From 7ac5bdf44f16bbde19cbc786ba69a1ff188850fd Mon Sep 17 00:00:00 2001
From: Your Name <your.email@example.com>
Date: Wed, 3 Jun 2026 16:47:50 +0800
Subject: [PATCH] fix: harden detail replacement page routing

---
 .../api/chat/_lib/detail-replacement.ts       | 525 ++++++++++++++++--
 app/(chat)/api/chat/route.ts                  |   6 +
 2 files changed, 492 insertions(+), 39 deletions(-)

diff --git a/app/(chat)/api/chat/_lib/detail-replacement.ts b/app/(chat)/api/chat/_lib/detail-replacement.ts
index a1f19af30..9f82da663 100644
--- a/app/(chat)/api/chat/_lib/detail-replacement.ts
+++ b/app/(chat)/api/chat/_lib/detail-replacement.ts
@@ -279,9 +279,6 @@ export async function normalizeReplacementResultImage(params: {
     generatedMetadata.width && generatedMetadata.height
       ? generatedMetadata.width / generatedMetadata.height
       : null;
-  const shouldCropTallComposite =
-    Boolean(targetAspectRatio && generatedAspectRatio) &&
-    Number(generatedAspectRatio) < Number(targetAspectRatio) * 0.78;
   const shouldFillSceneCanvas =
     params.scenePlan?.promptPackPolicy !== "forbid" &&
     (params.scenePlan?.generationRoute === "prompt_pack_scene" ||
@@ -292,6 +289,10 @@ export async function normalizeReplacementResultImage(params: {
       params.scenePlan?.textPolicy === "lock" ||
       params.scenePlan?.generationRoute === "copy_locked_regenerate" ||
       params.scenePlan?.generationRoute === "layout_preserve_replace");
+  const shouldCropTallComposite =
+    !shouldPreserveFullGeneratedCanvas &&
+    Boolean(targetAspectRatio && generatedAspectRatio) &&
+    Number(generatedAspectRatio) < Number(targetAspectRatio) * 0.78;
   const resizeFit = shouldCropTallComposite
     ? "cover"
     : shouldPreserveFullGeneratedCanvas
@@ -343,6 +344,16 @@ export type DetailReplacementPeoplePolicy =
   | "none"
   | "preserve_relation"
   | "require_user_model";
+export type DetailReplacementPageKind =
+  | "prompt_pack_scene"
+  | "white_scene"
+  | "white_layout"
+  | "copy_locked"
+  | "people_scene"
+  | "action_poster"
+  | "dimension_spec"
+  | "material_detail"
+  | "unknown";
 
 export type NormalizedAgentModeSourceImage = {
   url: string;
@@ -369,6 +380,7 @@ export type ReplacementReferenceDecision = {
 };
 
 export type ReplacementScenePlan = {
+  pageKind: DetailReplacementPageKind;
   generationRoute: DetailReplacementGenerationRoute;
   promptPackPolicy: DetailReplacementPromptPackPolicy;
   textPolicy: DetailReplacementTextPolicy;
@@ -401,10 +413,14 @@ type ReplacementReferenceDecisionCore = Omit<
 
 const DETAIL_HARD_LAYOUT_HINT_PATTERN =
   /产品尺寸|尺寸|规格|参数|单位|厘米|\bcm\b|产品说明|说明图|信息图|参数图|规格图|材质标注|工艺标注|结构标注|功能图标|图标说明|尺寸标注|承重参数|安装说明|标签图|卖点卡|白底产品|白底参数|白底规格/i;
+const DETAIL_DIMENSION_LAYOUT_HINT_PATTERN =
+  /产品尺寸|尺寸图|尺寸说明|尺寸标注|尺寸线|标尺|长宽高|宽度|高度|深度|单位[:：]?\s*(cm|厘米)|\bcm\b|160\s*\/\s*180\s*\/\s*210/i;
 const DETAIL_STRONG_COPY_HINT_PATTERN =
   /白底|浅色底|产品说明|参数|规格|尺寸|卖点|标签|说明图|信息图|海报|版式|排版|文字|标题|编号|标注|材质标注|工艺标注|代名词|典雅|高贵/i;
+const DETAIL_REFERENCE_POSTER_ACTION_HINT_PATTERN =
+  /动作海报|测试海报|测试图|来张自拍|自拍|合照|多人围坐|围坐|聚餐|多人聚餐|横向受力|受力测试|单侧承重|承重测试|重心|依旧平稳|依然稳固|试坐|坐在桌|坐桌|坐上桌/i;
 const DETAIL_PEOPLE_ACTION_HINT_PATTERN =
-  /自拍|合照|拍照|拿手机|手机自拍|聚会|好友|朋友|闺蜜|夫妻|情侣|家庭|亲子|陪伴|举杯|互动|模特|人物|人像|多人|人群|男士|女士|男人|女人|男生|女生|小孩|儿童|宝宝|顾客|吃饭的人|用餐的人|正在吃饭|坐在|坐着|站在|走动|行走|手持|试坐|倚靠|承重|受力|测试|稳定|稳固|使用产品|产品使用|体验/i;
+  /自拍|合照|拍照|拿手机|手机自拍|聚会|聚餐|围坐|好友|朋友|闺蜜|夫妻|情侣|家庭|亲子|陪伴|举杯|互动|模特|人物|人像|多人|人群|男士|女士|男人|女人|男生|女生|小孩|儿童|宝宝|顾客|吃饭的人|用餐的人|正在吃饭|坐在|坐着|站在|走动|行走|手持|试坐|倚靠|承重|受力|受力测试|重心|测试|稳定|稳固|使用产品|产品使用|体验/i;
 
