur={(event) => {
        commitValue(draftValue, { immediate: true });
        onBlur?.(event);
      }}
    />
  );
}

function stableStringifyWorkflowDraftValue(value: unknown): string {
  if (value === null || typeof value !== "object") {
    return JSON.stringify(value) ?? "null";
  }

  if (Array.isArray(value)) {
    return `[${value.map((item) => stableStringifyWorkflowDraftValue(item)).join(",")}]`;
  }

  const entries = Object.entries(value as Record<string, unknown>)
    .filter(([, item]) => item !== undefined)
    .sort(([left], [right]) => left.localeCompare(right));

  return `{${entries
    .map(([key, item]) => `${JSON.stringify(key)}:${stableStringifyWorkflowDraftValue(item)}`)
    .join(",")}}`;
}

function createAgentWorkflowValueSignature(value: unknown) {
  const serialized = stableStringifyWorkflowDraftValue(value);
  let hashA = 0xdeadbeef ^ serialized.length;
  let hashB = 0x41c6ce57 ^ serialized.length;

  for (let index = 0; index < serialized.length; index += 1) {
    const code = serialized.charCodeAt(index);
    hashA = Math.imul(hashA ^ code, 2654435761);
    hashB = Math.imul(hashB ^ code, 1597334677);
  }

  hashA =
    Math.imul(hashA ^ (hashA >>> 16), 2246822507) ^
    Math.imul(hashB ^ (hashB >>> 13), 3266489909);
  hashB =
    Math.imul(hashB ^ (hashB >>> 16), 2246822507) ^
    Math.imul(hashA ^ (hashA >>> 13), 3266489909);

  return `${serialized.length}:${(hashB >>> 0).toString(16)}${(hashA >>> 0).toString(16)}`;
}

function createAgentWorkflowSettingsStateSignature(state: AgentWorkflowSettingsDraftState) {
  return createAgentWorkflowValueSignature(state);
}

function createAgentWorkflowSettingsSectionSignatures(state: AgentWorkflowSettingsDraftState) {
  return {
    agentPresetLibraryConfig: createAgentWorkflowValueSignature(state.presetLibraryConfig),
    agentWorkflowUiConfig: createAgentWorkflowValueSignature({
      ...state.config,
      steps: normalizeAgentWorkflowStepOrdering(state.config.steps),
    }),
    agentWorkflowMaterialApiConfig: createAgentWorkflowValueSignature(state.materialApiConfig),
    agentWorkflowGoodsInfoApiConfig: createAgentWorkflowValueSignature(state.goodsInfoApiConfig),
    agentWorkflowBrandModelConfig: createAgentWorkflowValueSignature(state.brandModelConfig),
    agentWorkflowShowcaseConfig: createAgentWorkflowValueSignature(state.showcaseConfig),
    agentPsdTextColorConfig: createAgentWorkflowValueSignature(state.psdTextColorConfig),
    agentPsdTemplateSecondaryCategoryConfig: createAgentWorkflowValueSignature(
      state.psdTemplateSecondaryCategoryConfig
    ),
  } satisfies Record<keyof AgentWorkflowSettingsPayload, string>;
}

function getWorkflowLevelLabel(depth: number, kind: "模块" | "卡片") {
  const labels =
    kind === "模块" ? WORKFLOW_LEVEL_LABELS : WORKFLOW_OPTION_LEVEL_LABELS;
  return (
    labels[Math.max(0, Math.min(depth - 1, labels.length - 1))] ||
    `第 ${depth} 级${kind}`
  );
}

function normalizeConfigOrdering(config: AgentWorkflowUiConfig): AgentWorkflowUiConfig {
  return {
    ...config,
    steps: normalizeAgentWorkflowStepOrdering(config.steps),
  };
}

function createWorkflowSlug(value: string, fallback: string) {
  const normalized = value
    .trim()
    .replace(/\s+/g, "_")
    .replace(/[^\w-]/g, "_")
    .replace(/_+/g, "_")
    .replace(/^_+|_+$/g, "")
    .toLowerCase();
  return normalized || fallback;
}

function ensureUniqueWorkflowKey(baseKey: string, existingKeys: string[]) {
  const normalizedBase = createWorkflowSlug(baseKey, "item");
  const keySet = new Set(existingKeys);
  if (!keySet.has(normalizedBase)) {
    return normalizedBase;
  }

  let suffix = 2;
  let candidate = `${normalizedBase}_${suffix}`;
  while (keySet.has(candidate)) {
    suffix += 1;
    candidate = `${normalizedBase}_${suffix}`;
  }
  return candidate;
}

function createWorkflowOptionDraft(
  stepKey: string,
  optionIndex: number,
  existingOptionKeys: string[]
): AgentWorkflowOptionUiConfig {
  const optionKey = ensureUniqueWorkflowKey(
    `${stepKey}_option_${optionIndex + 1}`,
    existingOptionKeys
  );
  return {
    key: optionKey,
    buttonName: `选项${optionIndex + 1}`,
    description: "",
    previewImageUrl: "",
    enabled: true,
    sortOrder: optionIndex,
    promptFragment: `请按选项${optionIndex + 1}执行。`,
    blockedOptionKeys: [],
    children: [],
  };
}

function createWorkflowStepDraft(
  depth: number,
  stepIndex: number,
  existingStepKeys: string[]
): AgentWorkflowStepUiConfig {
  const levelLabel = getWorkflowLevelLabel(depth, "模块");
  const stepKey = ensureUniqueWorkflowKey(`step_${depth}_${stepIndex + 1}`, existingStepKeys);
  return {
    key: stepKey,
    title: `新${levelLabel}${stepIndex + 1}`,
    description: "",
    enabled: true,
    sortOrder: stepIndex,
    options: [createWorkflowOptionDraft(stepKey, 0, [])],
    children: [],
  };
}

function updateWorkflowStepTree(
  steps: AgentWorkflowStepUiConfig[],
  stepKey: string,
  updater: (step: AgentWorkflowStepUiConfig) => AgentWorkflowStepUiConfig
): AgentWorkflowStepUiConfig[] {
  let changed = false;
  const nextSteps = steps.map((step) => {
    if (step.key === stepKey) {
      const updatedStep = updater(step);
      if (updatedStep !== step) {
        changed = true;
      }
      return updatedStep;
    }

    if (!step.children || step.children.length === 0) {
      return step;
    }

    const nextChildren = updateWorkflowStepTree(step.children, stepKey, updater);
    if (nextChildren === step.children) {
      return step;
    }

    changed = true;
    return {
      ...step,
      children: nextChildren,
    };
  });

  return changed ? nextSteps : steps;
}

function collectWorkflowOptionKeys(options: AgentWorkflowOptionUiConfig[]): string[] {
  return flattenAgentWorkflowOptionTree(options).map(({ option }) => option.key);
}

function collectWorkflowOptionRelations(
  options: AgentWorkflowOptionUiConfig[],
  ancestors: string[] = []
): Array<{
  key: string;
  label: string;
  depth: number;
}> {
  return options.flatMap((option) => {
    const currentPath = [...ancestors, option.buttonName || option.key];
    return [
      {
        key: option.key,
        label: currentPath.join(" / "),
        depth: currentPath.length,
      },
      ...collectWorkflowOptionRelations(option.children || [], currentPath),
    ];
  });
}

function collectWorkflowOptionRelationsFromSteps(
  steps: AgentWorkflowStepUiConfig[]
): Array<{
  key: string;
  label: string;
  depth: number;
  stepKey: string;
  stepTitle: string;
}> {
  return flattenAgentWorkflowSteps(steps).flatMap(({ step }) =>
    collectWorkflowOptionRelations(step.options || []).map((item) => ({
      ...item,
      label: `${step.title} / ${item.label}`,
      stepKey: step.key,
      stepTitle: step.title,
    }))
  );
}

type WorkflowOptionRelation = ReturnType<typeof collectWorkflowOptionRelationsFromSteps>[number];

function updateWorkflowOptionTree(
  options: AgentWorkflowOptionUiConfig[],
  optionKey: string,
  updater: (option: AgentWorkflowOptionUiConfig) => AgentWorkflowOptionUiConfig
): AgentWorkflowOptionUiConfig[] {
  let changed = false;
  const nextOptions = options.map((option) => {
    if (option.key === optionKey) {
      const updatedOption = updater(option);
      if (updatedOption !== option) {
        changed = true;
      }
      return updatedOption;
    }

    if (!option.children || option.children.length === 0) {
      return option;
    }

    const nextChildren = updateWorkflowOptionTree(option.children, optionKey, updater);
    if (nextChildren === option.children) {
      return option;
    }

    changed = true;
    return {
      ...option,
      children: nextChildren,
    };
  });

  return changed ? nextOptions : options;
}

function removeWorkflowOptionTree(
  options: AgentWorkflowOptionUiConfig[],
  optionKey: string
): AgentWorkflowOptionUiConfig[] {
  return options
    .filter((option) => option.key !== optionKey)
    .map((option) => ({
      ...option,
      children: removeWorkflowOptionTree(option.children || [], optionKey),
    }));
}

function removeWorkflowStepTree(
  steps: AgentWorkflowStepUiConfig[],
  stepKey: string
): AgentWorkflowStepUiConfig[] {
  return steps
    .filter((step) => step.key !== stepKey)
    .map((step) => ({
      ...step,
      children: removeWorkflowStepTree(step.children || [], stepKey),
    }));
}

function moveArrayItem<T>(items: T[], fromIndex: number, toIndex: number): T[] {
  if (
    fromIndex === toIndex ||
    fromIndex < 0 ||
    toIndex < 0 ||
    fromIndex >= items.length ||
    toIndex >= items.length
  ) {
    return items;
  }

  const nextItems = [...items];
  const [movedItem] = nextItems.splice(fromIndex, 1);
  nextItems.splice(toIndex, 0, movedItem);
  return nextItems;
}

function collectWorkflowStepKeys(steps: AgentWorkflowStepUiConfig[]): string[] {
  return flattenAgentWorkflowSteps(steps).map(({ step }) => step.key);
}

function collectDescendantStepKeys(step: AgentWorkflowStepUiConfig): string[] {
  return [step.key, ...collectWorkflowStepKeys(step.children || [])];
}

function collectWorkflowOptionKeysFromSteps(steps: AgentWorkflowStepUiConfig[]): string[] {
  return flattenAgentWorkflowSteps(steps).flatMap(({ step }) =>
    collectWorkflowOptionKeys(step.options || [])
  );
}

function isWorkflowStepTargetInsideSource(
  sourceStep: AgentWorkflowStepUiConfig,
  targetStepKey: string | null
) {
  if (!targetStepKey) {
    return false;
  }
  return collectDescendantStepKeys(sourceStep).includes(targetStepKey);
}

function getWorkflowStepSubtreeDepth(step: AgentWorkflowStepUiConfig): number {
  const childDepths = (step.children || []).map(getWorkflowStepSubtreeDepth);
  return 1 + (childDepths.length > 0 ? Math.max(...childDepths) : 0);
}

function getWorkflowStepInsertionDepth(
  steps: AgentWorkflowStepUiConfig[],
  targetStepKey: string | null,
  position: WorkflowStepDropPosition
): number | null {
  if (!targetStepKey) {
    return 1;
  }

  const targetMeta = flattenAgentWorkflowSteps(steps).find(
    ({ step }) => step.key === targetStepKey
  );
  if (!targetMeta) {
    return null;
  }

  return position === "inside" ? targetMeta.depth + 1 : targetMeta.depth;
}

function extractWorkflowStepFromTree(
  steps: AgentWorkflowStepUiConfig[],
  stepKey: string
): {
  steps: AgentWorkflowStepUiConfig[];
  extractedStep: AgentWorkflowStepUiConfig | null;
} {
  let extractedStep: AgentWorkflowStepUiConfig | null = null;

  const nextSteps = steps
    .filter((step) => {
      if (step.key === stepKey) {
        extractedStep = step;
        return false;
      }
      return true;
    })
    .map((step) => {
      if (extractedStep) {
        return step;
      }

      const childResult = extractWorkflowStepFromTree(step.children || [], stepKey);
      if (childResult.extractedStep) {
        extractedStep = childResult.extractedStep;
        return {
          ...step,
          children: childResult.steps,
        };
      }

      return step;
    });

  return {
    steps: nextSteps,
    extractedStep,
  };
}

function insertWorkflowStepIntoTree(
  steps: AgentWorkflowStepUiConfig[],
  targetStepKey: string | null,
  position: WorkflowStepDropPosition,
  stepToInsert: AgentWorkflowStepUiConfig
): {
  steps: AgentWorkflowStepUiConfig[];
  inserted: boolean;
} {
  if (!targetStepKey) {
    return {
      steps: [...steps, stepToInsert],
      inserted: true,
    };
  }

  let inserted = false;
  const nextSteps = steps.flatMap((step) => {
    if (step.key === targetStepKey) {
      inserted = true;
      if (position === "before") {
        return [stepToInsert, step];
      }
      if (position === "after") {
        return [step, stepToInsert];
      }
      return [
        {
          ...step,
          children: [...(step.children || []), stepToInsert],
        },
      ];
    }

    const childResult = insertWorkflowStepIntoTree(
      step.children || [],
      targetStepKey,
      position,
      stepToInsert
    );
    if (childResult.inserted) {
      inserted = true;
      return [
        {
          ...step,
          children: childResult.steps,
        },
      ];
    }

    return [step];
  });

  return {
    steps: nextSteps,
    inserted,
  };
}

function cloneWorkflowOptionSnapshot(
  option: AgentWorkflowOptionUiConfig
): AgentWorkflowOptionUiConfig {
  return {
    ...option,
    blockedOptionKeys: [...(option.blockedOptionKeys || [])],
    children: (option.children || []).map(cloneWorkflowOptionSnapshot),
  };
}

function cloneWorkflowStepSnapshot(
  step: AgentWorkflowStepUiConfig
): AgentWorkflowStepUiConfig {
  return {
    ...step,
    options: (step.options || []).map(cloneWorkflowOptionSnapshot),
    children: (step.children || []).map(cloneWorkflowStepSnapshot),
  };
}

function remapWorkflowOptionBlockedKeys(
  options: AgentWorkflowOptionUiConfig[],
  keyMap: Map<string, string>
): AgentWorkflowOptionUiConfig[] {
  return options.map((option) => ({
    ...option,
    blockedOptionKeys: (option.blockedOptionKeys || []).map((blockedKey) =>
      keyMap.get(blockedKey) || blockedKey
    ),
    children: remapWorkflowOptionBlockedKeys(option.children || [], keyMap),
  }));
}

function remapWorkflowStepBlockedKeys(
  step: AgentWorkflowStepUiConfig,
  keyMap: Map<string, string>
): AgentWorkflowStepUiConfig {
  return {
    ...step,
    options: remapWorkflowOptionBlockedKeys(step.options || [], keyMap),
    children: (step.children || []).map((childStep) =>
      remapWorkflowStepBlockedKeys(childStep, keyMap)
    ),
  };
}

function cloneWorkflowOptionsForPaste(
  options: AgentWorkflowOptionUiConfig[],
  stepKey: string,
  usedOptionKeys: Set<string>,
  keyMap: Map<string, string>
): AgentWorkflowOptionUiConfig[] {
  return options.map((option, optionIndex) => {
    const nextKey = ensureUniqueWorkflowKey(
      `${stepKey}_${option.key || `option_${optionIndex + 1}`}_copy`,
      Array.from(usedOptionKeys)
    );
    usedOptionKeys.add(nextKey);
    keyMap.set(option.key, nextKey);
    return {
      ...option,
      key: nextKey,
      sortOrder: option.sortOrder ?? optionIndex,
      children: cloneWorkflowOptionsForPaste(option.children || [], stepKey, usedOptionKeys, keyMap),
    };
  });
}

function cloneWorkflowStepForPaste(
  step: AgentWorkflowStepUiConfig,
  usedStepKeys: Set<string>,
  usedOptionKeys: Set<string>
): AgentWorkflowStepUiConfig {
  const optionKeyMap = new Map<string, string>();

  const cloneStep = (
    currentStep: AgentWorkflowStepUiConfig,
    isRootCopy: boolean
  ): AgentWorkflowStepUiConfig => {
    const nextStepKey = ensureUniqueWorkflowKey(
      `${currentStep.key}_copy`,
      Array.from(usedStepKeys)
    );
    usedStepKeys.add(nextStepKey);

    return {
      ...currentStep,
      key: nextStepKey,
      title: isRootCopy ? `${currentStep.title || "未命名模块"} 副本` : currentStep.title,
      sortOrder: 0,
      options: cloneWorkflowOptionsForPaste(
        currentStep.options || [],
        nextStepKey,
        usedOptionKeys,
        optionKeyMap
      ),
      children: (currentStep.children || []).map((childStep) => cloneStep(childStep, false)),
    };
  };

  return remapWorkflowStepBlockedKeys(cloneStep(step, true), optionKeyMap);
}

function readAgentWorkflowSettingsDraft(): AgentWorkflowSettingsDraft | null {
  if (typeof window === "undefined") {
    return null;
  }

  try {
    const rawDraft = window.localStorage.getItem(WORKFLOW_SETTINGS_DRAFT_STORAGE_KEY);
    if (!rawDraft) {
      return null;
    }

    const parsed = JSON.parse(rawDraft) as Partial<AgentWorkflowSettingsDraft>;
    const isLegacyDraft = parsed?.version === 1;
    const isVersionedDraft =
      parsed?.version === 2 &&
      typeof parsed.baseSignature === "string" &&
      parsed.baseSignature.length > 0;

    if (
      (!isLegacyDraft && !isVersionedDraft) ||
      typeof parsed.updatedAt !== "number" ||
      !parsed.state ||
      typeof parsed.state !== "object"
    ) {
      removeAgentWorkflowSettingsDraft();
      return null;
    }

    if (Date.now() - parsed.updatedAt > WORKFLOW_SETTINGS_DRAFT_MAX_AGE_MS) {
      removeAgentWorkflowSettingsDraft();
      return null;
    }

    return parsed as AgentWorkflowSettingsDraft;
  } catch {
    return null;
  }
}

function writeAgentWorkflowSettingsDraft(draft: AgentWorkflowSettingsDraft) {
  if (typeof window === "undefined") {
    return;
  }
  window.localStorage.setItem(WORKFLOW_SETTINGS_DRAFT_STORAGE_KEY, JSON.stringify(draft));
}

function preserveAgentWorkflowSettingsDraftForRecovery(draft: AgentWorkflowSettingsDraft) {
  if (typeof window === "undefined") {
    return;
  }
  window.localStorage.setItem(
    WORKFLOW_SETTINGS_STALE_DRAFT_STORAGE_KEY,
    JSON.stringify({
      ...draft,
      preservedAt: Date.now(),
    })
  );
}

function readPreservedAgentWorkflowSettingsDraftForRecovery(): AgentWorkflowSettingsDraft | null {
  if (typeof window === "undefined") {
    return null;
  }

  try {
    const rawDraft = window.localStorage.getItem(WORKFLOW_SETTINGS_STALE_DRAFT_STORAGE_KEY);
    if (!rawDraft) {
      return null;
    }

    const parsed = JSON.parse(rawDraft) as Partial<AgentWorkflowSettingsDraft>;
    if (
      (parsed?.version !== 1 && parsed?.version !== 2) ||
      typeof parsed.updatedAt !== "number" ||
      !parsed.state ||
      typeof parsed.state !== "object"
    ) {
      return null;
    }

    return parsed as AgentWorkflowSettingsDraft;
  } catch {
    return null;
  }
}

function removeAgentWorkflowSettingsDraft() {
  if (typeof window === "undefined") {
    return;
  }
  window.localStorage.removeItem(WORKFLOW_SETTINGS_DRAFT_STORAGE_KEY);
}

function createPresetLibraryId(value: string, fallback: string) {
  const normalized = value
    .trim()
    .replace(/\s+/g, "_")
    .replace(/[^\w-]/g, "_")
    .replace(/_+/g, "_")
    .replace(/^_+|_+$/g, "")
    .toLowerCase();
  return normalized || fallback;
}

function ensureUniquePresetLibraryId(baseId: string, existingIds: string[]) {
  const normalizedBase = createPresetLibraryId(baseId, "item");
  const idSet = new Set(existingIds);
  if (!idSet.has(normalizedBase)) {
    return normalizedBase;
  }

  let suffix = 2;
  let candidate = `${normalizedBase}_${suffix}`;
  while (idSet.has(candidate)) {
    suffix += 1;
    candidate = `${normalizedBase}_${suffix}`;
  }
  return candidate;
}

function collectPresetLibraryNodeIds(
  nodes: AgentPresetLibraryCategoryNode[]
): string[] {
  return nodes.flatMap((node) => [node.id, ...collectPresetLibraryNodeIds(node.children || [])]);
}

function countPresetLibraryNodes(nodes: AgentPresetLibraryCategoryNode[]): number {
  return nodes.reduce(
    (total, node) => total + 1 + countPresetLibraryNodes(node.children || []),
    0
  );
}

function updatePresetLibraryNodeTree(
  nodes: AgentPresetLibraryCategoryNode[],
  nodeId: string,
  updater: (node: AgentPresetLibraryCategoryNode) => AgentPresetLibraryCategoryNode
): AgentPresetLibraryCategoryNode[] {
  return nodes.map((node) => {
    if (node.id === nodeId) {
      return updater(node);
    }

    return {
      ...node,
      children: updatePresetLibraryNodeTree(node.children || [], nodeId, updater),
    };
  });
}

function removePresetLibraryNodeTree(
  nodes: AgentPresetLibraryCategoryNode[],
  nodeId: string
): AgentPresetLibraryCategoryNode[] {
  return nodes
    .filter((node) => node.id !== nodeId)
    .map((node) => ({
      ...node,
      children: removePresetLibraryNodeTree(node.children || [], nodeId),
    }));
}

function findPresetLibraryNodeById(
  nodes: AgentPresetLibraryCategoryNode[],
  nodeId: string
): AgentPresetLibraryCategoryNode | null {
  for (const node of nodes) {
    if (node.id === nodeId) {
      return node;
    }
    const foundChild = findPresetLibraryNodeById(node.children || [], nodeId);
    if (foundChild) {
      return foundChild;
    }
  }
  return null;
}

function createPresetLibraryNodeDraft(
  depth: number,
  nodeIndex: number,
  existingIds: string[]
): AgentPresetLibraryCategoryNode {
  const levelLabel =
    PRESET_LIBRARY_LEVEL_LABELS[Math.max(0, Math.min(depth - 1, 2))] || "分类";
  return {
    id: ensureUniquePresetLibraryId(`category_${depth}_${nodeIndex + 1}`, existingIds),
    name: `新${levelLabel}${nodeIndex + 1}`,
    enabled: true,
    sortOrder: nodeIndex,
    children: [],
  };
}

function createPresetLibrarySectionDraft(
  sectionIndex: number,
  existingIds: string[]
): AgentPresetLibrarySection {
  const fallbackId =
    sectionIndex === 0 ? AGENT_PRESET_LIBRARY_DEFAULT_SECTION_ID : `section_${sectionIndex + 1}`;
  return {
    id: ensureUniquePresetLibraryId(fallbackId, existingIds),
    label: `分类页${sectionIndex + 1}`,
    description: "",
    enabled: true,
    sortOrder: sectionIndex,
    categories: [],
  };
}

function buildWorkflowInputOptionsFromBrandEntries(
  entries: AgentWorkflowBrandStoreEntry[],
  priceBands: string[] = [],
  categoryLabels: Partial<AgentWorkflowCategoryLabels> = defaultAgentWorkflowCategoryLabels
) {
  const resolvedCategoryLabels = {
    ...defaultAgentWorkflowCategoryLabels,
    ...categoryLabels,
  };
  type FourthCategoryBuilder = {
    categoryName: string;
    fifthCategoryMap: Map<string, string>;
    sortOrder: number;
  };

  type ThirdCategoryBuilder = {
    categoryName: string;
    fourthCategoryMap: Map<string, FourthCategoryBuilder>;
    sortOrder: number;
  };

