fix: preserve selected canvas slot context

components/canvas/CanvasChatPanel.tsx

@@ -115,7 +115,10 @@ import {
   shouldDeferCanvasAgentViewOperation,
 } from "@/lib/canvas/agent-view-interaction-guard";
 import { getCanvasAgentOperationErrorMessage } from "@/lib/canvas/agent-operation-errors";
-import { shouldBypassCanvasImagePointsPrecheckForAgentControl } from "@/lib/canvas/agent-client-intent";
+import {
+  shouldBypassCanvasImagePointsPrecheckForAgentControl,
+  shouldPreserveCanvasAgentSlotOnlyContext,
+} from "@/lib/canvas/agent-client-intent";
 import { getCanvasSkillIconComponent } from "@/components/canvas/canvas-skill-icons";
 import { ImageParamsBar, type ImageGenerationParams } from "@/components/image-params-bar";
 import { VideoParamsBar, type VideoGenerationParams } from "@/components/video-params-bar";
@@ -5941,6 +5944,20 @@ export function CanvasChatPanel({
         isDetailGenerationMode,
         agentEnabled: effectiveAgentEnabled,
       });
+    const selectedAgentSlotCountForContext = nodes.filter(
+      (node) => String(node.type) === "agent-slot" && selectedNodeIdSet.has(node.id)
+    ).length;
+    const shouldPreserveSelectedSlotContext =
+      shouldPreserveCanvasAgentSlotOnlyContext({
+        text: input,
+        activeComposerMode: effectiveComposerMode,
+        selectedAgentSlotCount: selectedAgentSlotCountForContext,
+        attachmentCount: attachments.length,
+        hasSkillTag: Boolean(selectedSkillTag),
+        hasWorkflowContext,
+        isDetailGenerationMode,
+        agentEnabled: effectiveAgentEnabled,
+      });
     const selectedImageNodesForContext = Array.from(
       new Map(
         [
@@ -5955,7 +5972,8 @@ export function CanvasChatPanel({
     if (
       shouldIsolateDirectModeContext &&
       selectedImageNodesForContext.length === 0 &&
-      !shouldPreserveCanvasControlContext
+      !shouldPreserveCanvasControlContext &&
+      !shouldPreserveSelectedSlotContext
     ) {
       generationAnchorNodesRef.current = [];
       return undefined;

lib/canvas/agent-client-intent.ts

@@ -15,6 +15,9 @@ const CANVAS_AGENT_VIEW_CONTROL_REGEX =
 const CANVAS_AGENT_SLOT_MANAGEMENT_REGEX =
   /(新建|创建|添加|插入|放置|加一个|建一个).{0,10}(图片|视频|ui|画面|空)?(槽位|slot|空框|占位框|框)|(槽位|slot|空框|占位框).{0,10}(新建|创建|添加|插入|放置)/i;
 
+const CANVAS_AGENT_SLOT_FILL_CONTEXT_REGEX =
+  /(填充|生成|生图|出图|画一张|来一张|做一张|做图|做视频|视频生成|生成视频|放到|放进|放入|在这里|这个空框|这个槽位|选中槽位|槽位|slot|空框|占位框)/i;
+
 const CANVAS_AGENT_STRUCTURAL_OPERATION_REGEX =
   /(删除|移除|移动|挪动|排列|对齐|重命名|改名|连线|连接|添加批注|批注|备注|标注|添加文字|文字节点|更新文字|修改文字).{0,14}(画布|节点|对象|元素|图片|图|文本|便签|选中|这些|它们|这个)|(画布|节点|对象|元素|图片|图|文本|便签|选中|这些|它们|这个).{0,14}(删除|移除|移动|挪动|排列|对齐|重命名|改名|连线|连接|添加批注|批注|备注|标注|添加文字|文字节点|更新文字|修改文字)/i;
 
@@ -29,6 +32,12 @@ export function hasCanvasAgentNonGenerativeControlIntent(value: unknown) {
   );
 }
 