 export type ReplacementScenePlanningRuntime =
   | {
@@ -490,6 +506,20 @@ function ensureDetailReferenceGenerates<T extends ReplacementReferenceDecisionCo
         scenePlan.generationRoute === "direct_passthrough"
           ? inferPromptPackPolicy(forcedRoute)
           : scenePlan.promptPackPolicy,
+      pageKind:
+        scenePlan.generationRoute === "direct_passthrough" ||
+        scenePlan.pageKind === "unknown"
+          ? inferDetailPageKind({
+              route: forcedRoute,
+              promptPackPolicy: inferPromptPackPolicy(forcedRoute),
+              textPolicy: scenePlan.textPolicy,
+              peoplePolicy: scenePlan.peoplePolicy,
+              whiteBackgroundLikely: scenePlan.whiteBackgroundLikely,
+              copyImageCoupled: scenePlan.copyImageCoupled,
+              hasDimensionLayoutHint: false,
+              hasReferencePosterActionHint: false,
+            })
+          : scenePlan.pageKind,
       textPolicy: scenePlan.textPolicy === "free" ? "preserve" : scenePlan.textPolicy,
       routeReason:
         scenePlan.generationRoute === "direct_passthrough" || !decision.shouldReplace
@@ -655,6 +685,158 @@ function normalizePeoplePolicy(value: unknown): DetailReplacementPeoplePolicy |
   return null;
 }
 