  type StoreBuilder = {
    storeName: string;
    thirdCategoryMap: Map<string, ThirdCategoryBuilder>;
    sortOrder: number;
  };

  type BrandBuilder = {
    brandName: string;
    storeMap: Map<string, StoreBuilder>;
    sortOrder: number;
  };

  const brandMap = new Map<string, BrandBuilder>();

  const ensureBrandBuilder = (brandName: string, sortOrder: number) => {
    const normalizedBrandName = String(brandName || "").trim();
    if (!normalizedBrandName) {
      return null;
    }

    const key = normalizedBrandName.toLowerCase();
    const existing = brandMap.get(key);
    if (existing) {
      return existing;
    }

    const nextBuilder: BrandBuilder = {
      brandName: normalizedBrandName,
      storeMap: new Map<string, StoreBuilder>(),
      sortOrder,
    };
    brandMap.set(key, nextBuilder);
    return nextBuilder;
  };

  const ensureStoreBuilder = (
    brandBuilder: BrandBuilder,
    storeName: string,
    sortOrder: number
  ) => {
    const normalizedStoreName = String(storeName || "").trim();
    if (!normalizedStoreName) {
      return null;
    }

    const key = normalizedStoreName.toLowerCase();
    const existing = brandBuilder.storeMap.get(key);
    if (existing) {
      return existing;
    }

    const nextBuilder: StoreBuilder = {
      storeName: normalizedStoreName,
      thirdCategoryMap: new Map<string, ThirdCategoryBuilder>(),
      sortOrder,
    };
    brandBuilder.storeMap.set(key, nextBuilder);
    return nextBuilder;
  };

  const ensureThirdCategoryBuilder = (
    storeBuilder: StoreBuilder,
    categoryName: string,
    sortOrder: number
  ) => {
    const normalizedCategoryName = String(categoryName || "").trim();
    if (!normalizedCategoryName) {
      return null;
    }

    const key = normalizedCategoryName.toLowerCase();
    const existing = storeBuilder.thirdCategoryMap.get(key);
    if (existing) {
      return existing;
    }

    const nextBuilder: ThirdCategoryBuilder = {
      categoryName: normalizedCategoryName,
      fourthCategoryMap: new Map<string, FourthCategoryBuilder>(),
      sortOrder,
    };
    storeBuilder.thirdCategoryMap.set(key, nextBuilder);
    return nextBuilder;
  };

  const ensureFourthCategoryBuilder = (
    thirdCategoryBuilder: ThirdCategoryBuilder,
    categoryName: string,
    sortOrder: number
  ) => {
    const normalizedCategoryName = String(categoryName || "").trim();
    if (!normalizedCategoryName) {
      return null;
    }

    const key = normalizedCategoryName.toLowerCase();
    const existing = thirdCategoryBuilder.fourthCategoryMap.get(key);
    if (existing) {
      return existing;
    }

    const nextBuilder: FourthCategoryBuilder = {
      categoryName: normalizedCategoryName,
      fifthCategoryMap: new Map<string, string>(),
      sortOrder,
    };
    thirdCategoryBuilder.fourthCategoryMap.set(key, nextBuilder);
    return nextBuilder;
  };

  entries.forEach((entry, brandIndex) => {
    const brandBuilder = ensureBrandBuilder(entry.brandName, brandIndex);
    if (!brandBuilder) {
      return;
    }

    const legacyStoreNames = Array.from(
      new Set(
        (entry.stores || [])
          .map((storeName) => String(storeName || "").trim())
          .filter(Boolean)
      )
    );
    legacyStoreNames.forEach((storeName, storeIndex) => {
      ensureStoreBuilder(brandBuilder, storeName, storeIndex);
    });

    (entry.storeEntries || []).forEach((storeEntry, storeIndex) => {
      const storeBuilder = ensureStoreBuilder(brandBuilder, storeEntry.storeName, storeIndex);
      if (!storeBuilder) {
        return;
      }

      const legacyThirdCategoryNames = Array.from(
        new Set(
          (storeEntry.thirdCategories || [])
            .map((thirdCategory) => String(thirdCategory || "").trim())
            .filter(Boolean)
        )
      );
      legacyThirdCategoryNames.forEach((thirdCategory, thirdIndex) => {
        ensureThirdCategoryBuilder(storeBuilder, thirdCategory, thirdIndex);
      });

      (storeEntry.thirdCategoryEntries || []).forEach((thirdEntry, thirdIndex) => {
        const thirdCategoryBuilder = ensureThirdCategoryBuilder(
          storeBuilder,
          thirdEntry.categoryName,
          thirdIndex
        );
        if (!thirdCategoryBuilder) {
          return;
        }

        const legacyFourthCategoryNames = Array.from(
          new Set(
            (thirdEntry.fourthCategories || [])
              .map((fourthCategory) => String(fourthCategory || "").trim())
              .filter(Boolean)
          )
        );
        legacyFourthCategoryNames.forEach((fourthCategory, fourthIndex) => {
          ensureFourthCategoryBuilder(thirdCategoryBuilder, fourthCategory, fourthIndex);
        });

        (thirdEntry.fourthCategoryEntries || []).forEach((fourthEntry, fourthIndex) => {
          const fourthCategoryBuilder = ensureFourthCategoryBuilder(
            thirdCategoryBuilder,
            fourthEntry.categoryName,
            fourthIndex
          );
          if (!fourthCategoryBuilder) {
            return;
          }

          (fourthEntry.fifthCategories || []).forEach((fifthCategory) => {
            const normalizedFifthCategory = String(fifthCategory || "").trim();
            if (!normalizedFifthCategory) {
              return;
            }

            const key = normalizedFifthCategory.toLowerCase();
            if (!fourthCategoryBuilder.fifthCategoryMap.has(key)) {
              fourthCategoryBuilder.fifthCategoryMap.set(key, normalizedFifthCategory);
            }
          });
        });
      });
    });
  });

  const normalizedEntries = Array.from(brandMap.values())
    .sort((left, right) => left.sortOrder - right.sortOrder)
    .map((brandEntry, brandIndex) => {
      const storeEntries = Array.from(brandEntry.storeMap.values())
        .sort((left, right) => left.sortOrder - right.sortOrder)
        .map((storeEntry, storeIndex) => {
          const thirdCategoryEntries = Array.from(storeEntry.thirdCategoryMap.values())
            .sort((left, right) => left.sortOrder - right.sortOrder)
            .map((thirdEntry, thirdIndex) => {
              const fourthCategoryEntries = Array.from(thirdEntry.fourthCategoryMap.values())
                .sort((left, right) => left.sortOrder - right.sortOrder)
                .map((fourthEntry, fourthIndex) => ({
                  categoryName: fourthEntry.categoryName,
                  fifthCategories: Array.from(fourthEntry.fifthCategoryMap.values()),
                  sortOrder: fourthIndex,
                }));

              return {
                categoryName: thirdEntry.categoryName,
                fourthCategories: fourthCategoryEntries.map((fourthEntry) => fourthEntry.categoryName),
                fourthCategoryEntries,
                sortOrder: thirdIndex,
              };
            });

          return {
            storeName: storeEntry.storeName,
            thirdCategories: thirdCategoryEntries.map((thirdEntry) => thirdEntry.categoryName),
            thirdCategoryEntries,
            sortOrder: storeIndex,
          };
        });

      return {
        brandName: brandEntry.brandName,
        storeEntries,
        sortOrder: brandIndex,
      };
    });
  const normalizedPriceBands = Array.from(
    new Set(
      priceBands
        .map((item) => item.trim())
        .filter(Boolean)
    )
  );

  return {
    brandStoreEntries: normalizedEntries.map((entry) => ({
      ...entry,
      stores: entry.storeEntries.map((storeEntry) => storeEntry.storeName),
    })),
    brands: normalizedEntries.map((entry) => entry.brandName),
    stores: Array.from(
      new Set(
        normalizedEntries.flatMap((entry) =>
          entry.storeEntries.map((storeEntry) => storeEntry.storeName)
        )
      )
    ),
    thirdCategories: Array.from(
      new Set(
        normalizedEntries.flatMap((entry) =>
          entry.storeEntries.flatMap((storeEntry) => storeEntry.thirdCategories || [])
        )
      )
    ),
    fourthCategories: Array.from(
      new Set(
        normalizedEntries.flatMap((entry) =>
          entry.storeEntries.flatMap((storeEntry) =>
            (storeEntry.thirdCategoryEntries || []).flatMap(
              (thirdEntry) => thirdEntry.fourthCategories || []
            )
          )
        )
      )
    ),
    fifthCategories: Array.from(
      new Set(
        normalizedEntries.flatMap((entry) =>
          entry.storeEntries.flatMap((storeEntry) =>
            (storeEntry.thirdCategoryEntries || []).flatMap((thirdEntry) =>
              (thirdEntry.fourthCategoryEntries || []).flatMap(
                (fourthEntry) => fourthEntry.fifthCategories || []
              )
            )
          )
        )
      )
    ),
    categoryLabels: resolvedCategoryLabels,
    priceBands: normalizedPriceBands,
  };
}

function createStoreDraftKey(brandName: string, storeName: string) {
  return `${brandName}::${storeName}`;
}

function createThirdCategoryDraftKey(brandName: string, storeName: string, thirdCategory: string) {
  return `${brandName}::${storeName}::${thirdCategory}`;
}

function createFourthCategoryDraftKey(
  brandName: string,
  storeName: string,
  thirdCategory: string,
  fourthCategory: string
) {
  return `${brandName}::${storeName}::${thirdCategory}::${fourthCategory}`;
}

interface AgentWorkflowSettingsClientProps {
  backHref?: string;
  backLabel?: string;
}

interface AgentWorkflowSettingsPayload {
  agentPresetLibraryConfig?: AgentPresetLibraryConfig;
  agentWorkflowUiConfig?: AgentWorkflowUiConfig;
  agentWorkflowMaterialApiConfig?: AgentWorkflowMaterialApiConfig;
  agentWorkflowGoodsInfoApiConfig?: AgentWorkflowGoodsInfoApiConfig;
  agentWorkflowBrandModelConfig?: AgentWorkflowBrandModelConfig;
  agentWorkflowShowcaseConfig?: AgentWorkflowShowcaseConfig;
  agentPsdTextColorConfig?: AgentPsdTextColorConfig;
  agentPsdTemplateSecondaryCategoryConfig?: AgentPsdTemplateSecondaryCategoryConfig;
}

function createAgentWorkflowSettingsStateFromPayload(
  payload?: AgentWorkflowSettingsPayload | null
): AgentWorkflowSettingsDraftState {
  return {
    presetLibraryConfig: normalizeAgentPresetLibraryConfig(payload?.agentPresetLibraryConfig),
    config: normalizeConfigOrdering(normalizeAgentWorkflowUiConfig(payload?.agentWorkflowUiConfig)),
    materialApiConfig: normalizeAgentWorkflowMaterialApiConfig(
      payload?.agentWorkflowMaterialApiConfig
    ),
    goodsInfoApiConfig: normalizeAgentWorkflowGoodsInfoApiConfig(
      payload?.agentWorkflowGoodsInfoApiConfig
    ),
    showcaseConfig: normalizeAgentWorkflowShowcaseConfig(payload?.agentWorkflowShowcaseConfig),
    psdTextColorConfig: normalizeAgentPsdTextColorConfig(payload?.agentPsdTextColorConfig),
    psdTemplateSecondaryCategoryConfig: normalizeAgentPsdTemplateSecondaryCategoryConfig(
      payload?.agentPsdTemplateSecondaryCategoryConfig
    ),
    brandModelConfig: normalizeAgentWorkflowBrandModelConfig(
      payload?.agentWorkflowBrandModelConfig
    ),
  };
}

type AgentWorkflowSettingsField = keyof AgentWorkflowSettingsPayload;

const AGENT_WORKFLOW_SETTINGS_FIELD_LABELS: Record<AgentWorkflowSettingsField, string> = {
  agentPresetLibraryConfig: "预设库",
  agentWorkflowUiConfig: "工作流步骤",
  agentWorkflowMaterialApiConfig: "素材搜索接口",
  agentWorkflowGoodsInfoApiConfig: "商品信息接口",
  agentWorkflowBrandModelConfig: "品牌模特",
  agentWorkflowShowcaseConfig: "页面展示",
  agentPsdTextColorConfig: "PSD 文字颜色",
  agentPsdTemplateSecondaryCategoryConfig: "PSD 二级分类",
};

function getAgentWorkflowSettingsPayloadEntries(state: AgentWorkflowSettingsDraftState) {
  return [
    {
      field: "agentPresetLibraryConfig",
      value: state.presetLibraryConfig,
    },
    {
      field: "agentWorkflowUiConfig",
      value: state.config,
    },
    {
      field: "agentWorkflowMaterialApiConfig",
      value: state.materialApiConfig,
    },
    {
      field: "agentWorkflowGoodsInfoApiConfig",
      value: state.goodsInfoApiConfig,
    },
    {
      field: "agentWorkflowBrandModelConfig",
      value: state.brandModelConfig,
    },
    {
      field: "agentWorkflowShowcaseConfig",
      value: state.showcaseConfig,
    },
    {
      field: "agentPsdTextColorConfig",
      value: state.psdTextColorConfig,
    },
    {
      field: "agentPsdTemplateSecondaryCategoryConfig",
      value: state.psdTemplateSecondaryCategoryConfig,
    },
  ] satisfies Array<{ field: AgentWorkflowSettingsField; value: unknown }>;
}

export function AgentWorkflowSettingsClient({
  backHref = "/settings",
  backLabel = "返回设置",
}: AgentWorkflowSettingsClientProps = {}) {
  const { data, isLoading, mutate } = useSWR<AgentWorkflowSettingsPayload>(
    "/api/site-settings",
    fetcher,
    { refreshInterval: 60_000 }
  );
  const [presetLibraryConfig, setPresetLibraryConfig] = useState<AgentPresetLibraryConfig>(
    defaultAgentPresetLibraryConfig
  );
  const [config, setConfig] = useState<AgentWorkflowUiConfig>(defaultAgentWorkflowUiConfig);
  const [materialApiConfig, setMaterialApiConfig] = useState<AgentWorkflowMaterialApiConfig>(
    defaultAgentWorkflowMaterialApiConfig
  );
  const [goodsInfoApiConfig, setGoodsInfoApiConfig] = useState<AgentWorkflowGoodsInfoApiConfig>(
    defaultAgentWorkflowGoodsInfoApiConfig
  );
  const [showcaseConfig, setShowcaseConfig] = useState<AgentWorkflowShowcaseConfig>(
    defaultAgentWorkflowShowcaseConfig
  );
  const [psdTextColorConfig, setPsdTextColorConfig] = useState<AgentPsdTextColorConfig>(
    defaultAgentPsdTextColorConfig
  );
  const [psdTemplateSecondaryCategoryConfig, setPsdTemplateSecondaryCategoryConfig] =
    useState<AgentPsdTemplateSecondaryCategoryConfig>(
      defaultAgentPsdTemplateSecondaryCategoryConfig
    );
  const [brandModelConfig, setBrandModelConfig] = useState<AgentWorkflowBrandModelConfig>(
    defaultAgentWorkflowBrandModelConfig
  );
  const [isSaving, setIsSaving] = useState(false);
  const [uploadingKey, setUploadingKey] = useState<string | null>(null);
  const [expandedSteps, setExpandedSteps] = useState<Set<string>>(new Set());
  const [expandedWorkflowOptions, setExpandedWorkflowOptions] = useState<Record<string, boolean>>(
    {}
  );
  const [expandedPresetLibraryNodes, setExpandedPresetLibraryNodes] = useState<
    Record<string, boolean>
  >({});
  const [activeTab, setActiveTab] = useState("showcase");
  const [brandDraft, setBrandDraft] = useState("");
  const [priceBandDraft, setPriceBandDraft] = useState("");
  const [selectedPsdTextColorBrand, setSelectedPsdTextColorBrand] = useState("");
  const [storeDrafts, setStoreDrafts] = useState<Record<string, string>>({});
  const [thirdCategoryDrafts, setThirdCategoryDrafts] = useState<Record<string, string>>({});
  const [fourthCategoryDrafts, setFourthCategoryDrafts] = useState<Record<string, string>>({});
  const [fifthCategoryDrafts, setFifthCategoryDrafts] = useState<Record<string, string>>({});
  const [blockedOptionSearches, setBlockedOptionSearches] = useState<Record<string, string>>({});
  const [expandedBlockedOptionPanels, setExpandedBlockedOptionPanels] = useState<Record<string, boolean>>({});
  const [isImportingBrandSheet, setIsImportingBrandSheet] = useState(false);
  const [draggedStepKey, setDraggedStepKey] = useState<string | null>(null);
  const [stepDropTarget, setStepDropTarget] = useState<WorkflowStepDropTarget | null>(null);
  const [copiedWorkflowStep, setCopiedWorkflowStep] = useState<AgentWorkflowStepUiConfig | null>(
    null
  );
  const [autoDraftUpdatedAt, setAutoDraftUpdatedAt] = useState<number | null>(null);
  const [autoDraftStatus, setAutoDraftStatus] = useState<"idle" | "restored" | "saved">("idle");
  const [recoverableDraftUpdatedAt, setRecoverableDraftUpdatedAt] = useState<number | null>(null);
  const fileInputRefs = useRef<Record<string, HTMLInputElement | null>>({});
  const brandImportInputRef = useRef<HTMLInputElement | null>(null);
  const hasAppliedInitialSettingsRef = useRef(false);
  const hasHydratedSettingsRef = useRef(false);
  const isApplyingSettingsRef = useRef(false);
  const serverDraftBaseSignatureRef = useRef<string | null>(null);
  const serverDraftBaseSignaturesRef = useRef<
    Record<keyof AgentWorkflowSettingsPayload, string> | null
  >(null);
  const hasWarnedRemoteWorkflowUpdateRef = useRef(false);
  const draftCancelRef = useRef<(() => void) | null>(null);

  useEffect(() => {
    if (!data) return;
    if (hasAppliedInitialSettingsRef.current) return;

    hasAppliedInitialSettingsRef.current = true;
    hasHydratedSettingsRef.current = false;
    isApplyingSettingsRef.current = true;

    const serverState = createAgentWorkflowSettingsStateFromPayload(data);

    const serverSignature = createAgentWorkflowSettingsStateSignature(serverState);
    const serverSignatures = createAgentWorkflowSettingsSectionSignatures(serverState);
    serverDraftBaseSignatureRef.current = serverSignature;
    serverDraftBaseSignaturesRef.current = serverSignatures;
    hasWarnedRemoteWorkflowUpdateRef.current = false;

    const draft = readAgentWorkflowSettingsDraft();
    let restoredDraft: AgentWorkflowSettingsDraft | null = null;
    let nextState: AgentWorkflowSettingsDraftState = serverState;

    if (draft) {
      if (draft.version === 2 && draft.baseSignature === serverSignature) {
        restoredDraft = draft;
        nextState = {
          presetLibraryConfig: normalizeAgentPresetLibraryConfig(draft.state.presetLibraryConfig),
          config: normalizeConfigOrdering(normalizeAgentWorkflowUiConfig(draft.state.config)),
          materialApiConfig: normalizeAgentWorkflowMaterialApiConfig(
            draft.state.materialApiConfig
          ),
          goodsInfoApiConfig: normalizeAgentWorkflowGoodsInfoApiConfig(
            draft.state.goodsInfoApiConfig
          ),
          showcaseConfig: normalizeAgentWorkflowShowcaseConfig(draft.state.showcaseConfig),
          psdTextColorConfig: normalizeAgentPsdTextColorConfig(draft.state.psdTextColorConfig),
          psdTemplateSecondaryCategoryConfig: normalizeAgentPsdTemplateSecondaryCategoryConfig(
            draft.state.psdTemplateSecondaryCategoryConfig
          ),
          brandModelConfig: normalizeAgentWorkflowBrandModelConfig(draft.state.brandModelConfig),
        };
      } else {
        preserveAgentWorkflowSettingsDraftForRecovery(draft);
        setRecoverableDraftUpdatedAt(draft.updatedAt);
        removeAgentWorkflowSettingsDraft();
        toast.warning(
          draft.version === 1
            ? "检测到旧版本地草稿，已转存为恢复副本，不会自动覆盖服务器配置"
            : "服务器配置已有更新，已转存旧草稿为恢复副本，避免覆盖其他管理员保存的数据"
        );
      }
    }

    setPresetLibraryConfig(nextState.presetLibraryConfig);
    setConfig(nextState.config);
    setMaterialApiConfig(nextState.materialApiConfig);
    setGoodsInfoApiConfig(nextState.goodsInfoApiConfig);
    setShowcaseConfig(nextState.showcaseConfig);
    setPsdTextColorConfig(nextState.psdTextColorConfig);
    setPsdTemplateSecondaryCategoryConfig(nextState.psdTemplateSecondaryCategoryConfig);
    setBrandModelConfig(nextState.brandModelConfig);
    setExpandedWorkflowOptions({});
    setExpandedPresetLibraryNodes({});
    if (nextState.config.steps[0]) {
      setExpandedSteps(new Set([nextState.config.steps[0].key]));
    }

    if (restoredDraft) {
      setAutoDraftUpdatedAt(restoredDraft.updatedAt);
      setAutoDraftStatus("restored");
      toast.success("已恢复本地自动保存草稿，确认无误后点击保存配置写入服务器");
    } else {
      setAutoDraftUpdatedAt(null);
      setAutoDraftStatus("idle");
    }

    const preservedDraft = readPreservedAgentWorkflowSettingsDraftForRecovery();
    if (preservedDraft) {
      setRecoverableDraftUpdatedAt(preservedDraft.updatedAt);
    }

    const hydrationTimer = window.setTimeout(() => {
      isApplyingSettingsRef.current = false;
      hasHydratedSettingsRef.current = true;
    }, 0);

    return () => window.clearTimeout(hydrationTimer);
  }, [data]);

  useEffect(() => {
    if (!data || !hasHydratedSettingsRef.current) {
      return;
    }

    const latestServerState = createAgentWorkflowSettingsStateFromPayload(data);
    const latestServerSignature =
      createAgentWorkflowSettingsStateSignature(latestServerState);
    const baseSignature = serverDraftBaseSignatureRef.current;

    if (
      baseSignature &&
      latestServerSignature !== baseSignature &&
      !hasWarnedRemoteWorkflowUpdateRef.current
    ) {
      hasWarnedRemoteWorkflowUpdateRef.current = true;
      toast.warning(
        "服务器工作流配置已有新版本。当前页面不会自动覆盖你的编辑，保存时只会提交你改过的部分。"
      );
    }
  }, [data]);

  const brandStoreEntries = useMemo(
    () =>
      config.inputOptions?.brandStoreEntries ||
      defaultAgentWorkflowUiConfig.inputOptions?.brandStoreEntries ||
      [],
    [config.inputOptions?.brandStoreEntries]
  );
  const priceBandOptions = useMemo(
    () =>
      config.inputOptions?.priceBands ||
      defaultAgentWorkflowUiConfig.inputOptions?.priceBands ||
      [],
    [config.inputOptions?.priceBands]
  );
  const categoryLabels = useMemo(
    () => getAgentWorkflowCategoryLabels(config),
    [config]
  );
  const workflowConstraintSettings = useMemo(
    () => getAgentWorkflowConstraintSettings(config),
    [config]
  );
  const workflowPageFeatureSettings = useMemo(
    () => getAgentWorkflowPageFeatureSettings(config),
    [config]
  );
  const firstCategoryLabel = categoryLabels.firstCategory;
  const secondCategoryLabel = categoryLabels.secondCategory;
  const thirdCategoryLabel = categoryLabels.thirdCategory;
  const fourthCategoryLabel = categoryLabels.fourthCategory;
  const fifthCategoryLabel = categoryLabels.fifthCategory;
  const configuredBrands = useMemo(
    () => brandStoreEntries.map((entry) => entry.brandName),
    [brandStoreEntries]
  );
  const brandModelBrands = useMemo(() => {
    return Array.from(
      new Set([
        ...configuredBrands,
        ...brandModelConfig.entries.map((entry) => entry.brandName),
      ])
    ).sort((left, right) => left.localeCompare(right, "zh-CN"));
  }, [brandModelConfig.entries, configuredBrands]);
  const psdTextColorBrandOptions = useMemo(
    () =>
      Array.from(
        new Set([
          ...configuredBrands,
          ...(psdTextColorConfig.brandConfigs || []).map((entry) => entry.brandName),
        ])
      ).sort((left, right) => left.localeCompare(right, "zh-CN")),
    [configuredBrands, psdTextColorConfig.brandConfigs]
  );
  const selectedBrandPsdTextColorConfig = useMemo(
    () => resolveAgentPsdTextColorConfigForBrand(psdTextColorConfig, selectedPsdTextColorBrand),
    [psdTextColorConfig, selectedPsdTextColorBrand]
  );