+export function hasCanvasAgentSlotFillContextIntent(value: unknown) {
+  const text = normalizeCanvasAgentClientIntentText(value);
+  if (!text) return false;
+  return CANVAS_AGENT_SLOT_FILL_CONTEXT_REGEX.test(text);
+}
+
 export function shouldBypassCanvasImagePointsPrecheckForAgentControl(params: {
   text: unknown;
   activeComposerMode?: string | null;
@@ -46,3 +55,23 @@ export function shouldBypassCanvasImagePointsPrecheckForAgentControl(params: {
   }
   return hasCanvasAgentNonGenerativeControlIntent(params.text);
 }
+
+export function shouldPreserveCanvasAgentSlotOnlyContext(params: {
+  text: unknown;
+  activeComposerMode?: string | null;
+  selectedAgentSlotCount?: number;
+  attachmentCount?: number;
+  hasSkillTag?: boolean;
+  hasWorkflowContext?: boolean;
+  isDetailGenerationMode?: boolean;
+  agentEnabled?: boolean;
+}) {
+  if ((params.selectedAgentSlotCount || 0) <= 0) return false;
+  if (params.activeComposerMode === "agent") return true;
+  if (params.agentEnabled === false) return false;
+  if ((params.attachmentCount || 0) > 0) return false;
+  if (params.hasSkillTag || params.hasWorkflowContext || params.isDetailGenerationMode) {
+    return false;
+  }
+  return hasCanvasAgentSlotFillContextIntent(params.text);
+}

tests/routes/canvas-chat-helpers.test.ts

@@ -116,7 +116,9 @@ import {
 } from "@/lib/canvas/canvas-save-request";
 import { canvasService } from "@/services/canvas";
 import {
+  hasCanvasAgentSlotFillContextIntent,
   hasCanvasAgentNonGenerativeControlIntent,
+  shouldPreserveCanvasAgentSlotOnlyContext,
   shouldBypassCanvasImagePointsPrecheckForAgentControl,
 } from "@/lib/canvas/agent-client-intent";
 import {
@@ -312,6 +314,46 @@ test.describe("canvas chat pure helpers", () => {
     ).toBe(true);
   });
 
+  test("preserves selected slot-only canvas context for fill and generation intents", () => {
+    expect(hasCanvasAgentSlotFillContextIntent("在这里生成一张主图")).toBe(true);
+    expect(hasCanvasAgentSlotFillContextIntent("填充这个槽位")).toBe(true);
+    expect(hasCanvasAgentSlotFillContextIntent("普通聊天")).toBe(false);
+
+    expect(
+      shouldPreserveCanvasAgentSlotOnlyContext({
+        text: "在这里生成一张主图",
+        activeComposerMode: "image",
+        selectedAgentSlotCount: 1,
+        agentEnabled: true,
+      })
+    ).toBe(true);
+    expect(
+      shouldPreserveCanvasAgentSlotOnlyContext({
+        text: "生成一张主图",
+        activeComposerMode: "image",
+        selectedAgentSlotCount: 0,
+        agentEnabled: true,
+      })
+    ).toBe(false);
+    expect(
+      shouldPreserveCanvasAgentSlotOnlyContext({
+        text: "在这里生成一张主图",
+        activeComposerMode: "image",
+        selectedAgentSlotCount: 1,
+        attachmentCount: 1,
+        agentEnabled: true,
+      })
+    ).toBe(false);
+    expect(
+      shouldPreserveCanvasAgentSlotOnlyContext({
+        text: "任意 agent 模式文本",
+        activeComposerMode: "agent",
+        selectedAgentSlotCount: 1,
+        agentEnabled: false,
+      })
+    ).toBe(true);
+  });
+
   test("rejects stale autosave bases without blocking fresh or missing revisions", () => {
     const currentUpdatedAt = new Date("2026-06-22T00:00:05.500Z");