+function normalizeDetailPageKind(value: unknown): DetailReplacementPageKind | null {
+  const normalized = String(value || "")
+    .trim()
+    .toLowerCase()
+    .replace(/[\s-]+/g, "_");
+  if (!normalized) {
+    return null;
+  }
+  if (
+    [
+      "prompt_pack_scene",
+      "generic_scene",
+      "scene",
+      "space_scene",
+      "场景图",
+      "通用场景",
+      "吃词包场景",
+    ].includes(normalized)
+  ) {
+    return "prompt_pack_scene";
+  }
+  if (
+    [
+      "white_scene",
+      "light_scene",
+      "bright_scene",
+      "白场景",
+      "浅色场景",
+      "白色真实场景",
+    ].includes(normalized)
+  ) {
+    return "white_scene";
+  }
+  if (
+    [
+      "white_layout",
+      "layout",
+      "white_background_layout",
+      "white_poster",
+      "info_layout",
+      "白底说明",
+      "白底排版",
+      "说明页",
+    ].includes(normalized)
+  ) {
+    return "white_layout";
+  }
+  if (
+    [
+      "copy_locked",
+      "copy_locked_regenerate",
+      "text_locked",
+      "text_image_coupled",
+      "strong_copy",
+      "强文案",
+      "图文绑定",
+    ].includes(normalized)
+  ) {
+    return "copy_locked";
+  }
+  if (
+    [
+      "people_scene",
+      "people_relation",
+      "people_relation_locked",
+      "model_scene",
+      "人物场景",
+      "模特场景",
+    ].includes(normalized)
+  ) {
+    return "people_scene";
+  }
+  if (
+    [
+      "action_poster",
+      "action_test_poster",
+      "test_poster",
+      "people_action_poster",
+      "动作海报",
+      "测试海报",
+      "承重海报",
+    ].includes(normalized)
+  ) {
+    return "action_poster";
+  }
+  if (
+    [
+      "dimension_spec",
+      "dimension_layout",
+      "size_spec",
+      "size_chart",
+      "product_dimension",
+      "尺寸说明",
+      "产品尺寸",
+      "尺寸图",
+    ].includes(normalized)
+  ) {
+    return "dimension_spec";
+  }
+  if (
+    [
+      "material_detail",
+      "material_layout",
+      "material_spec",
+      "材质说明",
+      "板材说明",
+      "材料细节",
+    ].includes(normalized)
+  ) {
+    return "material_detail";
+  }
+  if (["unknown", "other", "其他", "未知"].includes(normalized)) {
+    return "unknown";
+  }
+  return null;
+}
+
+function inferDetailPageKind(params: {
+  route: DetailReplacementGenerationRoute;
+  promptPackPolicy?: DetailReplacementPromptPackPolicy;
+  textPolicy?: DetailReplacementTextPolicy;
+  peoplePolicy?: DetailReplacementPeoplePolicy;
+  whiteBackgroundLikely: boolean;
+  copyImageCoupled: boolean;
+  hasDimensionLayoutHint: boolean;
+  hasReferencePosterActionHint: boolean;
+  visualProfile?: ReplacementReferenceVisualProfile | null;
+}): DetailReplacementPageKind {
+  if (params.hasDimensionLayoutHint) {
+    return "dimension_spec";
+  }
+  if (params.hasReferencePosterActionHint) {
+    return "action_poster";
+  }
+  if (params.route === "people_relation_locked") {
+    return params.promptPackPolicy === "forbid" ? "action_poster" : "people_scene";
+  }
+  if (params.route === "copy_locked_regenerate" || params.copyImageCoupled) {
+    return "copy_locked";
+  }
+  if (params.route === "layout_preserve_replace") {
+    return params.whiteBackgroundLikely ? "white_layout" : "material_detail";
+  }
+  if (params.visualProfile?.likelyWhiteScene && !params.visualProfile?.likelyWhiteLayout) {
+    return "white_scene";
+  }
+  if (params.route === "prompt_pack_scene") {
+    return "prompt_pack_scene";
+  }
+  return "unknown";
+}
+
 function inferDetailGenerationRoute(params: {
   shouldReplace: boolean;
   isProductOnly: boolean;
@@ -715,6 +897,7 @@ function inferPeoplePolicy(params: {
 
 function planTextForPolicyGuards(scenePlan: ReplacementScenePlan) {
   return [
+    scenePlan.pageKind,
     scenePlan.sceneSummary,
     scenePlan.cameraSummary,
     scenePlan.placementSummary,
@@ -758,11 +941,25 @@ function applyDetailReplacementScenePlanGuards(
 