  useEffect(() => {
    if (psdTextColorBrandOptions.length === 0) {
      if (selectedPsdTextColorBrand) {
        setSelectedPsdTextColorBrand("");
      }
      return;
    }

    const hasCurrentSelection = psdTextColorBrandOptions.some(
      (brandName) => brandName === selectedPsdTextColorBrand
    );
    if (!hasCurrentSelection) {
      setSelectedPsdTextColorBrand(psdTextColorBrandOptions[0] || "");
    }
  }, [psdTextColorBrandOptions, selectedPsdTextColorBrand]);

  const autoDraftState = useMemo<AgentWorkflowSettingsDraftState>(
    () => ({
      presetLibraryConfig,
      config,
      materialApiConfig,
      goodsInfoApiConfig,
      brandModelConfig,
      showcaseConfig,
      psdTextColorConfig,
      psdTemplateSecondaryCategoryConfig,
    }),
    [
      presetLibraryConfig,
      config,
      materialApiConfig,
      goodsInfoApiConfig,
      brandModelConfig,
      showcaseConfig,
      psdTextColorConfig,
      psdTemplateSecondaryCategoryConfig,
    ]
  );

  useEffect(() => {
    if (!hasHydratedSettingsRef.current || isApplyingSettingsRef.current) {
      return;
    }

    const draftTimer = window.setTimeout(() => {
      const updatedAt = Date.now();
      const cancelIdleDraft = scheduleWorkflowIdleTask(() => {
        try {
          writeAgentWorkflowSettingsDraft({
            version: 2,
            updatedAt,
            baseSignature:
              serverDraftBaseSignatureRef.current ||
              createAgentWorkflowSettingsStateSignature(autoDraftState),
            baseSignatures:
              serverDraftBaseSignaturesRef.current ||
              createAgentWorkflowSettingsSectionSignatures(autoDraftState),
            state: autoDraftState,
          });
          startTransition(() => {
            setAutoDraftUpdatedAt(updatedAt);
            setAutoDraftStatus("saved");
          });
        } catch {
          toast.error("本地自动保存失败，请及时手动保存配置");
        }
      });

      draftCancelRef.current = cancelIdleDraft;
    }, 1200);

    return () => {
      window.clearTimeout(draftTimer);
      draftCancelRef.current?.();
      draftCancelRef.current = null;
    };
  }, [autoDraftState]);

  const sortedSteps = useMemo(
    () => [...config.steps].sort((left, right) => left.sortOrder - right.sortOrder),
    [config.steps]
  );
  const deferredWorkflowSteps = useDeferredValue(config.steps);
  const sortedPresetLibrarySections = useMemo(
    () =>
      [...presetLibraryConfig.sections].sort((left, right) => left.sortOrder - right.sortOrder),
    [presetLibraryConfig.sections]
  );
  const workflowOptionRelations = useMemo(
    () => collectWorkflowOptionRelationsFromSteps(deferredWorkflowSteps || []),
    [deferredWorkflowSteps]
  );
  const workflowOptionRelationsByDepth = useMemo(() => {
    const next = new Map<number, WorkflowOptionRelation[]>();
    for (const relation of workflowOptionRelations) {
      const current = next.get(relation.depth) || [];
      current.push(relation);
      next.set(relation.depth, current);
    }
    return next;
  }, [workflowOptionRelations]);
  const workflowOptionRelationLookup = useMemo(
    () => new Map(workflowOptionRelations.map((item) => [item.key, item] as const)),
    [workflowOptionRelations]
  );
  const canPasteCopiedWorkflowStepAsRoot = Boolean(
    copiedWorkflowStep &&
      getWorkflowStepSubtreeDepth(copiedWorkflowStep) <= AGENT_WORKFLOW_MAX_TREE_DEPTH
  );
  const updateInputOptions = (nextEntries: AgentWorkflowBrandStoreEntry[]) => {
    setConfig((prev) => ({
      ...prev,
      inputOptions: buildWorkflowInputOptionsFromBrandEntries(
        nextEntries,
        prev.inputOptions?.priceBands || [],
        prev.inputOptions?.categoryLabels || categoryLabels
      ),
    }));
  };

  const normalizeInputOptionValue = (value: string) =>
    value
      .replace(/\s+/g, " ")
      .trim();

  const handleCategoryLabelChange = (
    key: keyof AgentWorkflowCategoryLabels,
    value: string
  ) => {
    const nextValue = normalizeInputOptionValue(value).slice(0, 24);
    setConfig((prev) => ({
      ...prev,
      inputOptions: buildWorkflowInputOptionsFromBrandEntries(
        prev.inputOptions?.brandStoreEntries || [],
        prev.inputOptions?.priceBands || [],
        {
          ...(prev.inputOptions?.categoryLabels || categoryLabels),
          [key]: nextValue || defaultAgentWorkflowCategoryLabels[key],
        }
      ),
    }));
  };

  const handleAddBrandEntry = () => {
    const nextValue = normalizeInputOptionValue(brandDraft);
    if (!nextValue) {
      toast.error(`请输入${firstCategoryLabel}名称`);
      return;
    }

    if (brandStoreEntries.some((item) => item.brandName.toLowerCase() === nextValue.toLowerCase())) {
      toast.error(`该${firstCategoryLabel}已存在`);
      return;
    }

    updateInputOptions([
      ...brandStoreEntries,
      {
        brandName: nextValue,
        stores: [],
        storeEntries: [],
        sortOrder: brandStoreEntries.length,
      },
    ]);
    setBrandDraft("");
  };

  const handleRemoveBrandEntry = (brandName: string) => {
    updateInputOptions(brandStoreEntries.filter((entry) => entry.brandName !== brandName));
    setStoreDrafts((prev) => {
      const next = { ...prev };
      delete next[brandName];
      return next;
    });
    setThirdCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::`)) {
          delete next[key];
        }
      });
      return next;
    });
    setFourthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::`)) {
          delete next[key];
        }
      });
      return next;
    });
    setFifthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::`)) {
          delete next[key];
        }
      });
      return next;
    });
  };

  const handleAddStoreToBrand = (brandName: string) => {
    const draft = storeDrafts[brandName] || "";
    const nextValue = normalizeInputOptionValue(draft);
    if (!nextValue) {
      toast.error(`请输入${secondCategoryLabel}名称`);
      return;
    }

    const targetEntry = brandStoreEntries.find((entry) => entry.brandName === brandName);
    if (
      targetEntry?.storeEntries?.some(
        (storeEntry) => storeEntry.storeName.toLowerCase() === nextValue.toLowerCase()
      ) ||
      targetEntry?.stores.some((store) => store.toLowerCase() === nextValue.toLowerCase())
    ) {
      toast.error(`该${secondCategoryLabel}已存在`);
      return;
    }

    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          stores: [...entry.stores, nextValue],
          storeEntries: [
            ...(entry.storeEntries || []).map((storeEntry, storeIndex) => ({
              ...storeEntry,
              sortOrder: storeIndex,
            })),
            {
              storeName: nextValue,
              thirdCategories: [],
              thirdCategoryEntries: [],
              sortOrder: (entry.storeEntries || []).length,
            },
          ],
        };
      })
    );
    setStoreDrafts((prev) => ({
      ...prev,
      [brandName]: "",
    }));
  };

  const handleRemoveStoreFromBrand = (brandName: string, storeName: string) => {
    updateInputOptions(
      brandStoreEntries.map((entry) =>
        entry.brandName === brandName
          ? {
              ...entry,
              stores: entry.stores.filter((store) => store !== storeName),
              storeEntries: (entry.storeEntries || []).filter(
                (storeEntry) => storeEntry.storeName !== storeName
              ),
            }
          : entry
      )
    );
    setThirdCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}`)) {
          delete next[key];
        }
      });
      return next;
    });
    setFourthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}`)) {
          delete next[key];
        }
      });
      return next;
    });
    setFifthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}`)) {
          delete next[key];
        }
      });
      return next;
    });
  };

  const handleClearBrandTree = () => {
    if (brandStoreEntries.length === 0) {
      toast.error("当前没有可清空的层级树数据");
      return;
    }

    const confirmed = window.confirm(
      `确认清空当前所有${firstCategoryLabel}/${secondCategoryLabel}及分类层级数据吗？此操作不会影响价格带和其它系统设置。`
    );
    if (!confirmed) {
      return;
    }

    updateInputOptions([]);
    setBrandDraft("");
    setStoreDrafts({});
    setThirdCategoryDrafts({});
    setFourthCategoryDrafts({});
    setFifthCategoryDrafts({});
    toast.success("层级树数据已清空，可重新导入表格");
  };

  const handleAddThirdCategoryToStore = (brandName: string, storeName: string) => {
    const draftKey = createStoreDraftKey(brandName, storeName);
    const nextValue = normalizeInputOptionValue(thirdCategoryDrafts[draftKey] || "");
    if (!nextValue) {
      toast.error(`请输入${thirdCategoryLabel}名称`);
      return;
    }

    const targetEntry = brandStoreEntries.find((entry) => entry.brandName === brandName);
    const targetStoreEntry = targetEntry?.storeEntries?.find(
      (storeEntry) => storeEntry.storeName === storeName
    );
    if (
      (targetStoreEntry?.thirdCategoryEntries || []).some(
        (thirdEntry) => thirdEntry.categoryName.toLowerCase() === nextValue.toLowerCase()
      ) ||
      targetStoreEntry?.thirdCategories.some(
        (thirdCategory) => thirdCategory.toLowerCase() === nextValue.toLowerCase()
      )
    ) {
      toast.error(`该${thirdCategoryLabel}已存在`);
      return;
    }

    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategories: [...(storeEntry.thirdCategories || []), nextValue],
                  thirdCategoryEntries: [
                    ...((storeEntry.thirdCategoryEntries || []).map((thirdEntry, thirdIndex) => ({
                      ...thirdEntry,
                      sortOrder: thirdIndex,
                    })) || []),
                    {
                      categoryName: nextValue,
                      fourthCategories: [],
                      fourthCategoryEntries: [],
                      sortOrder: (storeEntry.thirdCategoryEntries || []).length,
                    },
                  ],
                }
              : storeEntry
          ),
        };
      })
    );
    setThirdCategoryDrafts((prev) => ({
      ...prev,
      [draftKey]: "",
    }));
  };

  const handleRemoveThirdCategoryFromStore = (
    brandName: string,
    storeName: string,
    thirdCategory: string
  ) => {
    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategories: (storeEntry.thirdCategories || []).filter(
                    (item) => item !== thirdCategory
                  ),
                  thirdCategoryEntries: (storeEntry.thirdCategoryEntries || []).filter(
                    (item) => item.categoryName !== thirdCategory
                  ),
                }
              : storeEntry
          ),
        };
      })
    );
    setFourthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}::${thirdCategory}`)) {
          delete next[key];
        }
      });
      return next;
    });
    setFifthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}::${thirdCategory}`)) {
          delete next[key];
        }
      });
      return next;
    });
  };

  const handleAddFourthCategoryToThirdCategory = (
    brandName: string,
    storeName: string,
    thirdCategory: string
  ) => {
    const draftKey = createThirdCategoryDraftKey(brandName, storeName, thirdCategory);
    const nextValue = normalizeInputOptionValue(fourthCategoryDrafts[draftKey] || "");
    if (!nextValue) {
      toast.error(`请输入${fourthCategoryLabel}名称`);
      return;
    }

    const targetEntry = brandStoreEntries.find((entry) => entry.brandName === brandName);
    const targetStoreEntry = targetEntry?.storeEntries?.find(
      (storeEntry) => storeEntry.storeName === storeName
    );
    const targetThirdEntry = targetStoreEntry?.thirdCategoryEntries?.find(
      (thirdEntry) => thirdEntry.categoryName === thirdCategory
    );
    if (
      (targetThirdEntry?.fourthCategoryEntries || []).some(
        (fourthEntry) => fourthEntry.categoryName.toLowerCase() === nextValue.toLowerCase()
      ) ||
      (targetThirdEntry?.fourthCategories || []).some(
        (fourthCategory) => fourthCategory.toLowerCase() === nextValue.toLowerCase()
      )
    ) {
      toast.error(`该${fourthCategoryLabel}已存在`);
      return;
    }

    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategoryEntries: (storeEntry.thirdCategoryEntries || []).map((thirdEntry) =>
                    thirdEntry.categoryName === thirdCategory
                      ? {
                          ...thirdEntry,
                          fourthCategories: [...(thirdEntry.fourthCategories || []), nextValue],
                          fourthCategoryEntries: [
                            ...((thirdEntry.fourthCategoryEntries || []).map((fourthEntry, fourthIndex) => ({
                              ...fourthEntry,
                              sortOrder: fourthIndex,
                            })) || []),
                            {
                              categoryName: nextValue,
                              fifthCategories: [],
                              sortOrder: (thirdEntry.fourthCategoryEntries || []).length,
                            },
                          ],
                        }
                      : thirdEntry
                  ),
                }
              : storeEntry
          ),
        };
      })
    );
    setFourthCategoryDrafts((prev) => ({
      ...prev,
      [draftKey]: "",
    }));
  };

  const handleRemoveFourthCategoryFromThirdCategory = (
    brandName: string,
    storeName: string,
    thirdCategory: string,
    fourthCategory: string
  ) => {
    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategoryEntries: (storeEntry.thirdCategoryEntries || []).map((thirdEntry) =>
                    thirdEntry.categoryName === thirdCategory
                      ? {
                          ...thirdEntry,
                          fourthCategories: (thirdEntry.fourthCategories || []).filter(
                            (item) => item !== fourthCategory
                          ),
                          fourthCategoryEntries: (thirdEntry.fourthCategoryEntries || []).filter(
                            (item) => item.categoryName !== fourthCategory
                          ),
                        }
                      : thirdEntry
                  ),
                }
              : storeEntry
          ),
        };
      })
    );
    setFifthCategoryDrafts((prev) => {
      const next = { ...prev };
      Object.keys(next).forEach((key) => {
        if (key.startsWith(`${brandName}::${storeName}::${thirdCategory}::${fourthCategory}`)) {
          delete next[key];
        }
      });
      return next;
    });
  };

  const handleAddFifthCategoryToFourthCategory = (
    brandName: string,
    storeName: string,
    thirdCategory: string,
    fourthCategory: string
  ) => {
    const draftKey = createFourthCategoryDraftKey(
      brandName,
      storeName,
      thirdCategory,
      fourthCategory
    );
    const nextValue = normalizeInputOptionValue(fifthCategoryDrafts[draftKey] || "");
    if (!nextValue) {
      toast.error(`请输入${fifthCategoryLabel}名称`);
      return;
    }

    const targetEntry = brandStoreEntries.find((entry) => entry.brandName === brandName);
    const targetStoreEntry = targetEntry?.storeEntries?.find(
      (storeEntry) => storeEntry.storeName === storeName
    );
    const targetThirdEntry = targetStoreEntry?.thirdCategoryEntries?.find(
      (thirdEntry) => thirdEntry.categoryName === thirdCategory
    );
    const targetFourthEntry = targetThirdEntry?.fourthCategoryEntries?.find(
      (fourthEntry) => fourthEntry.categoryName === fourthCategory
    );
    if (
      targetFourthEntry?.fifthCategories.some(
        (fifthCategory) => fifthCategory.toLowerCase() === nextValue.toLowerCase()
      )
    ) {
      toast.error(`该${fifthCategoryLabel}已存在`);
      return;
    }

    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategoryEntries: (storeEntry.thirdCategoryEntries || []).map((thirdEntry) =>
                    thirdEntry.categoryName === thirdCategory
                      ? {
                          ...thirdEntry,
                          fourthCategoryEntries: (thirdEntry.fourthCategoryEntries || []).map(
                            (fourthEntry) =>
                              fourthEntry.categoryName === fourthCategory
                                ? {
                                    ...fourthEntry,
                                    fifthCategories: [...(fourthEntry.fifthCategories || []), nextValue],
                                  }
                                : fourthEntry
                          ),
                        }
                      : thirdEntry
                  ),
                }
              : storeEntry
          ),
        };
      })
    );
    setFifthCategoryDrafts((prev) => ({
      ...prev,
      [draftKey]: "",
    }));
  };

  const handleRemoveFifthCategoryFromFourthCategory = (
    brandName: string,
    storeName: string,
    thirdCategory: string,
    fourthCategory: string,
    fifthCategory: string
  ) => {
    updateInputOptions(
      brandStoreEntries.map((entry) => {
        if (entry.brandName !== brandName) return entry;
        return {
          ...entry,
          storeEntries: (entry.storeEntries || []).map((storeEntry) =>
            storeEntry.storeName === storeName
              ? {
                  ...storeEntry,
                  thirdCategoryEntries: (storeEntry.thirdCategoryEntries || []).map((thirdEntry) =>
                    thirdEntry.categoryName === thirdCategory
                      ? {
                          ...thirdEntry,
                          fourthCategoryEntries: (thirdEntry.fourthCategoryEntries || []).map(
                            (fourthEntry) =>
                              fourthEntry.categoryName === fourthCategory
                                ? {
                                    ...fourthEntry,
                                    fifthCategories: (fourthEntry.fifthCategories || []).filter(
                                      (item) => item !== fifthCategory
                                    ),
                                  }
                                : fourthEntry
                          ),
                        }
                      : thirdEntry
                  ),
                }
              : storeEntry
          ),
        };
      })
    );
  };

  const handleAddPriceBand = () => {
    const nextValue = normalizeInputOptionValue(priceBandDraft);
    if (!nextValue) {
      toast.error("请输入价格带区间");
      return;
    }

    if (priceBandOptions.some((item) => item.toLowerCase() === nextValue.toLowerCase())) {
      toast.error("该价格带已存在");
      return;
    }

    setConfig((prev) => ({
      ...prev,
      inputOptions: buildWorkflowInputOptionsFromBrandEntries(
        prev.inputOptions?.brandStoreEntries || [],
        [...(prev.inputOptions?.priceBands || []), nextValue],
        prev.inputOptions?.categoryLabels || categoryLabels
      ),
    }));
    setPriceBandDraft("");
  };

  const handleRemovePriceBand = (priceBand: string) => {
    setConfig((prev) => ({
      ...prev,
      inputOptions: buildWorkflowInputOptionsFromBrandEntries(
        prev.inputOptions?.brandStoreEntries || [],
        (prev.inputOptions?.priceBands || []).filter((item) => item !== priceBand),
        prev.inputOptions?.categoryLabels || categoryLabels
      ),
    }));
  };

  const enabledStepsCount = useMemo(
    () => flattenAgentWorkflowSteps(sortedSteps).filter(({ step }) => step.enabled).length,
    [sortedSteps]
  );
  const totalOptionsCount = useMemo(
    () =>
      flattenAgentWorkflowSteps(sortedSteps).reduce(
        (acc, { step }) => acc + step.options.filter((option) => option.enabled).length,
        0
      ),
    [sortedSteps]
  );
  const enabledPresetLibrarySectionCount = useMemo(
    () => sortedPresetLibrarySections.filter((section) => section.enabled).length,
    [sortedPresetLibrarySections]
  );
  const totalPresetLibraryNodeCount = useMemo(
    () =>
      sortedPresetLibrarySections.reduce(
        (total, section) => total + countPresetLibraryNodes(section.categories || []),
        0
      ),
    [sortedPresetLibrarySections]
  );

  const updatePresetLibrarySection = (
    sectionId: string,
    updater: (section: AgentPresetLibrarySection) => AgentPresetLibrarySection
  ) => {
    setPresetLibraryConfig((prev) => ({
      sections: prev.sections
        .map((section) => (section.id === sectionId ? updater(section) : section))
        .sort((left, right) => left.sortOrder - right.sortOrder)
        .map((section, index) => ({
          ...section,
          sortOrder: index,
        })),
    }));
  };

  const handleAddPresetLibrarySection = () => {
    setPresetLibraryConfig((prev) => {
      const nextSection = createPresetLibrarySectionDraft(
        prev.sections.length,
        prev.sections.map((section) => section.id)
      );
      return {
        sections: [...prev.sections, nextSection].map((section, index) => ({
          ...section,
          sortOrder: index,
        })),
      };
    });
    setActiveTab("categories");
  };

  const handleRemovePresetLibrarySection = (sectionId: string) => {
    setPresetLibraryConfig((prev) => ({
      sections: prev.sections
        .filter((section) => section.id !== sectionId)
        .map((section, index) => ({
          ...section,
          sortOrder: index,
        })),
    }));
  };

  const handleAddPresetLibraryNode = (sectionId: string, parentNodeId?: string) => {
    setPresetLibraryConfig((prev) => {
      const targetSection = prev.sections.find((section) => section.id === sectionId);
      if (!targetSection) return prev;

      const existingNodeIds = collectPresetLibraryNodeIds(targetSection.categories || []);
      const nextSections = prev.sections.map((section) => {
        if (section.id !== sectionId) return section;

        if (!parentNodeId) {
          return {
            ...section,
            categories: [
              ...(section.categories || []),
              createPresetLibraryNodeDraft(1, (section.categories || []).length, existingNodeIds),
            ].map((node, index) => ({
              ...node,
              sortOrder: index,
            })),
          };
        }

        const resolveDepth = (
          nodes: AgentPresetLibraryCategoryNode[],
          depth: number
        ): number | null => {
          for (const node of nodes) {
            if (node.id === parentNodeId) return depth;
            const childDepth = resolveDepth(node.children || [], depth + 1);
            if (childDepth) return childDepth;
          }
          return null;
        };

        const parentNode = findPresetLibraryNodeById(section.categories || [], parentNodeId);
        const parentDepth = resolveDepth(section.categories || [], 1);
        if (!parentNode || !parentDepth || parentDepth >= AGENT_PRESET_LIBRARY_MAX_DEPTH) {
          return section;
        }

        return {
          ...section,
          categories: updatePresetLibraryNodeTree(
            section.categories || [],
            parentNodeId,
            (node) => ({
              ...node,
              children: [
                ...(node.children || []),
                createPresetLibraryNodeDraft(
                  parentDepth + 1,
                  (node.children || []).length,
                  existingNodeIds
                ),
              ].map((child, index) => ({
                ...child,
                sortOrder: index,
              })),
            })
          ),
        };
      });

      return { sections: nextSections };
    });
    setActiveTab("categories");
  };

  const handleRemovePresetLibraryNode = (sectionId: string, nodeId: string) => {
    setPresetLibraryConfig((prev) => ({
      sections: prev.sections.map((section) => {
        if (section.id !== sectionId) return section;
        return {
          ...section,
          categories: removePresetLibraryNodeTree(section.categories || [], nodeId).map(
            (node, index) => ({
              ...node,
              sortOrder: index,
            })
          ),
        };
      }),
    }));
  };

  const updatePresetLibraryNode = (
    sectionId: string,
    nodeId: string,
    updater: (node: AgentPresetLibraryCategoryNode) => AgentPresetLibraryCategoryNode
  ) => {
    setPresetLibraryConfig((prev) => ({
      sections: prev.sections.map((section) => {
        if (section.id !== sectionId) return section;
        return {
          ...section,
          categories: updatePresetLibraryNodeTree(section.categories || [], nodeId, updater),
        };
      }),
    }));
  };

  const toggleStepExpansion = (stepKey: string) => {
    setExpandedSteps((prev) => {
      const next = new Set(prev);
      if (next.has(stepKey)) {
        next.delete(stepKey);
      } else {
        next.add(stepKey);
      }
      return next;
    });
  };

  const isWorkflowOptionExpanded = (optionKey: string, depth: number) =>
    expandedWorkflowOptions[optionKey] ?? depth === 1;

  const toggleWorkflowOptionExpansion = (optionKey: string, depth: number) => {
    setExpandedWorkflowOptions((prev) => ({
      ...prev,
      [optionKey]: !(prev[optionKey] ?? depth === 1),
    }));
  };

  const isPresetLibraryNodeExpanded = (nodeId: string, depth: number) =>
    expandedPresetLibraryNodes[nodeId] ?? depth === 1;

  const togglePresetLibraryNodeExpansion = (nodeId: string, depth: number) => {
    setExpandedPresetLibraryNodes((prev) => ({
      ...prev,
      [nodeId]: !(prev[nodeId] ?? depth === 1),
    }));
  };

  const updateStep = (
    stepKey: string,
    updater: (step: AgentWorkflowUiConfig["steps"][number]) => AgentWorkflowUiConfig["steps"][number]
  ) => {
    setConfig((prev) => ({
      ...prev,
      steps: updateWorkflowStepTree(prev.steps, stepKey, updater),
    }));
  };

  const updateOption = (
    stepKey: string,
    optionKey: string,
    updater: (
      option: AgentWorkflowUiConfig["steps"][number]["options"][number]
    ) => AgentWorkflowUiConfig["steps"][number]["options"][number]
  ) => {
    updateStep(stepKey, (step) => ({
      ...step,
      options: updateWorkflowOptionTree(step.options, optionKey, updater),
    }));
  };

  const handleAddStep = () => {
    setConfig((prev) => {
      const existingStepKeys = collectWorkflowStepKeys(prev.steps);
      const newStep = createWorkflowStepDraft(1, prev.steps.length, existingStepKeys);
      setExpandedSteps((prevExpanded) => new Set([...prevExpanded, newStep.key]));
      return normalizeConfigOrdering({
        ...prev,
        steps: [...prev.steps, newStep],
      });
    });
    setActiveTab("workflow");
  };

  const handleAddChildStep = (parentStepKey: string, parentDepth: number) => {
    if (parentDepth >= AGENT_WORKFLOW_MAX_TREE_DEPTH) {
      toast.error(`模块层级最多支持 ${AGENT_WORKFLOW_MAX_TREE_DEPTH} 级`);
      return;
    }

    let newStepKey = "";
    setConfig((prev) => {
      const parentStep = findAgentWorkflowStepByKey(prev.steps, parentStepKey);
      if (!parentStep) {
        return prev;
      }

      const existingStepKeys = collectWorkflowStepKeys(prev.steps);
      const newStep = createWorkflowStepDraft(
        parentDepth + 1,
        (parentStep.children || []).length,
        existingStepKeys
      );
      newStepKey = newStep.key;
      return normalizeConfigOrdering({
        ...prev,
        steps: updateWorkflowStepTree(prev.steps, parentStepKey, (step) => ({
          ...step,
          children: [...(step.children || []), newStep],
        })),
      });
    });

    if (newStepKey) {
      setExpandedSteps((prevExpanded) => new Set([...prevExpanded, parentStepKey, newStepKey]));
    }
  };

  const handleRemoveStep = (stepKey: string) => {
    const targetStep = findAgentWorkflowStepByKey(config.steps, stepKey);
    setConfig((prev) =>
      normalizeConfigOrdering({
        ...prev,
        steps: removeWorkflowStepTree(prev.steps, stepKey),
      })
    );
    setExpandedSteps((prev) => {
      const next = new Set(prev);
      for (const key of targetStep ? collectDescendantStepKeys(targetStep) : [stepKey]) {
        next.delete(key);
      }
      return next;
    });
  };

  const canMoveWorkflowStep = (
    sourceStepKey: string | null,
    targetStepKey: string | null,
    position: WorkflowStepDropPosition
  ) => {
    if (!sourceStepKey) {
      return false;
    }

    const sourceStep = findAgentWorkflowStepByKey(config.steps, sourceStepKey);
    if (!sourceStep || sourceStepKey === targetStepKey) {
      return false;
    }

    if (isWorkflowStepTargetInsideSource(sourceStep, targetStepKey)) {
      return false;
    }

    const insertionDepth = getWorkflowStepInsertionDepth(config.steps, targetStepKey, position);
    if (!insertionDepth) {
      return false;
    }

    return insertionDepth + getWorkflowStepSubtreeDepth(sourceStep) - 1 <= AGENT_WORKFLOW_MAX_TREE_DEPTH;
  };

  const handleMoveWorkflowStep = (
    sourceStepKey: string,
    targetStepKey: string | null,
    position: WorkflowStepDropPosition
  ) => {
    let moved = false;
    let failureMessage = "无法移动到这个位置";

    setConfig((prev) => {
      const sourceStep = findAgentWorkflowStepByKey(prev.steps, sourceStepKey);
      if (!sourceStep) {
        failureMessage = "找不到要移动的模块";
        return prev;
      }

      if (sourceStepKey === targetStepKey || isWorkflowStepTargetInsideSource(sourceStep, targetStepKey)) {
        failureMessage = "不能把模块移动到自己或自己的子模块下面";
        return prev;
      }

      const insertionDepth = getWorkflowStepInsertionDepth(prev.steps, targetStepKey, position);
      if (!insertionDepth) {
        failureMessage = "找不到目标模块";
        return prev;
      }

      if (
        insertionDepth + getWorkflowStepSubtreeDepth(sourceStep) - 1 >
        AGENT_WORKFLOW_MAX_TREE_DEPTH
      ) {
        failureMessage = `模块层级最多支持 ${AGENT_WORKFLOW_MAX_TREE_DEPTH} 级`;
        return prev;
      }

      const removalResult = extractWorkflowStepFromTree(prev.steps, sourceStepKey);
      if (!removalResult.extractedStep) {
        return prev;
      }

      const insertionResult = insertWorkflowStepIntoTree(
        removalResult.steps,
        targetStepKey,
        position,
        removalResult.extractedStep
      );
      if (!insertionResult.inserted) {
        failureMessage = "没有找到可放置的目标位置";
        return prev;
      }

      moved = true;
      return normalizeConfigOrdering({
        ...prev,
        steps: insertionResult.steps,
      });
    });

    if (!moved) {
      toast.error(failureMessage);
      return;
    }

    setExpandedSteps((prev) => {
      const next = new Set(prev);
      next.add(sourceStepKey);
      if (targetStepKey && position === "inside") {
        next.add(targetStepKey);
      }
      return next;
    });
  };

  const handleWorkflowStepDragStart = (
    event: DragEvent<HTMLElement>,
    stepKey: string
  ) => {
    setDraggedStepKey(stepKey);
    event.dataTransfer.effectAllowed = "move";
    event.dataTransfer.setData(WORKFLOW_STEP_DRAG_DATA_TYPE, stepKey);
  };

  const handleWorkflowStepDragOver = (
    event: DragEvent<HTMLElement>,
    targetStepKey: string | null,
    position: WorkflowStepDropPosition
  ) => {
    const sourceStepKey = draggedStepKey;
    if (!sourceStepKey || !canMoveWorkflowStep(sourceStepKey, targetStepKey, position)) {
      return;
    }

    event.preventDefault();
    event.stopPropagation();
    event.dataTransfer.dropEffect = "move";
    setStepDropTarget({ stepKey: targetStepKey, position });
  };

  const handleWorkflowStepDrop = (
    event: DragEvent<HTMLElement>,
    targetStepKey: string | null,
    position: WorkflowStepDropPosition
  ) => {
    event.preventDefault();
    event.stopPropagation();

    const sourceStepKey =
      draggedStepKey || event.dataTransfer.getData(WORKFLOW_STEP_DRAG_DATA_TYPE);
    setStepDropTarget(null);
    setDraggedStepKey(null);
    if (!sourceStepKey) {
      return;
    }

    handleMoveWorkflowStep(sourceStepKey, targetStepKey, position);
  };

  const handleWorkflowStepDragEnd = () => {
    setDraggedStepKey(null);
    setStepDropTarget(null);
  };

  const handleCopyWorkflowStep = (stepKey: string) => {
    const targetStep = findAgentWorkflowStepByKey(config.steps, stepKey);
    if (!targetStep) {
      toast.error("找不到要复制的模块");
      return;
    }

    setCopiedWorkflowStep(cloneWorkflowStepSnapshot(targetStep));
    toast.success(`已复制模块「${targetStep.title || targetStep.key}」及其子模块`);
  };

  const handlePasteWorkflowStep = (targetStepKey: string | null) => {
    if (!copiedWorkflowStep) {
      toast.error("请先复制一个模块");
      return;
    }

    let pastedStepKey = "";
    let failureMessage = "无法粘贴到这个位置";

    setConfig((prev) => {
      const insertionDepth = getWorkflowStepInsertionDepth(prev.steps, targetStepKey, "inside");
      if (!insertionDepth) {
        failureMessage = "找不到目标模块";
        return prev;
      }

      if (
        insertionDepth + getWorkflowStepSubtreeDepth(copiedWorkflowStep) - 1 >
        AGENT_WORKFLOW_MAX_TREE_DEPTH
      ) {
        failureMessage = `粘贴后会超过 ${AGENT_WORKFLOW_MAX_TREE_DEPTH} 级模块限制`;
        return prev;
      }

      const pastedStep = cloneWorkflowStepForPaste(
        copiedWorkflowStep,
        new Set(collectWorkflowStepKeys(prev.steps)),
        new Set(collectWorkflowOptionKeysFromSteps(prev.steps))
      );
      pastedStepKey = pastedStep.key;
      const insertionResult = insertWorkflowStepIntoTree(
        prev.steps,
        targetStepKey,
        "inside",
        pastedStep
      );

      if (!insertionResult.inserted) {
        return prev;
      }

      return normalizeConfigOrdering({
        ...prev,
        steps: insertionResult.steps,
      });
    });

    if (!pastedStepKey) {
      toast.error(failureMessage);
      return;
    }

    setExpandedSteps((prev) => {
      const next = new Set(prev);
      next.add(pastedStepKey);
      if (targetStepKey) {
        next.add(targetStepKey);
      }
      return next;
    });
    toast.success("已粘贴模块副本");
  };

  const handleAddOption = (stepKey: string, parentOptionKey?: string) => {
    updateStep(stepKey, (step) => {
      const existingOptionKeys = collectWorkflowOptionKeys(step.options || []);
      if (!parentOptionKey) {
        return {
          ...step,
          options: normalizeAgentWorkflowOptionOrdering([
            ...step.options,
            createWorkflowOptionDraft(step.key, step.options.length, existingOptionKeys),
          ]),
        };
      }

      const parentOption = findAgentWorkflowOptionByKey(step.options || [], parentOptionKey);
      const parentDepth = flattenAgentWorkflowOptionTree(step.options || []).find(
        ({ option }) => option.key === parentOptionKey
      )?.depth;
      if (!parentOption || !parentDepth || parentDepth >= AGENT_WORKFLOW_MAX_OPTION_DEPTH) {
        return step;
      }

      return {
        ...step,
        options: updateWorkflowOptionTree(step.options || [], parentOptionKey, (option) => ({
          ...option,
          children: normalizeAgentWorkflowOptionOrdering([
            ...(option.children || []),
            createWorkflowOptionDraft(
              step.key,
              (option.children || []).length,
              existingOptionKeys
            ),
          ]),
        })),
      };
    });
  };

  const handleRemoveOption = (stepKey: string, optionKey: string) => {
    updateStep(stepKey, (step) => ({
      ...step,
      options: normalizeAgentWorkflowOptionOrdering(
        removeWorkflowOptionTree(step.options, optionKey)
      ),
    }));
  };

  const handleMoveRootOption = (stepKey: string, optionKey: string, direction: "up" | "down") => {
    updateStep(stepKey, (step) => {
      const sortedRootOptions = [...(step.options || [])].sort(
        (left, right) => left.sortOrder - right.sortOrder
      );
      const currentIndex = sortedRootOptions.findIndex((option) => option.key === optionKey);
      if (currentIndex < 0) {
        return step;
      }

      const targetIndex = direction === "up" ? currentIndex - 1 : currentIndex + 1;
      if (targetIndex < 0 || targetIndex >= sortedRootOptions.length) {
        return step;
      }

      return {
        ...step,
        options: moveArrayItem(sortedRootOptions, currentIndex, targetIndex).map(
          (option, index) => ({
            ...option,
            sortOrder: index,
          })
        ),
      };
    });
  };

  const handleMoveTopLevelStep = (stepKey: string, direction: "up" | "down") => {
    setConfig((prev) => {
      const sortedRootSteps = [...prev.steps].sort((left, right) => left.sortOrder - right.sortOrder);
      const currentIndex = sortedRootSteps.findIndex((step) => step.key === stepKey);
      if (currentIndex < 0) {
        return prev;
      }

      const targetIndex = direction === "up" ? currentIndex - 1 : currentIndex + 1;
      if (targetIndex < 0 || targetIndex >= sortedRootSteps.length) {
        return prev;
      }

      return normalizeConfigOrdering({
        ...prev,
        steps: moveArrayItem(sortedRootSteps, currentIndex, targetIndex).map((step, index) => ({
          ...step,
          sortOrder: index,
        })),
      });
    });
  };

  const handleUploadPreview = async (stepKey: string, optionKey: string, file: File) => {
    if (!file.type.startsWith("image/")) {
      toast.error("请上传图片文件");
      return;
    }

    const refKey = `${stepKey}:${optionKey}`;
    try {
      setUploadingKey(refKey);
      const formData = new FormData();
      formData.append("file", file);

      const response = await fetchUploadWithRetry(formData);
      const result = await response.json();

      if (!response.ok || !result?.url) {
        throw new Error(result?.error || "上传失败");
      }

      updateOption(stepKey, optionKey, (option) => ({
        ...option,
        previewImageUrl: result.url,
      }));
      toast.success("预览图上传成功");
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "预览图上传失败");
    } finally {
      setUploadingKey(null);
    }
  };

  const updateSelectedBrandPsdTextColorConfig = (
    updater: (current: AgentPsdTextColorBrandConfig | AgentPsdTextColorConfig) => {
      enabled: boolean;
      colors: [string, string];
    }
  ) => {
    if (!selectedPsdTextColorBrand) {
      setPsdTextColorConfig((prev) => {
        const next = updater(prev);
        return {
          ...prev,
          enabled: next.enabled,
          colors: next.colors,
        };
      });
      return;
    }

    setPsdTextColorConfig((prev) => {
      const nextBrandConfigs = [...(prev.brandConfigs || [])];
      const matchedIndex = nextBrandConfigs.findIndex(
        (entry) =>
          entry.brandName.trim().toLowerCase() ===
          selectedPsdTextColorBrand.trim().toLowerCase()
      );
      const currentBrandConfig =
        matchedIndex >= 0
          ? nextBrandConfigs[matchedIndex]
          : resolveAgentPsdTextColorConfigForBrand(prev, selectedPsdTextColorBrand);
      const next = updater(currentBrandConfig);
      const nextEntry: AgentPsdTextColorBrandConfig = {
        brandName: selectedPsdTextColorBrand,
        enabled: next.enabled,
        colors: next.colors,
      };

      if (matchedIndex >= 0) {
        nextBrandConfigs[matchedIndex] = nextEntry;
      } else {
        nextBrandConfigs.push(nextEntry);
      }

      return {
        ...prev,
        brandConfigs: nextBrandConfigs.sort((left, right) =>
          left.brandName.localeCompare(right.brandName, "zh-CN")
        ),
      };
    });
  };

  const updatePsdTextColor = (index: 0 | 1, value: string) => {
    const normalized = normalizeHexColor(
      value,
      selectedBrandPsdTextColorConfig.colors[index] || "#111111"
    );
    updateSelectedBrandPsdTextColorConfig((current) => {
      const nextColors = [...current.colors] as [string, string];
      nextColors[index] = normalized;
      return {
        enabled: current.enabled,
        colors: nextColors,
      };
    });
  };

  const handleRestorePreservedDraft = () => {
    const draft =
      readPreservedAgentWorkflowSettingsDraftForRecovery() ||
      readAgentWorkflowSettingsDraft();
    if (!draft) {
      setRecoverableDraftUpdatedAt(null);
      toast.error(
        "当前浏览器没有找到可恢复旧草稿。可能是旧版本已删除、已清理缓存，或不是原来编辑的浏览器。"
      );
      return;
    }

    const nextState: AgentWorkflowSettingsDraftState = {
      presetLibraryConfig: normalizeAgentPresetLibraryConfig(draft.state.presetLibraryConfig),
      config: normalizeConfigOrdering(normalizeAgentWorkflowUiConfig(draft.state.config)),
      materialApiConfig: normalizeAgentWorkflowMaterialApiConfig(
        draft.state.materialApiConfig
      ),
      goodsInfoApiConfig: normalizeAgentWorkflowGoodsInfoApiConfig(
        draft.state.goodsInfoApiConfig
      ),
      showcaseConfig: normalizeAgentWorkflowShowcaseConfig(draft.state.showcaseConfig),
      psdTextColorConfig: normalizeAgentPsdTextColorConfig(draft.state.psdTextColorConfig),
      psdTemplateSecondaryCategoryConfig: normalizeAgentPsdTemplateSecondaryCategoryConfig(
        draft.state.psdTemplateSecondaryCategoryConfig
      ),
      brandModelConfig: normalizeAgentWorkflowBrandModelConfig(draft.state.brandModelConfig),
    };

    setPresetLibraryConfig(nextState.presetLibraryConfig);
    setConfig(nextState.config);
    setMaterialApiConfig(nextState.materialApiConfig);
    setGoodsInfoApiConfig(nextState.goodsInfoApiConfig);
    setShowcaseConfig(nextState.showcaseConfig);
    setPsdTextColorConfig(nextState.psdTextColorConfig);
    setPsdTemplateSecondaryCategoryConfig(nextState.psdTemplateSecondaryCategoryConfig);
    setBrandModelConfig(nextState.brandModelConfig);
    if (nextState.config.steps[0]) {
      setExpandedSteps(new Set([nextState.config.steps[0].key]));
    }
    setAutoDraftUpdatedAt(Date.now());
    setAutoDraftStatus("restored");
    toast.success("已把旧草稿恢复到当前页面，确认无误后点击保存配置写入服务器");
  };

  const handleSave = async () => {
    try {
      setIsSaving(true);
      const latestSettingsResponse = await fetch("/api/site-settings", {
        cache: "no-store",
      });

      if (!latestSettingsResponse.ok) {
        throw new Error("保存前校验服务器配置失败，请刷新页面后重试");
      }

      const latestSettings =
        (await latestSettingsResponse.json()) as AgentWorkflowSettingsPayload;
      const latestServerState = createAgentWorkflowSettingsStateFromPayload(latestSettings);
      const latestServerSignatures =
        createAgentWorkflowSettingsSectionSignatures(latestServerState);
      const baseSignatures =
        serverDraftBaseSignaturesRef.current ||
        createAgentWorkflowSettingsSectionSignatures(latestServerState);
      const currentSignatures =
        createAgentWorkflowSettingsSectionSignatures(autoDraftState);
      const changedEntries = getAgentWorkflowSettingsPayloadEntries(autoDraftState).filter(
        ({ field }) => currentSignatures[field] !== baseSignatures[field]
      );

      if (changedEntries.length === 0) {
        removeAgentWorkflowSettingsDraft();
        setAutoDraftUpdatedAt(null);
        setAutoDraftStatus("idle");
        toast.success("没有检测到需要保存的修改");
        return;
      }

      const conflictedFields = changedEntries
        .filter(({ field }) => latestServerSignatures[field] !== baseSignatures[field])
        .map(({ field }) => AGENT_WORKFLOW_SETTINGS_FIELD_LABELS[field]);

      if (conflictedFields.length > 0) {
        toast.error(
          `以下配置已被其他管理员更新，本次保存已阻止：${conflictedFields.join("、")}。请刷新页面确认后再保存。`
        );
        return;
      }

      const changedPayload: Partial<AgentWorkflowSettingsPayload> & {
        agentWorkflowSettingsBaseSignatures: Partial<
          Record<AgentWorkflowSettingsField, string>
        >;
      } = {
        agentWorkflowSettingsBaseSignatures: {},
      };

      for (const { field, value } of changedEntries) {
        changedPayload[field] = value as never;
        changedPayload.agentWorkflowSettingsBaseSignatures[field] = baseSignatures[field];
      }

      const response = await fetch("/api/site-settings", {
        method: "PUT",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(changedPayload),
      });

      if (!response.ok) {
        let message = "保存失败";

        try {
          const payload = await response.json();
          if (Array.isArray(payload?.details) && payload.details.length > 0) {
            const firstIssue = payload.details[0] as {
              message?: string;
              path?: Array<string | number>;
            };
            const pathText =
              Array.isArray(firstIssue.path) && firstIssue.path.length > 0
                ? firstIssue.path
                    .filter((segment) => segment !== undefined && segment !== null && segment !== "")
                    .join(" / ")
                : "";
            const reasonText = String(firstIssue.message || "").trim();

            message = [payload?.error, pathText, reasonText].filter(Boolean).join("：");
          } else if (typeof payload?.error === "string" && payload.error.trim()) {
            message = payload.error.trim();
          }
        } catch {
          // Ignore JSON parsing issues and keep the generic message.
        }

        throw new Error(message);
      }

      const updatedSettings = await mutate();
      const savedWorkflowConfig = normalizeAgentWorkflowUiConfig(
        updatedSettings?.agentWorkflowUiConfig
      );
      const expectedStepCount = countAgentWorkflowSteps(config.steps || []);
      const savedStepCount = countAgentWorkflowSteps(savedWorkflowConfig.steps || []);
      const savedWorkflowConfigWasChanged = changedEntries.some(
        ({ field }) => field === "agentWorkflowUiConfig"
      );
      if (savedWorkflowConfigWasChanged && savedStepCount !== expectedStepCount) {
        toast.error(
          `服务端回读到的模块数量不一致（本地 ${expectedStepCount} / 服务端 ${savedStepCount}），已保留本地自动草稿，请先不要刷新页面。`
        );
        return;
      }

      const updatedServerState = createAgentWorkflowSettingsStateFromPayload(
        updatedSettings || latestSettings
      );
      serverDraftBaseSignatureRef.current =
        createAgentWorkflowSettingsStateSignature(updatedServerState);
      serverDraftBaseSignaturesRef.current =
        createAgentWorkflowSettingsSectionSignatures(updatedServerState);
      hasWarnedRemoteWorkflowUpdateRef.current = false;
      removeAgentWorkflowSettingsDraft();
      setAutoDraftUpdatedAt(null);
      setAutoDraftStatus("idle");
      toast.success(
        `已保存 ${changedEntries
          .map(({ field }) => AGENT_WORKFLOW_SETTINGS_FIELD_LABELS[field])
          .join("、")}`
      );
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "保存失败");
    } finally {
      setIsSaving(false);
    }
  };

  const handleDownloadBrandTemplate = async () => {
    try {
      await downloadAgentWorkflowBrandImportTemplate(categoryLabels);
      toast.success("层级导入模板已开始下载");
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "下载模板失败");
    }
  };

  const handleBrandSheetImport = async (event: ChangeEvent<HTMLInputElement>) => {
    const file = event.target.files?.[0];
    event.target.value = "";
    if (!file) {
      return;
    }

    try {
      setIsImportingBrandSheet(true);
      const { entries, rowCount } = await parseAgentWorkflowBrandImportFile(file, categoryLabels);
      updateInputOptions([...brandStoreEntries, ...entries]);
      toast.success(`已从表格导入 ${rowCount} 行，层级树已自动合并去重`);
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "导入表格失败");
    } finally {
      setIsImportingBrandSheet(false);
    }
  };

  const renderPresetLibraryNodeCard = (
    sectionId: string,
    node: AgentPresetLibraryCategoryNode,
    depth: number,
    indexPath: number[]
  ): React.ReactNode => {
    const levelLabel =
      PRESET_LIBRARY_LEVEL_LABELS[Math.max(0, Math.min(depth - 1, PRESET_LIBRARY_LEVEL_LABELS.length - 1))] ||
      `第 ${depth} 级分类`;
    const canAddChild = depth < AGENT_PRESET_LIBRARY_MAX_DEPTH;
    const sortedChildren = [...(node.children || [])].sort(
      (left, right) => left.sortOrder - right.sortOrder
    );
    const isExpanded = isPresetLibraryNodeExpanded(node.id, depth);

    return (
      <div key={node.id} className={cn("space-y-3", depth > 1 && "pl-4 sm:pl-6")}>
        <Collapsible
          open={isExpanded}
          onOpenChange={() => togglePresetLibraryNodeExpansion(node.id, depth)}
        >
          <Card className={cn(!node.enabled && "opacity-60", depth > 1 && "border-l-4 border-l-sky-500/30")}>
            <CardHeader className="py-4">
              <div className="flex flex-col gap-3 lg:flex-row lg:items-center lg:justify-between">
                <div className="flex min-w-0 items-center gap-3">
                  <CollapsibleTrigger asChild>
                    <button
                      type="button"
                      className="flex h-8 w-8 items-center justify-center rounded-md hover:bg-muted"
                      aria-label={isExpanded ? "收起分类配置" : "展开分类配置"}
                    >
                      {isExpanded ? (
                        <ChevronDown className="h-4 w-4" />
                      ) : (
                        <ChevronRight className="h-4 w-4" />
                      )}
                    </button>
                  </CollapsibleTrigger>
                  <div className="flex h-9 min-w-9 items-center justify-center rounded-md bg-sky-500/10 px-2 text-xs font-medium text-sky-600">
                    {indexPath.join(".")}
                  </div>
                  <div className="min-w-0 flex-1 space-y-2">
                    <div className="flex flex-wrap items-center gap-2">
                      <Input
                        value={node.name}
                        onChange={(e) =>
                          updatePresetLibraryNode(sectionId, node.id, (currentNode) => ({
                            ...currentNode,
                            name: e.target.value,
                          }))
                        }
                        className="h-8 min-w-[200px] max-w-[320px] border-0 bg-transparent px-0 text-base font-medium shadow-none focus-visible:ring-0"
                        placeholder="分类名称"
                      />
                      <Badge variant="outline">{levelLabel}</Badge>
                      <code className="rounded bg-muted px-1.5 py-0.5 text-xs text-muted-foreground">
                        {node.id}
                      </code>
                    </div>
                  </div>
                </div>