   const isProductOnly = params.replacementStrategy === "product_only";
   const planText = planTextForPolicyGuards(scenePlan);
+  const pageKind = scenePlan.pageKind || "unknown";
   const alreadyAllowsPromptPack =
     scenePlan.generationRoute === "prompt_pack_scene" &&
     scenePlan.promptPackPolicy !== "forbid";
-  const hasHardLayoutHint = DETAIL_HARD_LAYOUT_HINT_PATTERN.test(planText);
-  const hasPeopleActionHint = DETAIL_PEOPLE_ACTION_HINT_PATTERN.test(planText);
+  const shouldTrustPromptPackPageKind = pageKind === "prompt_pack_scene";
+  const shouldTrustPromptPackRoute =
+    shouldTrustPromptPackPageKind && alreadyAllowsPromptPack;
+  const hasDimensionLayoutHint =
+    pageKind === "dimension_spec" ||
+    (!shouldTrustPromptPackPageKind &&
+      DETAIL_DIMENSION_LAYOUT_HINT_PATTERN.test(planText));
+  const hasHardLayoutHint =
+    !shouldTrustPromptPackPageKind && DETAIL_HARD_LAYOUT_HINT_PATTERN.test(planText);
+  const hasReferencePosterActionHint =
+    pageKind === "action_poster" ||
+    (!shouldTrustPromptPackPageKind &&
+      DETAIL_REFERENCE_POSTER_ACTION_HINT_PATTERN.test(planText));
+  const hasPeopleActionHint =
+    !shouldTrustPromptPackPageKind && DETAIL_PEOPLE_ACTION_HINT_PATTERN.test(planText);
   const hasPeopleSignals =
     !isProductOnly &&
     (params.containsPeople ||
@@ -776,8 +973,15 @@ function applyDetailReplacementScenePlanGuards(
   const visualProfileSuggestsLightBase =
     params.visualProfile?.likelyWhiteScene === true ||
     params.visualProfile?.likelyWhiteLayout === true;
+  const shouldProtectDimensionLayout = !isProductOnly && hasDimensionLayoutHint;
+  const shouldProtectReferencePosterAction =
+    !isProductOnly &&
+    hasPeopleSignals &&
+    !shouldProtectDimensionLayout &&
+    hasReferencePosterActionHint;
   const scenePlanSuggestsWhiteLayout =
-    scenePlan.whiteBackgroundLikely &&
+    (pageKind === "white_layout" ||
+      scenePlan.whiteBackgroundLikely) &&
     !visualProfileSuggestsWhiteScene &&
     !hasPeopleSignals &&
     (hasHardLayoutHint ||
@@ -785,30 +989,130 @@ function applyDetailReplacementScenePlanGuards(
   const shouldProtectWhiteLayout =
     !isProductOnly &&
     !hasPeopleSignals &&
-    ((visualProfileSuggestsWhiteLayout &&
-      (hasHardLayoutHint ||
-        (scenePlan.copyImageCoupled && scenePlan.textPolicy === "lock"))) ||
+    (pageKind === "white_layout" ||
+      (visualProfileSuggestsWhiteLayout &&
+        (hasHardLayoutHint ||
+          (scenePlan.copyImageCoupled && scenePlan.textPolicy === "lock"))) ||
       scenePlanSuggestsWhiteLayout ||
       (hasHardLayoutHint && !visualProfileSuggestsWhiteScene));
   const shouldProtectWhiteScene =
     !isProductOnly &&
     !shouldProtectWhiteLayout &&
-    visualProfileSuggestsLightBase;
+    (pageKind === "white_scene" || visualProfileSuggestsLightBase);
   const shouldProtectPeople =
     !isProductOnly &&
     (hasPeopleSignals || (!alreadyAllowsPromptPack && scenePlan.peoplePolicy !== "none"));
   const shouldLockCopy =
     !isProductOnly &&
     (scenePlan.copyImageCoupled ||
-      params.hasImportantText ||
-      scenePlan.textPolicy === "lock" ||
-      hasHardLayoutHint);
+      pageKind === "copy_locked" ||
+      shouldProtectDimensionLayout ||
+      (!shouldTrustPromptPackRoute &&
+        (params.hasImportantText ||
+          scenePlan.textPolicy === "lock" ||
+          hasHardLayoutHint)));
 
   let next: ReplacementScenePlan = { ...scenePlan };
 