                <div className="flex flex-wrap items-center gap-2">
                  <Badge variant="secondary">{sortedChildren.length} 子分类</Badge>
                  {canAddChild ? (
                    <Button
                      type="button"
                      variant="outline"
                      size="sm"
                      onClick={() => handleAddPresetLibraryNode(sectionId, node.id)}
                    >
                      <Plus className="mr-2 h-4 w-4" />
                      新增子级
                    </Button>
                  ) : (
                    <Badge variant="outline">已达三级</Badge>
                  )}
                  <Switch
                    checked={node.enabled}
                    onCheckedChange={(checked) =>
                      updatePresetLibraryNode(sectionId, node.id, (currentNode) => ({
                        ...currentNode,
                        enabled: checked,
                      }))
                    }
                  />
                  <Button
                    type="button"
                    variant="ghost"
                    size="icon"
                    className="h-8 w-8 text-destructive"
                    onClick={() => handleRemovePresetLibraryNode(sectionId, node.id)}
                  >
                    <Trash2 className="h-4 w-4" />
                  </Button>
                </div>
              </div>
            </CardHeader>

            <CollapsibleContent>
              <CardContent className="border-t bg-muted/20 pt-4">
                {sortedChildren.length > 0 ? (
                  <div className="space-y-4 border-l border-dashed border-border/80 pl-3 sm:pl-4">
                    {sortedChildren.map((childNode, childIndex) =>
                      renderPresetLibraryNodeCard(sectionId, childNode, depth + 1, [
                        ...indexPath,
                        childIndex + 1,
                      ])
                    )}
                  </div>
                ) : (
                  <div className="rounded-lg border border-dashed bg-background/60 px-4 py-6 text-center text-sm text-muted-foreground">
                    暂无子分类
                  </div>
                )}
              </CardContent>
            </CollapsibleContent>
          </Card>
        </Collapsible>
      </div>
    );
  };

  const renderPresetLibrarySectionCard = (
    section: AgentPresetLibrarySection,
    index: number
  ) => {
    const sortedCategories = [...(section.categories || [])].sort(
      (left, right) => left.sortOrder - right.sortOrder
    );

    return (
      <motion.div key={section.id} variants={itemVariants}>
        <Card className={!section.enabled ? "opacity-70" : undefined}>
          <CardHeader className="pb-4">
            <div className="flex flex-col gap-4 lg:flex-row lg:items-start lg:justify-between">
              <div className="space-y-3">
                <div className="flex items-center gap-3">
                  <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-sky-500/10 text-sm font-semibold text-sky-600">
                    {index + 1}
                  </div>
                  <div>
                    <CardTitle className="text-base">顶部分类页</CardTitle>
                    <CardDescription>
                      “我的模式”固定保留，这里维护其余可显示的生图模式分类页与三级分类树。
                    </CardDescription>
                  </div>
                </div>

                <div className="grid gap-3 md:grid-cols-[minmax(220px,280px)_1fr]">
                  <div className="space-y-2">
                    <Label className="text-xs">分类页名称</Label>
                    <Input
                      value={section.label}
                      onChange={(e) =>
                        updatePresetLibrarySection(section.id, (currentSection) => ({
                          ...currentSection,
                          label: e.target.value,
                        }))
                      }
                      placeholder="例如：案例广场"
                    />
                  </div>
                  <div className="space-y-2">
                    <Label className="text-xs">说明文案</Label>
                    <Input
                      value={section.description || ""}
                      onChange={(e) =>
                        updatePresetLibrarySection(section.id, (currentSection) => ({
                          ...currentSection,
                          description: e.target.value,
                        }))
                      }
                      placeholder="用于后台区分该分类页的用途"
                    />
                  </div>
                </div>

                <div className="flex flex-wrap items-center gap-2">
                  <Badge variant="outline">{sortedCategories.length} 个一级分类</Badge>
                  <Badge variant="secondary">
                    共 {countPresetLibraryNodes(section.categories || [])} 个树节点
                  </Badge>
                  <code className="rounded bg-muted px-1.5 py-0.5 text-xs text-muted-foreground">
                    {section.id}
                  </code>
                </div>
              </div>

              <div className="flex flex-wrap items-center gap-2">
                <Button
                  type="button"
                  variant="outline"
                  size="sm"
                  onClick={() => handleAddPresetLibraryNode(section.id)}
                >
                  <Plus className="mr-2 h-4 w-4" />
                  新增一级分类
                </Button>
                <Switch
                  checked={section.enabled}
                  onCheckedChange={(checked) =>
                    updatePresetLibrarySection(section.id, (currentSection) => ({
                      ...currentSection,
                      enabled: checked,
                    }))
                  }
                />
                <Button
                  type="button"
                  variant="ghost"
                  size="icon"
                  className="h-8 w-8 text-destructive"
                  onClick={() => handleRemovePresetLibrarySection(section.id)}
                >
                  <Trash2 className="h-4 w-4" />
                </Button>
              </div>
            </div>
          </CardHeader>

          <CardContent className="border-t bg-muted/20 pt-4">
            {sortedCategories.length > 0 ? (
              <div className="space-y-4">
                {sortedCategories.map((node, nodeIndex) =>
                  renderPresetLibraryNodeCard(section.id, node, 1, [nodeIndex + 1])
                )}
              </div>
            ) : (
              <div className="rounded-lg border border-dashed bg-background/60 px-4 py-10 text-center text-sm text-muted-foreground">
                当前分类页还没有任何分类树节点，先新增一级分类即可继续建立二级、三级关系。
              </div>
            )}
          </CardContent>
        </Card>
      </motion.div>
    );
  };

  const renderWorkflowOptionCard = (
    step: AgentWorkflowStepUiConfig,
    option: AgentWorkflowOptionUiConfig,
    depth: number,
    indexPath: number[]
  ): ReactNode => {
    const refKey = `${step.key}:${option.key}`;
    const isUploading = uploadingKey === refKey;
    const levelLabel = getWorkflowLevelLabel(depth, "卡片");
    const sortedChildren = [...(option.children || [])].sort(
      (left, right) => left.sortOrder - right.sortOrder
    );
    const canAddChild = depth < AGENT_WORKFLOW_MAX_OPTION_DEPTH;
    const blockedCandidatePanelExpanded = expandedBlockedOptionPanels[refKey] ?? false;
    const blockedCandidatePool = workflowConstraintSettings.crossLevelMutualExclusionEnabled
      ? workflowOptionRelations
      : workflowOptionRelationsByDepth.get(depth) || [];
    const blockedCandidates = blockedCandidatePanelExpanded
      ? blockedCandidatePool.filter((item) => item.key !== option.key)
      : [];
    const selectedBlockedItems = (option.blockedOptionKeys || [])
      .map((blockedKey) => workflowOptionRelationLookup.get(blockedKey))
      .filter((item): item is WorkflowOptionRelation => Boolean(item));
    const isExpanded = isWorkflowOptionExpanded(option.key, depth);
    const blockedSearchValue = blockedOptionSearches[refKey] || "";
    const normalizedBlockedSearchValue = blockedSearchValue.trim().toLowerCase();
    const filteredBlockedCandidates = blockedCandidatePanelExpanded
      ? blockedCandidates.filter((candidate) => {
          if (!normalizedBlockedSearchValue) {
            return true;
          }

          return [candidate.label, candidate.stepTitle, candidate.key].some((value) =>
            value.toLowerCase().includes(normalizedBlockedSearchValue)
          );
        })
      : [];
    const visibleBlockedCandidates = filteredBlockedCandidates.slice(
      0,
      WORKFLOW_BLOCKED_CANDIDATE_RENDER_LIMIT
    );
    const hiddenBlockedCandidateCount =
      filteredBlockedCandidates.length - visibleBlockedCandidates.length;
    const canMoveUp = depth === 1 && indexPath[0] > 1;
    const canMoveDown = depth === 1 && indexPath[0] < (step.options || []).length;

    return (
      <div key={option.key} className={cn("space-y-4", depth > 1 && "pl-4 sm:pl-6")}>
        <Collapsible
          open={isExpanded}
          onOpenChange={() => toggleWorkflowOptionExpansion(option.key, depth)}
        >
          <div
            className={cn(
              "rounded-lg border bg-card p-4",
              !option.enabled && "opacity-60",
              depth > 1 && "border-l-4 border-l-sky-500/30"
            )}
          >
            <div className="flex flex-col gap-3 lg:flex-row lg:items-start lg:justify-between">
              <div className="min-w-0 flex-1">
                <div className="mb-2 flex flex-wrap items-center gap-2">
                  <CollapsibleTrigger asChild>
                    <button
                      type="button"
                      className="flex h-8 w-8 items-center justify-center rounded-md hover:bg-muted"
                      aria-label={isExpanded ? "收起卡片配置" : "展开卡片配置"}
                    >
                      {isExpanded ? (
                        <ChevronDown className="h-4 w-4" />
                      ) : (
                        <ChevronRight className="h-4 w-4" />
                      )}
                    </button>
                  </CollapsibleTrigger>
                  <span className="flex h-8 min-w-8 items-center justify-center rounded-md bg-sky-500/10 px-2 text-xs font-medium text-sky-600">
                    {indexPath.join(".")}
                  </span>
                  <Badge variant="outline">{levelLabel}</Badge>
                  <Badge variant="secondary">{sortedChildren.length} 子卡片</Badge>
                  {!option.enabled ? <Badge variant="secondary">前台显示开发中</Badge> : null}
                  <span className="max-w-[240px] truncate text-sm font-medium">
                    {option.buttonName || "未命名卡片"}
                  </span>
                  <code className="rounded bg-muted px-1.5 py-0.5 text-xs text-muted-foreground">
                    {option.key}
                  </code>
                </div>
                {depth > 1 ? (
                  <div className="text-xs text-muted-foreground">
                    {isExpanded ? "已展开当前子卡片配置" : "当前子卡片已折叠，点击左侧箭头展开详细设置"}
                  </div>
                ) : null}
              </div>

              <div className="flex flex-wrap items-center gap-1">
                {depth === 1 ? (
                  <>
                    <Button
                      type="button"
                      variant="outline"
                      size="icon"
                      className="h-7 w-7"
                      disabled={!canMoveUp}
                      onClick={() => handleMoveRootOption(step.key, option.key, "up")}
                    >
                      <ArrowUp className="h-3.5 w-3.5" />
                    </Button>
                    <Button
                      type="button"
                      variant="outline"
                      size="icon"
                      className="h-7 w-7"
                      disabled={!canMoveDown}
                      onClick={() => handleMoveRootOption(step.key, option.key, "down")}
                    >
                      <ArrowDown className="h-3.5 w-3.5" />
                    </Button>
                  </>
                ) : null}
                {canAddChild ? (
                  <Button
                    type="button"
                    variant="outline"
                    size="sm"
                    onClick={() => handleAddOption(step.key, option.key)}
                  >
                    <Plus className="mr-2 h-4 w-4" />
                    新增子卡片
                  </Button>
                ) : (
                  <Badge variant="outline">{`已达 ${AGENT_WORKFLOW_MAX_OPTION_DEPTH} 级`}</Badge>
                )}
                <Button
                  type="button"
                  variant="ghost"
                  size="icon"
                  className="h-7 w-7 text-destructive"
                  onClick={() => handleRemoveOption(step.key, option.key)}
                >
                  <Trash2 className="h-3.5 w-3.5" />
                </Button>
              </div>
            </div>

            <CollapsibleContent>
              <div className="mt-4 grid grid-cols-[100px_1fr] gap-4">
                <div className="space-y-2">
                  <div className="aspect-square overflow-hidden rounded-lg border bg-muted">
                    {option.previewImageUrl ? (
                      <img
                        src={option.previewImageUrl}
                        alt={option.buttonName}
                        className="h-full w-full object-cover"
                      />
                    ) : (
                      <div className="flex h-full flex-col items-center justify-center gap-1 text-muted-foreground">
                        <ImageIcon className="h-6 w-6 opacity-40" />
                        <span className="text-[10px]">无图片</span>
                      </div>
                    )}
                  </div>
                  <input
                    ref={(el) => {
                      fileInputRefs.current[refKey] = el;
                    }}
                    type="file"
                    accept="image/*"
                    className="hidden"
                    onChange={(e) => {
                      const file = e.target.files?.[0];
                      if (file) {
                        void handleUploadPreview(step.key, option.key, file);
                      }
                      e.target.value = "";
                    }}
                  />
                  <Button
                    type="button"
                    variant="outline"
                    size="sm"
                    className="w-full text-xs"
                    disabled={isUploading}
                    onClick={() => fileInputRefs.current[refKey]?.click()}
                  >
                    {isUploading ? (
                      <Loader2 className="mr-1 h-3 w-3 animate-spin" />
                    ) : (
                      <Upload className="mr-1 h-3 w-3" />
                    )}
                    上传
                  </Button>
                </div>

                <div className="space-y-3">
                  <div className="space-y-1">
                    <Label className="text-xs">按钮名称</Label>
                    <BufferedInput
                      value={option.buttonName}
                      onValueCommit={(value) =>
                        updateOption(step.key, option.key, (currentOption) => ({
                          ...currentOption,
                          buttonName: value,
                        }))
                      }
                      placeholder="选项名称"
                      className="h-8"
                    />
                  </div>
                  <div className="space-y-1">
                    <Label className="text-xs">说明文案</Label>
                    <BufferedInput
                      value={option.description || ""}
                      onValueCommit={(value) =>
                        updateOption(step.key, option.key, (currentOption) => ({
                          ...currentOption,
                          description: value,
                        }))
                      }
                      placeholder="简短描述"
                      className="h-8"
                    />
                  </div>
                  <div className="space-y-1">
                    <div className="flex items-center justify-between gap-2">
                      <Label className="text-xs">Prompt 片段</Label>
                      <span className="text-[10px] text-muted-foreground">
                        {(option.promptFragment || "").length} /{" "}
                        {AGENT_WORKFLOW_PROMPT_FRAGMENT_MAX_LENGTH}
                      </span>
                    </div>
                    <BufferedTextarea
                      value={option.promptFragment || ""}
                      maxLength={AGENT_WORKFLOW_PROMPT_FRAGMENT_MAX_LENGTH}
                      onValueCommit={(value) =>
                        updateOption(step.key, option.key, (currentOption) => ({
                          ...currentOption,
                          promptFragment: value,
                        }))
                      }
                      placeholder="注入的提示词片段"
                      rows={2}
                      className="resize-none text-xs"
                    />
                  </div>
                  <div className="flex items-start justify-between gap-4 rounded-lg border border-dashed bg-muted/20 p-3">
                    <div className="space-y-1">
                      <Label className="text-xs">前台禁用状态</Label>
                      <p className="text-[11px] leading-5 text-muted-foreground">
                        关闭后前端依然会展示这张卡片，但会标记为“开发中”且不可点击。
                      </p>
                    </div>
                    <Switch
                      checked={option.enabled}
                      onCheckedChange={(checked) =>
                        updateOption(step.key, option.key, (currentOption) => ({
                          ...currentOption,
                          enabled: checked,
                        }))
                      }
                      className="mt-1 scale-90"
                    />
                  </div>
                  <div className="space-y-2 rounded-lg border border-dashed bg-muted/20 p-3">
                    <div className="space-y-1">
                      <Label className="text-xs">互斥卡片限制</Label>
                      <p className="text-[11px] leading-5 text-muted-foreground">
                        {workflowConstraintSettings.crossLevelMutualExclusionEnabled
                          ? "当前已开启跨级互斥，可直接限制任意层级卡片；生效时会自动覆盖目标卡片下的全部子级。"
                          : "当前仅展示同级卡片供你配置互斥。一级只与所有一级卡片互斥，二级只与所有二级卡片互斥；生效时会自动覆盖目标卡片下的全部子级。"}
                      </p>
                    </div>

                    {selectedBlockedItems.length > 0 ? (
                      <div className="flex flex-wrap gap-2">
                        {selectedBlockedItems.map((blockedItem) => (
                          <span
                            key={blockedItem.key}
                            className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-xs"
                          >
                            <span className="text-muted-foreground">
                              {getWorkflowLevelLabel(blockedItem.depth, "卡片")}
                            </span>
                            <span className="max-w-[220px] truncate">{blockedItem.label}</span>
                            <button
                              type="button"
                              className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                              onClick={() =>
                                updateOption(step.key, option.key, (currentOption) => ({
                                  ...currentOption,
                                  blockedOptionKeys: (currentOption.blockedOptionKeys || []).filter(
                                    (item) => item !== blockedItem.key
                                  ),
                                }))
                              }
                              aria-label={`移除互斥卡片 ${blockedItem.label}`}
                            >
                              <Trash2 className="h-3 w-3" />
                            </button>
                          </span>
                        ))}
                      </div>
                    ) : (
                      <div className="rounded-md border border-dashed bg-background/70 px-3 py-2 text-xs text-muted-foreground">
                        当前还没有配置互斥卡片
                      </div>
                    )}

	                    <div className="space-y-2 rounded-md border bg-background/70 p-2">
	                      <div className="flex items-center justify-between gap-2">
	                        <span className="text-xs font-medium text-muted-foreground">
	                          候选卡片列表
	                        </span>
	                        <Button
	                          type="button"
	                          variant="ghost"
	                          size="sm"
	                          className="h-7 px-2 text-xs"
	                          onClick={() =>
	                            setExpandedBlockedOptionPanels((prev) => ({
	                              ...prev,
	                              [refKey]: !blockedCandidatePanelExpanded,
	                            }))
	                          }
	                        >
	                          {blockedCandidatePanelExpanded ? "收起候选" : "展开候选"}
	                        </Button>
	                      </div>
	                      {blockedCandidatePanelExpanded ? (
	                        <>
	                          <div className="relative">
	                            <Search className="pointer-events-none absolute left-3 top-1/2 h-3.5 w-3.5 -translate-y-1/2 text-muted-foreground" />
	                            <Input
	                              value={blockedSearchValue}
	                              onChange={(e) =>
	                                setBlockedOptionSearches((prev) => ({
	                                  ...prev,
	                                  [refKey]: e.target.value,
	                                }))
	                              }
	                              placeholder={`${workflowConstraintSettings.crossLevelMutualExclusionEnabled ? "搜索所有层级卡片" : "搜索同级卡片"}（${blockedCandidates.length} 个候选）`}
	                              className="h-8 pl-8 text-xs"
	                            />
	                          </div>
	                          <div className="max-h-44 space-y-2 overflow-y-auto">
	                            {filteredBlockedCandidates.length > 0 ? (
	                              <>
	                                {visibleBlockedCandidates.map((candidate) => {
	                                  const active = (option.blockedOptionKeys || []).includes(candidate.key);
	                                  return (
	                                    <button
	                                      key={candidate.key}
	                                      type="button"
	                                      className={cn(
	                                        "flex w-full items-center justify-between rounded-md border px-3 py-2 text-left text-xs transition-colors",
	                                        active
	                                          ? "border-amber-500/50 bg-amber-500/10 text-foreground"
	                                          : "border-border/70 bg-background hover:border-foreground/20 hover:bg-muted/60"
	                                      )}
	                                      onClick={() =>
	                                        updateOption(step.key, option.key, (currentOption) => {
	                                          const currentBlocked = new Set(
	                                            currentOption.blockedOptionKeys || []
	                                          );
	                                          if (currentBlocked.has(candidate.key)) {
	                                            currentBlocked.delete(candidate.key);
	                                          } else {
	                                            currentBlocked.add(candidate.key);
	                                          }
	                                          return {
	                                            ...currentOption,
	                                            blockedOptionKeys: Array.from(currentBlocked),
	                                          };
	                                        })
	                                      }
	                                    >
	                                      <span className="min-w-0">
	                                        <span className="block truncate font-medium">
	                                          {candidate.label}
	                                        </span>
	                                        <span className="block text-[10px] text-muted-foreground">
	                                          {getWorkflowLevelLabel(candidate.depth, "卡片")} · {candidate.key}
	                                        </span>
	                                      </span>
	                                      <Badge variant={active ? "default" : "outline"}>
	                                        {active ? "已限制" : "可限制"}
	                                      </Badge>
	                                    </button>
	                                  );
	                                })}
	                                {hiddenBlockedCandidateCount > 0 ? (
	                                  <div className="rounded-md border border-dashed bg-muted/40 px-3 py-2 text-center text-[11px] text-muted-foreground">
	                                    还有 {hiddenBlockedCandidateCount} 个候选未显示，请输入关键词缩小范围
	                                  </div>
	                                ) : null}
	                              </>
	                            ) : (
	                              <div className="px-2 py-3 text-center text-xs text-muted-foreground">
	                                {blockedCandidates.length > 0
	                                  ? "没有命中搜索结果，换个关键词试试"
	                                  : workflowConstraintSettings.crossLevelMutualExclusionEnabled
	                                    ? "当前工作流下没有其他可限制的卡片"
	                                    : "当前工作流下没有其他可限制的同级卡片"}
	                              </div>
	                            )}
	                          </div>
	                        </>
	                      ) : (
	                        <div className="rounded-md border border-dashed bg-muted/30 px-3 py-2 text-[11px] text-muted-foreground">
	                          候选列表已折叠，需要配置互斥时再展开，避免大量卡片同时渲染导致编辑卡顿。
	                        </div>
	                      )}
	                    </div>
                  </div>
                </div>
              </div>
              <div className="mt-4 space-y-4">
                <div className="flex items-center justify-between">
                  <div>
                    <div className="text-sm font-medium">子卡片配置</div>
                    <div className="text-xs text-muted-foreground">
                      {`当前卡片下可继续建立最多 ${AGENT_WORKFLOW_MAX_OPTION_DEPTH} 级卡片母子关系。`}
                    </div>
                  </div>
                </div>

                {sortedChildren.length > 0 ? (
                  <div className="space-y-4 border-l border-dashed border-border/80 pl-3 sm:pl-4">
                    {sortedChildren.map((childOption, childIndex) =>
                      renderWorkflowOptionCard(step, childOption, depth + 1, [
                        ...indexPath,
                        childIndex + 1,
                      ])
                    )}
                  </div>
                ) : (
                  <div className="rounded-lg border border-dashed bg-background/60 px-4 py-6 text-center text-sm text-muted-foreground">
                    暂无子卡片
                  </div>
                )}
              </div>
            </CollapsibleContent>
          </div>
        </Collapsible>
      </div>
    );
  };

  const renderWorkflowStepDropZone = (
    targetStepKey: string | null,
    position: WorkflowStepDropPosition,
    depth = 1
  ) => {
    const active =
      stepDropTarget?.stepKey === targetStepKey && stepDropTarget.position === position;
    const visible = Boolean(draggedStepKey);
    const label = targetStepKey
      ? position === "before"
        ? "放到此模块前面"
        : position === "after"
          ? "放到此模块后面"
          : "放入此模块作为子模块"
      : "放到这里成为一级模块";

    return (
      <div
        onDragOver={(event) => handleWorkflowStepDragOver(event, targetStepKey, position)}
        onDrop={(event) => handleWorkflowStepDrop(event, targetStepKey, position)}
        onDragLeave={(event) => {
          event.stopPropagation();
          if (active) {
            setStepDropTarget(null);
          }
        }}
        className={cn(
          "transition-all",
          visible
            ? "my-2 flex min-h-8 items-center rounded-lg border border-dashed px-3 text-xs"
            : "h-1",
          depth > 1 && "ml-4 sm:ml-6",
          active
            ? "border-emerald-500 bg-emerald-500/10 text-emerald-700"
            : visible
              ? "border-border/70 bg-muted/20 text-muted-foreground"
              : "border-transparent"
        )}
      >
        {visible ? label : null}
      </div>
    );
  };

  const renderWorkflowStepCard = (
    step: AgentWorkflowStepUiConfig,
    depth: number,
    indexPath: number[],
    siblingCount = 0
  ) => {
    const stepLabel = indexPath.join(".");
    const levelLabel = getWorkflowLevelLabel(depth, "模块");
    const rootOptions = [...(step.options || [])].sort((left, right) => left.sortOrder - right.sortOrder);
    const sortedChildSteps = [...(step.children || [])].sort(
      (left, right) => left.sortOrder - right.sortOrder
    );
    const optionCardCount = countAgentWorkflowOptionTree(step.options || []);
    const isTopLevelStep = depth === 1;
    const canMoveTopLevelStepUp = isTopLevelStep && indexPath[0] > 1;
    const canMoveTopLevelStepDown = isTopLevelStep && indexPath[0] < siblingCount;
    const canAddChildStep = depth < AGENT_WORKFLOW_MAX_TREE_DEPTH;
    const canPasteAsChild =
      Boolean(copiedWorkflowStep) &&
      depth + getWorkflowStepSubtreeDepth(copiedWorkflowStep as AgentWorkflowStepUiConfig) <=
        AGENT_WORKFLOW_MAX_TREE_DEPTH;
    const insideDropActive =
      stepDropTarget?.stepKey === step.key && stepDropTarget.position === "inside";

    return (
      <div key={step.key} className="space-y-1">
        {renderWorkflowStepDropZone(step.key, "before", depth)}
        <motion.div
          variants={itemVariants}
          className={cn(depth > 1 && "pl-4 sm:pl-6")}
        >
          <Collapsible
            open={expandedSteps.has(step.key)}
            onOpenChange={() => toggleStepExpansion(step.key)}
          >
            <Card
              onDragOver={(event) => handleWorkflowStepDragOver(event, step.key, "inside")}
              onDrop={(event) => handleWorkflowStepDrop(event, step.key, "inside")}
              className={cn(
                "transition-shadow",
                !step.enabled && "opacity-60",
                depth > 1 && "border-l-4 border-l-emerald-500/30",
                insideDropActive && "ring-2 ring-emerald-500 ring-offset-2"
              )}
            >
              <CardHeader className="py-4">
                <div className="flex flex-col gap-3 lg:flex-row lg:items-center">
                  <div className="flex items-center gap-3">
                    <button
                      type="button"
                      draggable
                      onDragStart={(event) => handleWorkflowStepDragStart(event, step.key)}
                      onDragEnd={handleWorkflowStepDragEnd}
                      className="flex h-8 w-8 cursor-grab items-center justify-center rounded-md border bg-background text-muted-foreground transition-colors hover:border-emerald-500/50 hover:text-emerald-600 active:cursor-grabbing"
                      title="拖动模块，可跨级调整父子关系"
                    >
                      <GripVertical className="h-4 w-4" />
                    </button>
                    <CollapsibleTrigger asChild>
                      <button className="flex h-8 w-8 items-center justify-center rounded-md hover:bg-muted">
                        {expandedSteps.has(step.key) ? (
                          <ChevronDown className="h-4 w-4" />
                        ) : (
                          <ChevronRight className="h-4 w-4" />
                        )}
                      </button>
                    </CollapsibleTrigger>

                    <div className="flex h-9 min-w-9 items-center justify-center rounded-md bg-emerald-500/10 px-2 text-xs font-medium text-emerald-600">
                      {stepLabel}
                    </div>
                  </div>

                  <div className="min-w-0 flex-1">
                    <div className="flex flex-wrap items-center gap-2">
                      <BufferedInput
                        value={step.title}
                        onValueCommit={(value) =>
                          updateStep(step.key, (currentStep) => ({
                            ...currentStep,
                            title: value,
                          }))
                        }
                        className="h-8 min-w-[180px] max-w-[260px] border-0 bg-transparent px-0 text-base font-medium shadow-none focus-visible:ring-0"
                        placeholder="模块标题"
                      />
                      <Badge variant="outline">{levelLabel}</Badge>
                      <Badge variant="secondary">{sortedChildSteps.length} 子模块</Badge>
                      <code className="rounded bg-muted px-1.5 py-0.5 text-xs text-muted-foreground">
                        {step.key}
                      </code>
                    </div>
                  </div>

                  <div className="flex flex-wrap items-center gap-2">
                    <Badge variant="secondary">{optionCardCount} 张卡片</Badge>
                    <Badge variant="outline">卡片树结构</Badge>
                    {isTopLevelStep ? (
                      <>
                        <Button
                          type="button"
                          variant="outline"
                          size="icon"
                          className="h-8 w-8"
                          onClick={() => handleMoveTopLevelStep(step.key, "up")}
                          disabled={!canMoveTopLevelStepUp}
                        >
                          <ArrowUp className="h-4 w-4" />
                        </Button>
                        <Button
                          type="button"
                          variant="outline"
                          size="icon"
                          className="h-8 w-8"
                          onClick={() => handleMoveTopLevelStep(step.key, "down")}
                          disabled={!canMoveTopLevelStepDown}
                        >
                          <ArrowDown className="h-4 w-4" />
                        </Button>
                      </>
                    ) : null}
                    {canAddChildStep ? (
                      <Button
                        type="button"
                        variant="outline"
                        size="sm"
                        onClick={() => handleAddChildStep(step.key, depth)}
                      >
                        <Plus className="mr-2 h-4 w-4" />
                        子模块
                      </Button>
                    ) : null}
                    <Button
                      type="button"
                      variant="outline"
                      size="icon"
                      className="h-8 w-8"
                      onClick={() => handleCopyWorkflowStep(step.key)}
                      title="复制模块及全部子模块"
                    >
                      <Copy className="h-4 w-4" />
                    </Button>
                    <Button
                      type="button"
                      variant="outline"
                      size="sm"
                      disabled={!canPasteAsChild}
                      onClick={() => handlePasteWorkflowStep(step.key)}
                      title="粘贴为当前模块的子模块"
                    >
                      <ClipboardPaste className="mr-2 h-4 w-4" />
                      粘贴
                    </Button>
                    <Switch
                      checked={step.enabled}
                      onCheckedChange={(checked) =>
                        updateStep(step.key, (currentStep) => ({
                          ...currentStep,
                          enabled: checked,
                        }))
                      }
                    />
                    <Button
                      type="button"
                      variant="ghost"
                      size="icon"
                      className="h-8 w-8 text-destructive"
                      onClick={() => handleRemoveStep(step.key)}
                    >
                      <Trash2 className="h-4 w-4" />
                    </Button>
                  </div>
                </div>
              </CardHeader>

              <CollapsibleContent>
                <CardContent className="border-t bg-muted/20 pt-4">
                  <div className="mb-4 space-y-2">
                    <Label className="text-xs">模块说明</Label>
                    <BufferedTextarea
                      value={step.description || ""}
                      onValueCommit={(value) =>
                        updateStep(step.key, (currentStep) => ({
                          ...currentStep,
                          description: value,
                        }))
                      }
                      rows={2}
                      placeholder="描述此模块的用途..."
                      className="bg-background"
                    />
                  </div>

                  <div className="mb-4 flex items-center justify-between">
                    <span className="text-sm font-medium">卡片配置</span>
                    <Button
                      type="button"
                      variant="outline"
                      size="sm"
                      onClick={() => handleAddOption(step.key)}
                    >
                      <Plus className="mr-2 h-4 w-4" />
                      新增一级卡片
                    </Button>
                  </div>

                  {rootOptions.length > 0 ? (
                    <div className="space-y-4">
                      {rootOptions.map((option, optionIndex) =>
                        renderWorkflowOptionCard(step, option, 1, [optionIndex + 1])
                      )}
                    </div>
                  ) : (
                    <div className="rounded-lg border border-dashed py-8 text-center text-sm text-muted-foreground">
                      暂无卡片，点击上方按钮添加
                    </div>
                  )}

                  <div className="mt-6 space-y-4 border-t pt-4">
                    <div className="flex flex-wrap items-center justify-between gap-3">
                      <div>
                        <div className="text-sm font-medium">子模块配置</div>
                        <div className="text-xs text-muted-foreground">
                          支持把模块拖到任意主模块或子模块下，最多 {AGENT_WORKFLOW_MAX_TREE_DEPTH} 级。
                        </div>
                      </div>
                      <div className="flex flex-wrap items-center gap-2">
                        {copiedWorkflowStep ? (
                          <Button
                            type="button"
                            variant="outline"
                            size="sm"
                            disabled={!canPasteAsChild}
                            onClick={() => handlePasteWorkflowStep(step.key)}
                          >
                            <ClipboardPaste className="mr-2 h-4 w-4" />
                            粘贴到这里
                          </Button>
                        ) : null}
                        {canAddChildStep ? (
                          <Button
                            type="button"
                            variant="outline"
                            size="sm"
                            onClick={() => handleAddChildStep(step.key, depth)}
                          >
                            <Plus className="mr-2 h-4 w-4" />
                            新增子模块
                          </Button>
                        ) : (
                          <Badge variant="outline">{`已达 ${AGENT_WORKFLOW_MAX_TREE_DEPTH} 级`}</Badge>
                        )}
                      </div>
                    </div>

                    {sortedChildSteps.length > 0 ? (
                      <div className="space-y-3 border-l border-dashed border-border/80 pl-3 sm:pl-4">
                        {sortedChildSteps.map((childStep, childIndex) =>
                          renderWorkflowStepCard(childStep, depth + 1, [
                            ...indexPath,
                            childIndex + 1,
                          ], sortedChildSteps.length)
                        )}
                      </div>
                    ) : (
                      <div className="rounded-lg border border-dashed bg-background/60 px-4 py-6 text-center text-sm text-muted-foreground">
                        暂无子模块，可拖入其它模块或点击新增子模块
                      </div>
                    )}
                  </div>
                </CardContent>
              </CollapsibleContent>
            </Card>
          </Collapsible>
        </motion.div>
        {renderWorkflowStepDropZone(step.key, "after", depth)}
      </div>
    );
  };

  const updateBrandModelEntry = (
    brandName: string,
    updater: (
      entry: NonNullable<AgentWorkflowBrandModelConfig["entries"][number]>
    ) => NonNullable<AgentWorkflowBrandModelConfig["entries"][number]>
  ) => {
    setBrandModelConfig((prev) => {
      const entryIndex = prev.entries.findIndex((entry) => entry.brandName === brandName);
      const currentEntry =
        entryIndex >= 0
          ? prev.entries[entryIndex]
          : {
              brandName,
              images: [],
            };
      const nextEntry = updater(currentEntry);
      const nextEntries =
        entryIndex >= 0
          ? prev.entries.map((entry, index) => (index === entryIndex ? nextEntry : entry))
          : [...prev.entries, nextEntry];

      return {
        entries: nextEntries
          .filter((entry) => entry.images.length > 0 || configuredBrands.includes(entry.brandName))
          .map((entry) => ({
            ...entry,
            images: entry.images
              .slice()
              .sort((left, right) => left.sortOrder - right.sortOrder)
              .map((image, index) => ({
                ...image,
                sortOrder: index,
              })),
          })),
      };
    });
  };

  const handleUploadBrandModelImages = async (brandName: string, files: FileList | null) => {
    const pickedFiles = Array.from(files || []).filter((file) => file.type.startsWith("image/"));
    if (pickedFiles.length === 0) {
      toast.error("请先选择图片文件");
      return;
    }

    const refKey = `brand-model:${brandName}`;
    try {
      setUploadingKey(refKey);
      const uploadedImages: AgentWorkflowBrandModelConfig["entries"][number]["images"] = [];

      for (const file of pickedFiles) {
        const formData = new FormData();
        formData.append("file", file);

        const response = await fetchUploadWithRetry(formData);
        const result = await response.json();

        if (!response.ok || !result?.url) {
          throw new Error(result?.error || "上传失败");
        }

        uploadedImages.push({
          id:
            (typeof result.assetId === "string" && result.assetId.trim()) ||
            `${Date.now()}-${Math.random().toString(36).slice(2, 10)}`,
          assetId: typeof result.assetId === "string" ? result.assetId : null,
          imageUrl: result.url,
          displayName: file.name,
          mimeType: file.type || null,
          sortOrder: 0,
        });
      }

      updateBrandModelEntry(brandName, (entry) => ({
        ...entry,
        images: [
          ...entry.images,
          ...uploadedImages.map((image, index) => ({
            ...image,
            sortOrder: entry.images.length + index,
          })),
        ],
      }));
      toast.success(
        uploadedImages.length === 1 ? "模特图上传成功" : `已上传 ${uploadedImages.length} 张模特图`
      );
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "模特图上传失败");
    } finally {
      setUploadingKey(null);
    }
  };

  const handleRemoveBrandModelImage = (brandName: string, imageId: string) => {
    updateBrandModelEntry(brandName, (entry) => ({
      ...entry,
      images: entry.images.filter((image) => image.id !== imageId),
    }));
  };

  const handleUploadShowcaseAsset = async (
    target: "video" | "poster",
    file: File
  ) => {
    const isVideo = target === "video";
    const expectedPrefix = isVideo ? "video/" : "image/";

    if (!file.type.startsWith(expectedPrefix)) {
      toast.error(isVideo ? "请上传视频文件" : "请上传图片文件");
      return;
    }

    const refKey = `showcase:${target}`;
    try {
      setUploadingKey(refKey);
      const formData = new FormData();
      formData.append("file", file);

      const response = await fetchUploadWithRetry(formData);
      const result = await response.json();

      if (!response.ok || !result?.url) {
        throw new Error(result?.error || "上传失败");
      }

      setShowcaseConfig((prev) => ({
        ...prev,
        [target === "video" ? "videoUrl" : "posterUrl"]: result.url,
      }));
      toast.success(isVideo ? "视频海报上传成功" : "视频封面上传成功");
    } catch (error) {
      toast.error(error instanceof Error ? error.message : "上传失败");
    } finally {
      setUploadingKey(null);
    }
  };

  if (isLoading) {
    return (
      <div className="container mx-auto p-6">
        <div className="flex h-[60vh] items-center justify-center">
          <div className="flex items-center gap-3 text-muted-foreground">
            <Loader2 className="h-5 w-5 animate-spin" />
            <span>加载配置中...</span>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="min-h-screen bg-gradient-to-b from-background to-muted/20">
      {/* Header */}
      <header className="sticky top-0 z-30 border-b bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
        <div className="container mx-auto px-6 py-4">
          <div className="flex flex-wrap items-center justify-between gap-4">
            <div className="flex items-center gap-4">
              <div className="flex h-10 w-10 items-center justify-center rounded-xl bg-gradient-to-br from-violet-500 to-purple-600 shadow-lg shadow-violet-500/20">
                <Sparkles className="h-5 w-5 text-white" />
              </div>
              <div>
                <h1 className="text-xl font-semibold tracking-tight">风格化工作流配置</h1>
                <p className="text-sm text-muted-foreground">
                  配置风格化页面的视频海报、素材搜索、品牌模特及工作流步骤
                </p>
              </div>
            </div>

            <div className="flex items-center gap-2">
              {autoDraftUpdatedAt ? (
                <span className="hidden rounded-full border bg-background px-3 py-1 text-xs text-muted-foreground lg:inline-flex">
                  {autoDraftStatus === "restored" ? "已恢复本地草稿" : "本地草稿已自动保存"} ·{" "}
                  {new Date(autoDraftUpdatedAt).toLocaleTimeString("zh-CN", {
                    hour: "2-digit",
                    minute: "2-digit",
                    second: "2-digit",
                  })}
                </span>
              ) : null}
              <Button
                type="button"
                variant="outline"
                size="sm"
                onClick={handleRestorePreservedDraft}
              >
                {recoverableDraftUpdatedAt ? "恢复旧草稿" : "查找旧草稿"}
              </Button>
              <Button asChild variant="outline" size="sm">
                <Link href="/settings/agent-workflow/psd-templates">
                  <Layers className="mr-2 h-4 w-4" />
                  PSD模板
                </Link>
              </Button>
              <Button asChild variant="outline" size="sm">
                <Link href={backHref}>
                  <ArrowLeft className="mr-2 h-4 w-4" />
                  {backLabel}
                </Link>
              </Button>
              <Button 
                onClick={handleSave} 
                disabled={isSaving}
                size="sm"
                className="bg-gradient-to-r from-violet-600 to-purple-600 hover:from-violet-500 hover:to-purple-500"
              >
                {isSaving ? (
                  <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                ) : (
                  <Save className="mr-2 h-4 w-4" />
                )}
                保存配置
              </Button>
            </div>
          </div>
        </div>
      </header>

      {/* Stats Bar */}
      <div className="border-b bg-muted/30">
        <div className="container mx-auto px-6 py-3">
          <div className="flex flex-wrap items-center gap-6">
            <div className="flex items-center gap-2">
              <Badge variant="secondary" className="font-mono">
                {enabledStepsCount}
              </Badge>
              <span className="text-sm text-muted-foreground">已启用步骤</span>
            </div>
            <div className="flex items-center gap-2">
              <Badge variant="secondary" className="font-mono">
                {totalOptionsCount}
              </Badge>
              <span className="text-sm text-muted-foreground">已启用选项</span>
            </div>
            <div className="flex items-center gap-2">
              <Badge variant="secondary" className="font-mono">
                {enabledPresetLibrarySectionCount}
              </Badge>
              <span className="text-sm text-muted-foreground">分类页</span>
            </div>
            <div className="flex items-center gap-2">
              <Badge variant="secondary" className="font-mono">
                {totalPresetLibraryNodeCount}
              </Badge>
              <span className="text-sm text-muted-foreground">分类树节点</span>
            </div>
            <div className="flex items-center gap-2">
              <Badge 
                variant={materialApiConfig.enabled ? "default" : "secondary"}
                className={cn(
                  "font-mono",
                  materialApiConfig.enabled && "bg-emerald-500/10 text-emerald-600 hover:bg-emerald-500/20"
                )}
              >
                {materialApiConfig.enabled ? "已开启" : "已关闭"}
              </Badge>
              <span className="text-sm text-muted-foreground">素材搜索</span>
            </div>
            <div className="flex items-center gap-2">
              <Badge 
                variant={showcaseConfig.enabled ? "default" : "secondary"}
                className={cn(
                  "font-mono",
                  showcaseConfig.enabled && "bg-emerald-500/10 text-emerald-600 hover:bg-emerald-500/20"
                )}
              >
                {showcaseConfig.enabled ? "已开启" : "已关闭"}
              </Badge>
              <span className="text-sm text-muted-foreground">顶部视频</span>
            </div>
          </div>
        </div>
      </div>

      {/* Main Content */}
      <main className="container mx-auto p-6">
        <Tabs value={activeTab} onValueChange={setActiveTab} className="space-y-6">
          <TabsList className="grid w-full grid-cols-5 lg:w-fit">
            <TabsTrigger value="showcase" className="gap-2">
              <MonitorPlay className="h-4 w-4" />
              <span className="hidden sm:inline">顶部海报</span>
            </TabsTrigger>
            <TabsTrigger value="basics" className="gap-2">
              <Settings2 className="h-4 w-4" />
              <span className="hidden sm:inline">基础配置</span>
            </TabsTrigger>
            <TabsTrigger value="models" className="gap-2">
              <UserCircle className="h-4 w-4" />
              <span className="hidden sm:inline">品牌模特</span>
              <Badge variant="secondary" className="ml-1 h-5 px-1.5 text-xs">
                {brandModelConfig.entries.reduce((acc, e) => acc + e.images.length, 0)}
              </Badge>
            </TabsTrigger>
            <TabsTrigger value="categories" className="gap-2">
              <Package className="h-4 w-4" />
              <span className="hidden sm:inline">生图分类</span>
              <Badge variant="secondary" className="ml-1 h-5 px-1.5 text-xs">
                {sortedPresetLibrarySections.length}
              </Badge>
            </TabsTrigger>
            <TabsTrigger value="workflow" className="gap-2">
              <Layers className="h-4 w-4" />
              <span className="hidden sm:inline">工作流步骤</span>
              <Badge variant="secondary" className="ml-1 h-5 px-1.5 text-xs">
                {sortedSteps.length}
              </Badge>
            </TabsTrigger>
          </TabsList>

          {/* Showcase Tab */}
          <TabsContent value="showcase" className="space-y-6">
            <motion.div
              initial="hidden"
              animate="visible"
              variants={containerVariants}
              className="grid gap-6 lg:grid-cols-[1fr_400px]"
            >
              <motion.div variants={itemVariants} className="space-y-6">
                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center justify-between">
                      <div className="flex items-center gap-3">
                        <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-violet-500/10">
                          <Video className="h-4 w-4 text-violet-600" />
                        </div>
                        <div>
                          <CardTitle className="text-base">顶部视频海报</CardTitle>
                          <CardDescription>
                            配置第一步顶部展示区的视频海报内容
                          </CardDescription>
                        </div>
                      </div>
                      <Switch
                        checked={showcaseConfig.enabled}
                        onCheckedChange={(checked) =>
                          setShowcaseConfig((prev) => ({ ...prev, enabled: checked }))
                        }
                      />
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-6">
                    <div className="grid grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label className="text-xs">顶部主标题</Label>
                        <Input
                          value={showcaseConfig.title}
                          onChange={(e) =>
                            setShowcaseConfig((prev) => ({ ...prev, title: e.target.value }))
                          }
                          placeholder="三倍速出片，电影级质感"
                        />
                      </div>
                      <div className="space-y-2">
                        <Label className="text-xs">顶部副标题</Label>
                        <Input
                          value={showcaseConfig.subtitle}
                          onChange={(e) =>
                            setShowcaseConfig((prev) => ({ ...prev, subtitle: e.target.value }))
                          }
                          placeholder="选择生图模式、查询商品图、完成风格配置并实时查看结果"
                        />
                      </div>
                    </div>

                    <div className="grid grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label className="text-xs">按钮文案</Label>
                        <Input
                          value={showcaseConfig.actionText}
                          onChange={(e) =>
                            setShowcaseConfig((prev) => ({ ...prev, actionText: e.target.value }))
                          }
                          placeholder="我要创作"
                        />
                      </div>
                      <div className="space-y-2">
                        <Label className="text-xs">海报底部说明</Label>
                        <Input
                          value={showcaseConfig.footerText || ""}
                          onChange={(e) =>
                            setShowcaseConfig((prev) => ({ ...prev, footerText: e.target.value }))
                          }
                          placeholder="用户作品"
                        />
                      </div>
                    </div>

                    <div className="space-y-2">
                      <Label className="text-xs">海报叠加文字</Label>
                      <Textarea
                        value={showcaseConfig.overlayText || ""}
                        onChange={(e) =>
                          setShowcaseConfig((prev) => ({ ...prev, overlayText: e.target.value }))
                        }
                        rows={2}
                        placeholder="让每一步选择，都能直达高质感成片"
                      />
                    </div>

                    <Separator />

                    <div className="space-y-4">
                      <Label className="text-xs">媒体文件</Label>
                      <div className="grid grid-cols-2 gap-4">
                        <div className="space-y-2">
                          <Input
                            value={showcaseConfig.videoUrl}
                            onChange={(e) =>
                              setShowcaseConfig((prev) => ({ ...prev, videoUrl: e.target.value }))
                            }
                            placeholder="视频链接 https://..."
                          />
                          <input
                            ref={(el) => { fileInputRefs.current["showcase:video"] = el; }}
                            type="file"
                            accept="video/*"
                            className="hidden"
                            onChange={(e) => {
                              const file = e.target.files?.[0];
                              if (file) void handleUploadShowcaseAsset("video", file);
                              e.target.value = "";
                            }}
                          />
                          <Button
                            type="button"
                            variant="outline"
                            size="sm"
                            className="w-full"
                            disabled={uploadingKey === "showcase:video"}
                            onClick={() => fileInputRefs.current["showcase:video"]?.click()}
                          >
                            {uploadingKey === "showcase:video" ? (
                              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                            ) : (
                              <Upload className="mr-2 h-4 w-4" />
                            )}
                            上传视频
                          </Button>
                        </div>
                        <div className="space-y-2">
                          <Input
                            value={showcaseConfig.posterUrl || ""}
                            onChange={(e) =>
                              setShowcaseConfig((prev) => ({ ...prev, posterUrl: e.target.value }))
                            }
                            placeholder="封面链接 https://..."
                          />
                          <input
                            ref={(el) => { fileInputRefs.current["showcase:poster"] = el; }}
                            type="file"
                            accept="image/*"
                            className="hidden"
                            onChange={(e) => {
                              const file = e.target.files?.[0];
                              if (file) void handleUploadShowcaseAsset("poster", file);
                              e.target.value = "";
                            }}
                          />
                          <Button
                            type="button"
                            variant="outline"
                            size="sm"
                            className="w-full"
                            disabled={uploadingKey === "showcase:poster"}
                            onClick={() => fileInputRefs.current["showcase:poster"]?.click()}
                          >
                            {uploadingKey === "showcase:poster" ? (
                              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                            ) : (
                              <Upload className="mr-2 h-4 w-4" />
                            )}
                            上传封面
                          </Button>
                        </div>
                      </div>
                    </div>
                  </CardContent>
                </Card>
              </motion.div>

              {/* Preview Panel */}
              <motion.div variants={itemVariants}>
                <Card className="sticky top-24">
                  <CardHeader className="pb-4">
                    <CardTitle className="text-base">前台预览</CardTitle>
                    <CardDescription>实时查看海报展示效果</CardDescription>
                  </CardHeader>
                  <CardContent>
                    <div className="overflow-hidden rounded-2xl border bg-slate-950 shadow-2xl">
                      <div className="relative aspect-[21/9] w-full overflow-hidden bg-black">
                        {showcaseConfig.videoUrl ? (
                          <video
                            key={showcaseConfig.videoUrl}
                            src={showcaseConfig.videoUrl}
                            poster={showcaseConfig.posterUrl || undefined}
                            className="h-full w-full object-cover"
                            autoPlay
                            muted
                            loop
                            playsInline
                          />
                        ) : showcaseConfig.posterUrl ? (
                          <img
                            src={showcaseConfig.posterUrl}
                            alt={showcaseConfig.title}
                            className="h-full w-full object-cover"
                          />
                        ) : (
                          <div className="flex h-full w-full flex-col items-center justify-center gap-2 text-white/30">
                            <ImageIcon className="h-8 w-8" />
                            <span className="text-xs">暂无媒体</span>
                          </div>
                        )}
                        <div className="pointer-events-none absolute inset-0 bg-gradient-to-t from-black/70 via-black/20 to-black/40" />
                        
                        {showcaseConfig.overlayText && (
                          <div className="pointer-events-none absolute inset-0 flex items-center justify-center px-6 text-center">
                            <span className="text-lg font-semibold tracking-widest text-white/90 drop-shadow-lg">
                              {showcaseConfig.overlayText}
                            </span>
                          </div>
                        )}
                        
                        {showcaseConfig.footerText && (
                          <div className="pointer-events-none absolute bottom-4 left-4">
                            <span className="rounded-full border border-white/20 bg-black/40 px-3 py-1 text-xs text-white/80 backdrop-blur-sm">
                              {showcaseConfig.footerText}
                            </span>
                          </div>
                        )}
                      </div>
                    </div>

                    <div className="mt-4 space-y-3 rounded-xl border bg-muted/30 p-4">
                      <div>
                        <span className="text-xs text-muted-foreground">主标题</span>
                        <p className="font-medium">{showcaseConfig.title || "未设置"}</p>
                      </div>
                      <div>
                        <span className="text-xs text-muted-foreground">副标题</span>
                        <p className="text-sm">{showcaseConfig.subtitle || "未设置"}</p>
                      </div>
                      <div>
                        <span className="text-xs text-muted-foreground">按钮</span>
                        <p className="text-sm">{showcaseConfig.actionText || "未设置"}</p>
                      </div>
                    </div>
                  </CardContent>
                </Card>
              </motion.div>
            </motion.div>
          </TabsContent>

          {/* Basics Tab */}
          <TabsContent value="basics" className="space-y-6">
            <motion.div
              initial="hidden"
              animate="visible"
              variants={containerVariants}
              className="grid gap-6 lg:grid-cols-2"
            >
              <motion.div variants={itemVariants} className="lg:col-span-2">
                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-violet-500/10">
                        <Settings2 className="h-4 w-4 text-violet-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">前台流程功能开关</CardTitle>
                        <CardDescription>
                          控制风格化页面是否展示选择生图模式、选择 SPU / SKU 和套 PSD 模板入口
                        </CardDescription>
                      </div>
                    </div>
                  </CardHeader>
	                  <CardContent className="grid gap-3 md:grid-cols-4">
                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div className="pr-4">
                        <div className="text-sm font-medium">开启第一步：选择生图模式</div>
                        <div className="text-xs text-muted-foreground">
                          关闭后前台不再要求选择生图模式，直接进入后续配置并选择模型生图。
                        </div>
                      </div>
                      <Switch
                        checked={workflowPageFeatureSettings.presetStepEnabled}
                        onCheckedChange={(checked) =>
                          setConfig((prev) => ({
                            ...prev,
                            pageFeatureSettings: {
                              ...(prev.pageFeatureSettings ||
                                defaultAgentWorkflowPageFeatureSettings),
                              presetStepEnabled: checked,
                            },
                          }))
                        }
                      />
                    </div>

                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div className="pr-4">
                        <div className="text-sm font-medium">开启第二步：选择 SPU / SKU</div>
                        <div className="text-xs text-muted-foreground">
                          关闭后前台跳过商品素材搜索，不再强制补齐 SPU / SKU 输入图槽位。
                        </div>
                      </div>
                      <Switch
                        checked={workflowPageFeatureSettings.materialStepEnabled}
                        onCheckedChange={(checked) =>
                          setConfig((prev) => ({
                            ...prev,
                            pageFeatureSettings: {
                              ...(prev.pageFeatureSettings ||
                                defaultAgentWorkflowPageFeatureSettings),
                              materialStepEnabled: checked,
                            },
                          }))
                        }
                      />
                    </div>

	                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
	                      <div className="pr-4">
	                        <div className="text-sm font-medium">开启套 PSD 模板</div>
                        <div className="text-xs text-muted-foreground">
                          关闭后前台隐藏所有“套PSD”按钮和 PSD 模板编辑弹窗入口。
                        </div>
                      </div>
                      <Switch
	                        checked={workflowPageFeatureSettings.psdTemplateEnabled}
	                        onCheckedChange={(checked) =>
	                          setConfig((prev) => ({
                            ...prev,
                            pageFeatureSettings: {
                              ...(prev.pageFeatureSettings ||
                                defaultAgentWorkflowPageFeatureSettings),
                              psdTemplateEnabled: checked,
                            },
                          }))
                        }
	                      />
	                    </div>

	                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
	                      <div className="pr-4">
	                        <div className="text-sm font-medium">开启批量处理</div>
	                        <div className="text-xs text-muted-foreground">
	                          关闭后前台顶部导航和无限画布工具栏都隐藏“批量处理”入口。
	                        </div>
	                      </div>
	                      <Switch
	                        checked={workflowPageFeatureSettings.batchProcessingEnabled}
	                        onCheckedChange={(checked) =>
	                          setConfig((prev) => ({
	                            ...prev,
	                            pageFeatureSettings: {
	                              ...(prev.pageFeatureSettings ||
	                                defaultAgentWorkflowPageFeatureSettings),
	                              batchProcessingEnabled: checked,
	                            },
	                          }))
	                        }
	                      />
	                    </div>
	                  </CardContent>
                </Card>
              </motion.div>

              <motion.div variants={itemVariants} className="lg:col-span-2">
                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-emerald-500/10">
                        <Search className="h-4 w-4 text-emerald-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">素材搜索接口</CardTitle>
                        <CardDescription>配置白底图、详情参考图、SKU 参考图共用接口</CardDescription>
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-4">
                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div>
                        <div className="text-sm font-medium">启用素材搜索</div>
                        <div className="text-xs text-muted-foreground">
                          开启后支持搜索白底素材图、详情参考图和 SKU 参考图
                        </div>
                      </div>
                      <Switch
                        checked={materialApiConfig.enabled}
                        onCheckedChange={(checked) =>
                          setMaterialApiConfig((prev) => ({ ...prev, enabled: checked }))
                        }
                      />
                    </div>

                    <div className="space-y-2">
                      <Label className="text-xs">接口基地址</Label>
                      <Input
                        value={materialApiConfig.baseUrl}
                        onChange={(e) =>
                          setMaterialApiConfig((prev) => ({ ...prev, baseUrl: e.target.value }))
                        }
                        placeholder="https://..."
                      />
                    </div>
                    <div className="space-y-2">
                      <Label className="text-xs">API Key</Label>
                      <Input
                        type="password"
                        value={materialApiConfig.apiKey}
                        onChange={(e) =>
                          setMaterialApiConfig((prev) => ({ ...prev, apiKey: e.target.value }))
                        }
                        placeholder="输入 API Key"
                      />
                    </div>
                  </CardContent>
                </Card>
              </motion.div>

              <motion.div variants={itemVariants} className="lg:col-span-2">
                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-cyan-500/10">
                        <Package className="h-4 w-4 text-cyan-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">SKU 商品信息接口</CardTitle>
                        <CardDescription>配置货号 / 条码查询商品资料接口</CardDescription>
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-4">
                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div>
                        <div className="text-sm font-medium">启用商品信息查询</div>
                        <div className="text-xs text-muted-foreground">
                          开启后 SKU 查询结果会显示商品名称、尺寸、材质、设计师、采购负责人、板材类型
                        </div>
                      </div>
                      <Switch
                        checked={goodsInfoApiConfig.enabled}
                        onCheckedChange={(checked) =>
                          setGoodsInfoApiConfig((prev) => ({ ...prev, enabled: checked }))
                        }
                      />
                    </div>

                    <div className="space-y-2">
                      <Label className="text-xs">接口基地址</Label>
                      <Input
                        value={goodsInfoApiConfig.baseUrl}
                        onChange={(e) =>
                          setGoodsInfoApiConfig((prev) => ({ ...prev, baseUrl: e.target.value }))
                        }
                        placeholder="https://www.jiansun.vip:63211"
                      />
                    </div>

                    <div className="grid grid-cols-2 gap-4">
                      <div className="space-y-2">
                        <Label className="text-xs">Client Key</Label>
                        <Input
                          value={goodsInfoApiConfig.clientKey}
                          onChange={(e) =>
                            setGoodsInfoApiConfig((prev) => ({
                              ...prev,
                              clientKey: e.target.value,
                            }))
                          }
                          placeholder="例如：yunyingb"
                        />
                      </div>
                      <div className="space-y-2">
                        <Label className="text-xs">Secret</Label>
                        <Input
                          type="password"
                          value={goodsInfoApiConfig.secret}
                          onChange={(e) =>
                            setGoodsInfoApiConfig((prev) => ({
                              ...prev,
                              secret: e.target.value,
                            }))
                          }
                          placeholder="输入 Secret"
                        />
                      </div>
                    </div>
                  </CardContent>
                </Card>
              </motion.div>

              <motion.div variants={itemVariants} className="lg:col-span-2">
                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-amber-500/10">
                        <Package className="h-4 w-4 text-amber-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">基础下拉选项</CardTitle>
                        <CardDescription>
                          配置{firstCategoryLabel}、{secondCategoryLabel}与分类层级关系，以及第一页可选的价格带区间
                        </CardDescription>
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-4">
                    <div className="space-y-2">
                      <div className="flex items-center justify-between">
                        <div className="space-y-1">
                          <Label className="text-xs">层级树</Label>
                          <p className="text-xs text-muted-foreground">
                            支持一键下载模板并导入{firstCategoryLabel}、{secondCategoryLabel}、{thirdCategoryLabel}、{fourthCategoryLabel}、{fifthCategoryLabel}表格
                          </p>
                        </div>
                        <div className="flex flex-wrap items-center justify-end gap-2">
                          <span className="text-xs text-muted-foreground">
                            {brandStoreEntries.length} 个{firstCategoryLabel}
                          </span>
                          <Button
                            type="button"
                            variant="outline"
                            onClick={handleDownloadBrandTemplate}
                            className="h-8"
                          >
                            <Download className="mr-2 h-4 w-4" />
                            下载模板
                          </Button>
                          <Button
                            type="button"
                            variant="outline"
                            onClick={() => brandImportInputRef.current?.click()}
                            className="h-8"
                            disabled={isImportingBrandSheet}
                          >
                            {isImportingBrandSheet ? (
                              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                            ) : (
                              <Upload className="mr-2 h-4 w-4" />
                            )}
                            导入表格
                          </Button>
                          <Button
                            type="button"
                            variant="outline"
                            onClick={handleClearBrandTree}
                            className="h-8 border-destructive/25 text-destructive hover:border-destructive/40 hover:bg-destructive/10 hover:text-destructive"
                            disabled={brandStoreEntries.length === 0}
                          >
                            <Trash2 className="mr-2 h-4 w-4" />
                            清空当前数据
                          </Button>
                        </div>
                      </div>
                      <input
                        ref={brandImportInputRef}
                        type="file"
                        accept={AGENT_WORKFLOW_BRAND_IMPORT_ACCEPT}
                        className="hidden"
                        onChange={handleBrandSheetImport}
                      />
                      <div className="grid grid-cols-1 gap-3 rounded-xl border bg-background/70 p-3 md:grid-cols-2 xl:grid-cols-5">
                        <div className="space-y-2">
                          <Label className="text-xs">第一级名称</Label>
                          <Input
                            value={firstCategoryLabel}
                            onChange={(e) => handleCategoryLabelChange("firstCategory", e.target.value)}
                            placeholder="例如：品牌分类"
                          />
                        </div>
                        <div className="space-y-2">
                          <Label className="text-xs">第二级名称</Label>
                          <Input
                            value={secondCategoryLabel}
                            onChange={(e) => handleCategoryLabelChange("secondCategory", e.target.value)}
                            placeholder="例如：门店分类"
                          />
                        </div>
                        <div className="space-y-2">
                          <Label className="text-xs">第三级名称</Label>
                          <Input
                            value={thirdCategoryLabel}
                            onChange={(e) => handleCategoryLabelChange("thirdCategory", e.target.value)}
                            placeholder="例如：系列分类"
                          />
                        </div>
                        <div className="space-y-2">
                          <Label className="text-xs">第四级名称</Label>
                          <Input
                            value={fourthCategoryLabel}
                            onChange={(e) => handleCategoryLabelChange("fourthCategory", e.target.value)}
                            placeholder="例如：产品类型"
                          />
                        </div>
                        <div className="space-y-2">
                          <Label className="text-xs">第五级名称</Label>
                          <Input
                            value={fifthCategoryLabel}
                            onChange={(e) => handleCategoryLabelChange("fifthCategory", e.target.value)}
                            placeholder="例如：细分类目"
                          />
                        </div>
                      </div>
                      <div className="rounded-xl border bg-muted/10 p-3">
                        <div className="flex flex-col gap-2 sm:flex-row">
                          <Input
                            value={brandDraft}
                            onChange={(e) => setBrandDraft(e.target.value)}
                            onKeyDown={(e) => {
                              if (e.key === "Enter") {
                                e.preventDefault();
                                handleAddBrandEntry();
                              }
                            }}
                            placeholder={`输入一个${firstCategoryLabel}名称后点击添加`}
                          />
                          <Button
                            type="button"
                            onClick={handleAddBrandEntry}
                            className="shrink-0"
                          >
                            <Plus className="mr-2 h-4 w-4" />
                            添加{firstCategoryLabel}
                          </Button>
                        </div>

                        {brandStoreEntries.length > 0 ? (
                          <div className="mt-4 space-y-4">
                            {brandStoreEntries.map((entry) => (
                              <div key={entry.brandName} className="rounded-xl border bg-background/80 p-4">
                                <div className="flex flex-wrap items-center justify-between gap-3">
                                  <div className="flex items-center gap-2">
                                    <div className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm font-medium">
                                      <span>{entry.brandName}</span>
                                      <button
                                        type="button"
                                        onClick={() => handleRemoveBrandEntry(entry.brandName)}
                                        className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                        aria-label={`删除${firstCategoryLabel} ${entry.brandName}`}
                                      >
                                        <Trash2 className="h-3.5 w-3.5" />
                                      </button>
                                    </div>
                                    <span className="text-xs text-muted-foreground">
                                      {(entry.storeEntries || []).length} 个{secondCategoryLabel}
                                    </span>
                                  </div>
                                </div>

                                <div className="mt-3 rounded-xl border bg-muted/20 p-3">
                                  <div className="flex flex-col gap-2 sm:flex-row">
                                    <Input
                                      value={storeDrafts[entry.brandName] || ""}
                                      onChange={(e) =>
                                        setStoreDrafts((prev) => ({
                                          ...prev,
                                          [entry.brandName]: e.target.value,
                                        }))
                                      }
                                      onKeyDown={(e) => {
                                        if (e.key === "Enter") {
                                          e.preventDefault();
                                          handleAddStoreToBrand(entry.brandName);
                                        }
                                      }}
                                      placeholder={`给${firstCategoryLabel}“${entry.brandName}”添加${secondCategoryLabel}`}
                                    />
                                    <Button
                                      type="button"
                                      onClick={() => handleAddStoreToBrand(entry.brandName)}
                                      className="shrink-0"
                                      variant="outline"
                                    >
                                      <Plus className="mr-2 h-4 w-4" />
                                      添加{secondCategoryLabel}
                                    </Button>
                                  </div>

                                  {(entry.storeEntries || []).length > 0 ? (
                                    <div className="mt-3 space-y-3">
                                      {(entry.storeEntries || []).map((storeEntry) => {
                                        const draftKey = `${entry.brandName}::${storeEntry.storeName}`;
                                        return (
                                          <div
                                            key={`${entry.brandName}-${storeEntry.storeName}`}
                                            className="rounded-xl border bg-background/80 p-3"
                                          >
                                            <div className="flex flex-wrap items-center justify-between gap-3">
                                              <div className="flex items-center gap-2">
                                                <div className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm font-medium">
                                                  <span>{storeEntry.storeName}</span>
                                                  <button
                                                    type="button"
                                                    onClick={() =>
                                                      handleRemoveStoreFromBrand(
                                                        entry.brandName,
                                                        storeEntry.storeName
                                                      )
                                                    }
                                                    className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                                    aria-label={`删除${secondCategoryLabel} ${storeEntry.storeName}`}
                                                  >
                                                    <Trash2 className="h-3.5 w-3.5" />
                                                  </button>
                                                </div>
                                                <span className="text-xs text-muted-foreground">
                                                  {(storeEntry.thirdCategoryEntries || []).length} 个{thirdCategoryLabel}
                                                </span>
                                              </div>
                                            </div>

                                            <div className="mt-3 rounded-xl border bg-muted/20 p-3">
                                              <div className="flex flex-col gap-2 sm:flex-row">
                                                <Input
                                                  value={thirdCategoryDrafts[draftKey] || ""}
                                                  onChange={(e) =>
                                                    setThirdCategoryDrafts((prev) => ({
                                                      ...prev,
                                                      [draftKey]: e.target.value,
                                                    }))
                                                  }
                                                  onKeyDown={(e) => {
                                                    if (e.key === "Enter") {
                                                      e.preventDefault();
                                                      handleAddThirdCategoryToStore(
                                                        entry.brandName,
                                                        storeEntry.storeName
                                                      );
                                                    }
                                                  }}
                                                  placeholder={`给${secondCategoryLabel}“${storeEntry.storeName}”添加${thirdCategoryLabel}`}
                                                />
                                                <Button
                                                  type="button"
                                                  onClick={() =>
                                                    handleAddThirdCategoryToStore(
                                                      entry.brandName,
                                                      storeEntry.storeName
                                                    )
                                                  }
                                                  className="shrink-0"
                                                  variant="outline"
                                                >
                                                  <Plus className="mr-2 h-4 w-4" />
                                                  添加{thirdCategoryLabel}
                                                </Button>
                                              </div>

                                              {(storeEntry.thirdCategoryEntries || []).length > 0 ? (
                                                <div className="mt-3 space-y-3">
                                                  {(storeEntry.thirdCategoryEntries || []).map((thirdEntry) => {
                                                    const fourthDraftKey = createThirdCategoryDraftKey(
                                                      entry.brandName,
                                                      storeEntry.storeName,
                                                      thirdEntry.categoryName
                                                    );
                                                    return (
                                                      <div
                                                        key={`${entry.brandName}-${storeEntry.storeName}-${thirdEntry.categoryName}`}
                                                        className="rounded-xl border bg-background/80 p-3"
                                                      >
                                                        <div className="flex flex-wrap items-center justify-between gap-3">
                                                          <div className="flex items-center gap-2">
                                                            <div className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm font-medium">
                                                              <span>{thirdEntry.categoryName}</span>
                                                              <button
                                                                type="button"
                                                                onClick={() =>
                                                                  handleRemoveThirdCategoryFromStore(
                                                                    entry.brandName,
                                                                    storeEntry.storeName,
                                                                    thirdEntry.categoryName
                                                                  )
                                                                }
                                                                className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                                                aria-label={`删除${thirdCategoryLabel} ${thirdEntry.categoryName}`}
                                                              >
                                                                <Trash2 className="h-3.5 w-3.5" />
                                                              </button>
                                                            </div>
                                                            <span className="text-xs text-muted-foreground">
                                                              {(thirdEntry.fourthCategoryEntries || []).length} 个{fourthCategoryLabel}
                                                            </span>
                                                          </div>
                                                        </div>

                                                        <div className="mt-3 rounded-xl border bg-muted/20 p-3">
                                                          <div className="flex flex-col gap-2 sm:flex-row">
                                                            <Input
                                                              value={fourthCategoryDrafts[fourthDraftKey] || ""}
                                                              onChange={(e) =>
                                                                setFourthCategoryDrafts((prev) => ({
                                                                  ...prev,
                                                                  [fourthDraftKey]: e.target.value,
                                                                }))
                                                              }
                                                              onKeyDown={(e) => {
                                                                if (e.key === "Enter") {
                                                                  e.preventDefault();
                                                                  handleAddFourthCategoryToThirdCategory(
                                                                    entry.brandName,
                                                                    storeEntry.storeName,
                                                                    thirdEntry.categoryName
                                                                  );
                                                                }
                                                              }}
                                                              placeholder={`给${thirdCategoryLabel}“${thirdEntry.categoryName}”添加${fourthCategoryLabel}`}
                                                            />
                                                            <Button
                                                              type="button"
                                                              onClick={() =>
                                                                handleAddFourthCategoryToThirdCategory(
                                                                  entry.brandName,
                                                                  storeEntry.storeName,
                                                                  thirdEntry.categoryName
                                                                )
                                                              }
                                                              className="shrink-0"
                                                              variant="outline"
                                                            >
                                                              <Plus className="mr-2 h-4 w-4" />
                                                              添加{fourthCategoryLabel}
                                                            </Button>
                                                          </div>

                                                          {(thirdEntry.fourthCategoryEntries || []).length > 0 ? (
                                                            <div className="mt-3 space-y-3">
                                                              {(thirdEntry.fourthCategoryEntries || []).map(
                                                                (fourthEntry) => {
                                                                  const fifthDraftKey = createFourthCategoryDraftKey(
                                                                    entry.brandName,
                                                                    storeEntry.storeName,
                                                                    thirdEntry.categoryName,
                                                                    fourthEntry.categoryName
                                                                  );
                                                                  return (
                                                                    <div
                                                                      key={`${entry.brandName}-${storeEntry.storeName}-${thirdEntry.categoryName}-${fourthEntry.categoryName}`}
                                                                      className="rounded-xl border bg-background/80 p-3"
                                                                    >
                                                                      <div className="flex flex-wrap items-center justify-between gap-3">
                                                                        <div className="flex items-center gap-2">
                                                                          <div className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm font-medium">
                                                                            <span>{fourthEntry.categoryName}</span>
                                                                            <button
                                                                              type="button"
                                                                              onClick={() =>
                                                                                handleRemoveFourthCategoryFromThirdCategory(
                                                                                  entry.brandName,
                                                                                  storeEntry.storeName,
                                                                                  thirdEntry.categoryName,
                                                                                  fourthEntry.categoryName
                                                                                )
                                                                              }
                                                                              className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                                                              aria-label={`删除${fourthCategoryLabel} ${fourthEntry.categoryName}`}
                                                                            >
                                                                              <Trash2 className="h-3.5 w-3.5" />
                                                                            </button>
                                                                          </div>
                                                                          <span className="text-xs text-muted-foreground">
                                                                            {(fourthEntry.fifthCategories || []).length} 个{fifthCategoryLabel}
                                                                          </span>
                                                                        </div>
                                                                      </div>

                                                                      <div className="mt-3 rounded-xl border bg-muted/20 p-3">
                                                                        <div className="flex flex-col gap-2 sm:flex-row">
                                                                          <Input
                                                                            value={fifthCategoryDrafts[fifthDraftKey] || ""}
                                                                            onChange={(e) =>
                                                                              setFifthCategoryDrafts((prev) => ({
                                                                                ...prev,
                                                                                [fifthDraftKey]: e.target.value,
                                                                              }))
                                                                            }
                                                                            onKeyDown={(e) => {
                                                                              if (e.key === "Enter") {
                                                                                e.preventDefault();
                                                                                handleAddFifthCategoryToFourthCategory(
                                                                                  entry.brandName,
                                                                                  storeEntry.storeName,
                                                                                  thirdEntry.categoryName,
                                                                                  fourthEntry.categoryName
                                                                                );
                                                                              }
                                                                            }}
                                                                            placeholder={`给${fourthCategoryLabel}“${fourthEntry.categoryName}”添加${fifthCategoryLabel}`}
                                                                          />
                                                                          <Button
                                                                            type="button"
                                                                            onClick={() =>
                                                                              handleAddFifthCategoryToFourthCategory(
                                                                                entry.brandName,
                                                                                storeEntry.storeName,
                                                                                thirdEntry.categoryName,
                                                                                fourthEntry.categoryName
                                                                              )
                                                                            }
                                                                            className="shrink-0"
                                                                            variant="outline"
                                                                          >
                                                                            <Plus className="mr-2 h-4 w-4" />
                                                                            添加{fifthCategoryLabel}
                                                                          </Button>
                                                                        </div>

                                                                        {(fourthEntry.fifthCategories || []).length > 0 ? (
                                                                          <div className="mt-3 flex flex-wrap gap-2">
                                                                            {(fourthEntry.fifthCategories || []).map(
                                                                              (fifthCategory) => (
                                                                                <div
                                                                                  key={`${entry.brandName}-${storeEntry.storeName}-${thirdEntry.categoryName}-${fourthEntry.categoryName}-${fifthCategory}`}
                                                                                  className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm"
                                                                                >
                                                                                  <span>{fifthCategory}</span>
                                                                                  <button
                                                                                    type="button"
                                                                                    onClick={() =>
                                                                                      handleRemoveFifthCategoryFromFourthCategory(
                                                                                        entry.brandName,
                                                                                        storeEntry.storeName,
                                                                                        thirdEntry.categoryName,
                                                                                        fourthEntry.categoryName,
                                                                                        fifthCategory
                                                                                      )
                                                                                    }
                                                                                    className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                                                                    aria-label={`删除${fifthCategoryLabel} ${fifthCategory}`}
                                                                                  >
                                                                                    <Trash2 className="h-3.5 w-3.5" />
                                                                                  </button>
                                                                                </div>
                                                                              )
                                                                            )}
                                                                          </div>
                                                                        ) : (
                                                                          <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                                                                            这个{fourthCategoryLabel}下还没有添加任何{fifthCategoryLabel}。
                                                                          </div>
                                                                        )}
                                                                      </div>
                                                                    </div>
                                                                  );
                                                                }
                                                              )}
                                                            </div>
                                                          ) : (
                                                            <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                                                              这个{thirdCategoryLabel}下还没有添加任何{fourthCategoryLabel}。
                                                            </div>
                                                          )}
                                                        </div>
                                                      </div>
                                                    );
                                                  })}
                                                </div>
                                              ) : (
                                                <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                                                  这个{secondCategoryLabel}下还没有添加任何{thirdCategoryLabel}。
                                                </div>
                                              )}
                                            </div>
                                          </div>
                                        );
                                      })}
                                    </div>
                                  ) : (
                                    <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                                      这个{firstCategoryLabel}下还没有添加任何{secondCategoryLabel}。
                                    </div>
                                  )}
                                </div>
                              </div>
                            ))}
                          </div>
                        ) : (
                          <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                            还没有添加{firstCategoryLabel}。先添加{firstCategoryLabel}，再在每个{firstCategoryLabel}下继续添加{secondCategoryLabel}以及{thirdCategoryLabel}到{fifthCategoryLabel}。
                          </div>
                        )}
                      </div>
                    </div>

                    <div className="space-y-2">
                      <div className="flex items-center justify-between">
                        <Label className="text-xs">价格带区间</Label>
                        <span className="text-xs text-muted-foreground">
                          {priceBandOptions.length} 个区间
                        </span>
                      </div>
                      <div className="rounded-xl border bg-muted/10 p-3">
                        <div className="flex flex-col gap-2 sm:flex-row">
                          <Input
                            value={priceBandDraft}
                            onChange={(e) => setPriceBandDraft(e.target.value)}
                            onKeyDown={(e) => {
                              if (e.key === "Enter") {
                                e.preventDefault();
                                handleAddPriceBand();
                              }
                            }}
                            placeholder="例如：0-999元 / 1000-1999元"
                          />
                          <Button
                            type="button"
                            onClick={handleAddPriceBand}
                            className="shrink-0"
                            variant="outline"
                          >
                            <Plus className="mr-2 h-4 w-4" />
                            添加价格带
                          </Button>
                        </div>

                        {priceBandOptions.length > 0 ? (
                          <div className="mt-3 flex flex-wrap gap-2">
                            {priceBandOptions.map((priceBand) => (
                              <div
                                key={priceBand}
                                className="inline-flex items-center gap-2 rounded-full border bg-background px-3 py-1.5 text-sm"
                              >
                                <span>{priceBand}</span>
                                <button
                                  type="button"
                                  onClick={() => handleRemovePriceBand(priceBand)}
                                  className="rounded-full p-0.5 text-muted-foreground transition-colors hover:bg-muted hover:text-destructive"
                                  aria-label={`删除价格带 ${priceBand}`}
                                >
                                  <Trash2 className="h-3.5 w-3.5" />
                                </button>
                              </div>
                            ))}
                          </div>
                        ) : (
                          <div className="mt-3 rounded-lg border border-dashed bg-background/70 px-3 py-4 text-sm text-muted-foreground">
                            还没有添加价格带。添加后，第一页{firstCategoryLabel}和{secondCategoryLabel}右侧会显示价格带下拉框。
                          </div>
                        )}
                      </div>
                    </div>
                  </CardContent>
                </Card>
              </motion.div>

              <motion.div variants={itemVariants} className="lg:col-span-2">
                <Card className="mb-6">
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-emerald-500/10">
                        <Layers className="h-4 w-4 text-emerald-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">PSD 模板二级分类</CardTitle>
                        <CardDescription>
                          控制前台“选择模板”下拉是否按二级分类分组展示。
                        </CardDescription>
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent>
                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div>
                        <div className="text-sm font-medium">启用 PSD 模板二级分类</div>
                        <div className="text-xs text-muted-foreground">
                          开启后，用户前台会按模板配置里的二级分类分组显示；未填写分类的模板会归入“未分组”。
                        </div>
                      </div>
                      <Switch
                        checked={psdTemplateSecondaryCategoryConfig.enabled}
                        onCheckedChange={(checked) =>
                          setPsdTemplateSecondaryCategoryConfig({ enabled: checked })
                        }
                      />
                    </div>
                  </CardContent>
                </Card>

                <Card>
                  <CardHeader className="pb-4">
                    <div className="flex items-center gap-3">
                      <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-violet-500/10">
                        <Settings2 className="h-4 w-4 text-violet-600" />
                      </div>
                      <div>
                        <CardTitle className="text-base">PSD 文字颜色选项</CardTitle>
                        <CardDescription>
                          按{firstCategoryLabel}配置套用 PSD 模板时可选的两组文字颜色，前台会跟随当前{firstCategoryLabel}读取。
                        </CardDescription>
                      </div>
                    </div>
                  </CardHeader>
                  <CardContent className="space-y-4">
                    {psdTextColorBrandOptions.length > 0 ? (
                      <div className="space-y-2">
                        <Label className="text-xs">选择{firstCategoryLabel}</Label>
                        <SearchableSelect
                          value={selectedPsdTextColorBrand}
                          options={psdTextColorBrandOptions}
                          placeholder={`选择一个${firstCategoryLabel}后配置颜色`}
                          searchPlaceholder={`输入${firstCategoryLabel}名筛选`}
                          emptyText={`暂无${firstCategoryLabel}可选`}
                          onValueChange={setSelectedPsdTextColorBrand}
                        />
                        <p className="text-xs text-muted-foreground">
                          未单独配置的{firstCategoryLabel}会回退系统默认颜色；当前编辑{firstCategoryLabel}：{selectedPsdTextColorBrand}
                        </p>
                      </div>
                    ) : (
                      <div className="rounded-lg border border-dashed bg-muted/10 px-4 py-3 text-sm text-muted-foreground">
                        请先在上方“层级树”里配置{firstCategoryLabel}，再按{firstCategoryLabel}设置 PSD 文字颜色。
                      </div>
                    )}

                    <div className="flex items-center justify-between rounded-lg border bg-muted/20 px-4 py-3">
                      <div>
                        <div className="text-sm font-medium">
                          {selectedPsdTextColorBrand
                            ? `启用“${selectedPsdTextColorBrand}”PSD 文字双色切换`
                            : "启用 PSD 文字双色切换"}
                        </div>
                        <div className="text-xs text-muted-foreground">
                          开启后，用户在 PSD 模板编辑弹窗里可为当前品牌的文字图层选择两种预设颜色。
                        </div>
                      </div>
                      <Switch
                        checked={selectedBrandPsdTextColorConfig.enabled}
                        onCheckedChange={(checked) =>
                          updateSelectedBrandPsdTextColorConfig((current) => ({
                            enabled: checked,
                            colors: current.colors,
                          }))
                        }
                      />
                    </div>

                    <div className="grid gap-4 md:grid-cols-2">
                      {selectedBrandPsdTextColorConfig.colors.map((color, index) => (
                        <div
                          key={`psd-text-color-${index + 1}`}
                          className="rounded-xl border bg-muted/20 p-4"
                        >
                          <div className="mb-3 flex items-center justify-between gap-3">
                            <div>
                              <Label className="text-xs">{`颜色 ${index + 1}`}</Label>
                              <div className="mt-1 text-xs text-muted-foreground">
                                用户前台可直接选择这组文字颜色。
                              </div>
                            </div>
                            <div
                              className="h-10 w-10 rounded-full border shadow-sm"
                              style={{ backgroundColor: color }}
                            />
                          </div>
                          <div className="flex items-center gap-3">
                            <input
                              type="color"
                              value={color}
                              onChange={(event) =>
                                updatePsdTextColor(index as 0 | 1, event.target.value)
                              }
                              className="h-11 w-14 cursor-pointer rounded-lg border bg-transparent p-1"
                            />
                            <Input
                              value={color}
                              onChange={(event) =>
                                updatePsdTextColor(index as 0 | 1, event.target.value)
                              }
                              placeholder="#FFFFFF"
                              className="font-mono uppercase"
                            />
                          </div>
                        </div>
                      ))}
                    </div>
                  </CardContent>
                </Card>
              </motion.div>
            </motion.div>
          </TabsContent>

          {/* Models Tab */}
          <TabsContent value="models" className="space-y-6">
            <motion.div
              initial="hidden"
              animate="visible"
              variants={containerVariants}
            >
              <motion.div variants={itemVariants}>
                <Card>
                  <CardHeader>
                    <div className="flex items-center justify-between">
                      <div className="flex items-center gap-3">
                        <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-rose-500/10">
                          <UserCircle className="h-4 w-4 text-rose-600" />
                        </div>
                        <div>
                          <CardTitle className="text-base">{firstCategoryLabel}模特图库</CardTitle>
                          <CardDescription>
                            为每个{firstCategoryLabel}配置模特图，第二步会按{firstCategoryLabel}展示供用户选择
                          </CardDescription>
                        </div>
                      </div>
                      <Badge variant="secondary">
                        {brandModelConfig.entries.length} 个{firstCategoryLabel}
                      </Badge>
                    </div>
                  </CardHeader>
                  <CardContent>
                    {brandModelBrands.length > 0 ? (
                      <div className="space-y-4">
                        {brandModelBrands.map((brandName, index) => {
                          const refKey = `brand-model:${brandName}`;
                          const entry = brandModelConfig.entries.find((e) => e.brandName === brandName);
                          const images = entry?.images || [];
                          const isUploading = uploadingKey === refKey;

                          return (
                            <motion.div
                              key={brandName}
                              initial={{ opacity: 0, y: 10 }}
                              animate={{ opacity: 1, y: 0 }}
                              transition={{ delay: index * 0.05 }}
                              className="rounded-xl border bg-card/50 p-4"
                            >
                              <div className="flex items-center justify-between gap-4">
                                <div className="flex items-center gap-3">
                                  <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-muted font-mono text-sm font-medium">
                                    {brandName.charAt(0)}
                                  </div>
                                  <div>
                                    <div className="font-medium">{brandName}</div>
                                    <div className="text-xs text-muted-foreground">
                                      {images.length} 张模特图
                                    </div>
                                  </div>
                                </div>
                                <input
                                  ref={(el) => { fileInputRefs.current[refKey] = el; }}
                                  type="file"
                                  accept="image/*"
                                  multiple
                                  className="hidden"
                                  onChange={(e) => {
                                    void handleUploadBrandModelImages(brandName, e.target.files);
                                    e.target.value = "";
                                  }}
                                />
                                <Button
                                  type="button"
                                  variant="outline"
                                  size="sm"
                                  onClick={() => fileInputRefs.current[refKey]?.click()}
                                  disabled={isUploading}
                                >
                                  {isUploading ? (
                                    <Loader2 className="mr-2 h-4 w-4 animate-spin" />
                                  ) : (
                                    <Upload className="mr-2 h-4 w-4" />
                                  )}
                                  上传
                                </Button>
                              </div>

                              <AnimatePresence>
                                {images.length > 0 && (
                                  <motion.div
                                    initial={{ opacity: 0, height: 0 }}
                                    animate={{ opacity: 1, height: "auto" }}
                                    exit={{ opacity: 0, height: 0 }}
                                    className="mt-4 grid grid-cols-2 gap-3 sm:grid-cols-4 md:grid-cols-6"
                                  >
                                    {images.map((image) => (
                                      <div
                                        key={image.id}
                                        className="group relative aspect-square overflow-hidden rounded-lg border"
                                      >
                                        <img
                                          src={image.imageUrl}
                                          alt={image.displayName || `${brandName} 模特图`}
                                          className="h-full w-full object-cover"
                                        />
                                        <div className="absolute inset-0 bg-black/0 transition-colors group-hover:bg-black/40" />
                                        <button
                                          type="button"
                                          onClick={() => handleRemoveBrandModelImage(brandName, image.id)}
                                          className="absolute right-2 top-2 flex h-6 w-6 items-center justify-center rounded-full bg-white/90 text-destructive opacity-0 shadow-sm transition-opacity group-hover:opacity-100"
                                        >
                                          <Trash2 className="h-3 w-3" />
                                        </button>
                                      </div>
                                    ))}
                                  </motion.div>
                                )}
                              </AnimatePresence>
                            </motion.div>
                          );
                        })}
                      </div>
                    ) : (
                      <div className="flex flex-col items-center justify-center rounded-xl border border-dashed py-12">
                        <div className="flex h-12 w-12 items-center justify-center rounded-full bg-muted">
                          <Package className="h-6 w-6 text-muted-foreground" />
                        </div>
                        <p className="mt-4 text-sm text-muted-foreground">
                          先在“基础配置”中添加{firstCategoryLabel}，然后为每个{firstCategoryLabel}上传模特图
                        </p>
                      </div>
                    )}
                  </CardContent>
                </Card>
              </motion.div>
            </motion.div>
          </TabsContent>

          {/* Categories Tab */}
          <TabsContent value="categories" className="space-y-6">
            <motion.div
              initial="hidden"
              animate="visible"
              variants={containerVariants}
              className="space-y-4"
            >
              <motion.div variants={itemVariants} className="flex flex-wrap items-center justify-between gap-3">
                <div className="flex flex-wrap items-center gap-2">
                  <Badge variant="outline" className="font-mono">
                    {enabledPresetLibrarySectionCount} 分类页
                  </Badge>
                  <Badge variant="outline" className="font-mono">
                    {totalPresetLibraryNodeCount} 树节点
                  </Badge>
                  <Badge variant="secondary">“我的模式”固定保留，不在此处编辑</Badge>
                </div>
                <Button onClick={handleAddPresetLibrarySection} size="sm">
                  <Plus className="mr-2 h-4 w-4" />
                  新增分类页
                </Button>
              </motion.div>

              {sortedPresetLibrarySections.length > 0 ? (
                sortedPresetLibrarySections.map((section, index) =>
                  renderPresetLibrarySectionCard(section, index)
                )
              ) : (
                <motion.div variants={itemVariants}>
                  <Card>
                    <CardContent className="flex flex-col items-center justify-center py-16">
                      <div className="flex h-16 w-16 items-center justify-center rounded-full bg-muted">
                        <Package className="h-8 w-8 text-muted-foreground" />
                      </div>
                      <p className="mt-4 text-lg font-medium">还没有配置生图分类页</p>
                      <p className="text-sm text-muted-foreground">
                        点击上方按钮开始新增一个可展示的生图模式分类页
                      </p>
                    </CardContent>
                  </Card>
                </motion.div>
              )}
            </motion.div>
          </TabsContent>

          {/* Workflow Tab */}
          <TabsContent value="workflow" className="space-y-6">
            <motion.div
              initial="hidden"
              animate="visible"
              variants={containerVariants}
              className="space-y-4"
            >
              <motion.div
                variants={itemVariants}
                className="flex flex-col gap-3 lg:flex-row lg:items-center lg:justify-between"
              >
                <div className="flex flex-wrap items-center gap-2">
                  <Badge variant="outline" className="font-mono">
                    {countAgentWorkflowSteps(sortedSteps)} 模块
                  </Badge>
                  <Badge variant="outline" className="font-mono">
                    {countAgentWorkflowOptions(sortedSteps)} 选项
                  </Badge>
                  <Badge variant={workflowConstraintSettings.crossLevelMutualExclusionEnabled ? "default" : "secondary"}>
                    {workflowConstraintSettings.crossLevelMutualExclusionEnabled ? "跨级互斥已开启" : "跨级互斥已关闭"}
                  </Badge>
                </div>
                <div className="flex flex-col gap-3 sm:flex-row sm:items-center">
                  <div className="flex items-start justify-between gap-4 rounded-lg border bg-background px-4 py-3 sm:min-w-[380px]">
                    <div className="space-y-1">
                      <div className="text-sm font-medium">跨级互斥</div>
                      <div className="text-xs leading-5 text-muted-foreground">
                        关闭时仅允许同级卡片互斥；开启后任意级别卡片都可以互相限制。
                      </div>
                    </div>
                    <Switch
                      checked={workflowConstraintSettings.crossLevelMutualExclusionEnabled}
                      onCheckedChange={(checked) =>
                        setConfig((prev) => ({
                          ...prev,
                          constraintSettings: {
                            ...(prev.constraintSettings || defaultAgentWorkflowConstraintSettings),
                            crossLevelMutualExclusionEnabled: checked,
                          },
                        }))
                      }
                    />
                  </div>
                  <Button onClick={() => handleAddStep()} size="sm">
                    <Plus className="mr-2 h-4 w-4" />
                    新增一级模块
                  </Button>
                  <Button
                    type="button"
                    variant="outline"
                    size="sm"
                    disabled={!canPasteCopiedWorkflowStepAsRoot}
                    onClick={() => handlePasteWorkflowStep(null)}
                  >
                    <ClipboardPaste className="mr-2 h-4 w-4" />
                    粘贴为一级模块
                  </Button>
                </div>
              </motion.div>

              {renderWorkflowStepDropZone(null, "inside")}

              {sortedSteps.length > 0 ? (
                sortedSteps.map((step, stepIndex) =>
                  renderWorkflowStepCard(step, 1, [stepIndex + 1], sortedSteps.length)
                )
              ) : (
                <motion.div variants={itemVariants}>
                  <Card>
                    <CardContent className="flex flex-col items-center justify-center py-16">
                      <div className="flex h-16 w-16 items-center justify-center rounded-full bg-muted">
                        <Layers className="h-8 w-8 text-muted-foreground" />
                      </div>
                      <p className="mt-4 text-lg font-medium">还没有配置工作流模块</p>
                      <p className="text-sm text-muted-foreground">
                        点击上方按钮开始创建第一个一级模块
                      </p>
                    </CardContent>
                  </Card>
                </motion.div>
              )}
            </motion.div>
          </TabsContent>
        </Tabs>
      </main>
    </div>
  );
}