-  if (shouldProtectPeople && shouldProtectWhiteLayout) {
+  if (shouldProtectDimensionLayout) {
     next = {
       ...next,
+      pageKind: "dimension_spec",
+      generationRoute: "layout_preserve_replace",
+      promptPackPolicy: "forbid",
+      textPolicy: "lock",
+      peoplePolicy: "none",
+      useModelImage: false,
+      modelImageReason: params.hasModelImage
+        ? "产品尺寸说明页不使用模特图，必须以产品抠图和尺寸标注为主。"
+        : next.modelImageReason,
+      routeReason: appendUniqueInstruction(
+        next.routeReason,
+        "命中产品尺寸/单位/尺寸线说明页，按白底抠图尺寸标注处理，禁止套用场景词包。",
+        240,
+      ),
+      sceneSummary: appendUniqueInstruction(
+        next.sceneSummary,
+        "产品主体应抠出在白底或米白底上展示，保留产品外轮廓、比例、透视角度和尺寸标注关系。",
+        260,
+      ),
+      generationPrompt: appendUniqueInstruction(
+        next.generationPrompt,
+        "本屏是产品尺寸说明图：不使用前置词包；必须把产品主体抠出放在干净白底/米白底上，保留标题“产品尺寸”、单位 cm、尺寸箭头/尺寸线/数字标注和原版式位置；产品形状、桌面比例、边角圆角、腿部结构、透视角度必须跟参考图一致；禁止生成厨房、餐桌椅组合、室内背景、人物、软装或多余道具。",
+      ),
+      avoidSummary: appendUniqueInstruction(
+        next.avoidSummary,
+        "不要把尺寸页做成室内场景，不要新增椅子、柜体、灯具、花瓶或人物，不要改变产品形状，不要丢失尺寸线和单位。",
+        320,
+      ),
+      whiteBackgroundLikely: true,
+      copyImageCoupled: true,
+    };
+  } else if (shouldProtectReferencePosterAction) {
+    next = {
+      ...next,
+      pageKind: "action_poster",
+      generationRoute: "people_relation_locked",
+      promptPackPolicy: "forbid",
+      textPolicy: next.textPolicy === "free" ? "lock" : next.textPolicy,
+      peoplePolicy: "preserve_relation",
+      useModelImage: params.hasModelImage,
+      modelImageReason: params.hasModelImage
+        ? next.modelImageReason ||
+          "参考图是带明确人物动作的详情海报，模特图只用于人物身份/气质参考，不能覆盖参考图人数、动作和版式。"
+        : next.modelImageReason ||
+          "参考图是带明确人物动作的详情海报，必须按参考图人数、动作、姿态和版式生成类似图。",
+      routeReason: appendUniqueInstruction(
+        next.routeReason,
+        "命中多人围坐/承重测试等参考动作海报，参考图语义优先，禁止套用前置场景词包。",
+        240,
+      ),
+      sceneSummary: appendUniqueInstruction(
+        next.sceneSummary,
+        "按参考图做同版式类似图：保留人物数量、围坐/试坐/承重动作、产品形状、机位和图文关系，只做必要产品/材质/视觉区替换。",
+        320,
+      ),
+      generationPrompt: appendUniqueInstruction(
+        next.generationPrompt,
+        "本屏是参考动作海报，不使用前置词包；标题/标签中的“多人围坐、聚餐、横向受力测试、单侧承重、重心平稳”等语义是硬约束。必须根据参考图做一张同版式、同动作、同人物关系的类似详情图：多人就保持多人围坐，承重就保持人物坐在产品上的受力姿态；产品主体的形状、外轮廓、长宽比例、桌面圆角、腿部结构和透视角度必须跟参考图一致。禁止生成无关餐厨空间、走动路人、无人空场景或改成另一种产品形状。",
+      ),
+      avoidSummary: appendUniqueInstruction(
+        next.avoidSummary,
+        "不要让前置厨房/餐厨/软装词包覆盖参考动作，不要把多人改成单人或无人，不要把坐姿/承重动作改成走动人物，不要改变产品形状。",
+        340,
+      ),
+      whiteBackgroundLikely: next.whiteBackgroundLikely || visualProfileSuggestsLightBase,
+      copyImageCoupled: true,
+    };
+  } else if (
+    pageKind === "prompt_pack_scene" &&
+    !shouldProtectWhiteLayout &&
+    !shouldProtectPeople &&
+    !shouldLockCopy
+  ) {
+    next = {
+      ...next,
+      pageKind: "prompt_pack_scene",
+      generationRoute: "prompt_pack_scene",
+      promptPackPolicy: "allow",
+      textPolicy: next.textPolicy === "lock" ? "preserve" : next.textPolicy,
+      peoplePolicy: "none",
+      useModelImage: false,
+      copyImageCoupled: false,
+      routeReason: appendUniqueInstruction(
+        next.routeReason,
+        "多模态已判定为普通可吃词包场景页，纠正为使用前置词包重建场景。",
+        240,
+      ),
+      generationPrompt: appendUniqueInstruction(
+        next.generationPrompt,
+        "本屏是普通空间/场景详情页：必须使用前置工作流词包重建图片框内旧背景、产品、空间、软装和灯光，同时保留参考图版式骨架、文字区、机位和信息层级。",
+      ),
+    };
+  } else if (shouldProtectPeople && shouldProtectWhiteLayout) {
+    next = {
+      ...next,
+      pageKind: "white_layout",
       generationRoute: "layout_preserve_replace",
       promptPackPolicy: "forbid",
       textPolicy: next.textPolicy === "free" ? "preserve" : next.textPolicy,
@@ -839,6 +1143,7 @@ function applyDetailReplacementScenePlanGuards(
   } else if (shouldProtectPeople && shouldProtectWhiteScene) {
     next = {
       ...next,
+      pageKind: "white_scene",
       generationRoute: "people_relation_locked",
       promptPackPolicy: "soft",
       textPolicy: next.textPolicy === "free" ? "preserve" : next.textPolicy,
@@ -868,6 +1173,7 @@ function applyDetailReplacementScenePlanGuards(
   } else if (shouldProtectPeople) {
     next = {
       ...next,
+      pageKind: "people_scene",
       generationRoute: "people_relation_locked",
       promptPackPolicy: "allow",
       textPolicy: next.textPolicy === "free" ? "preserve" : next.textPolicy,
@@ -896,7 +1202,12 @@ function applyDetailReplacementScenePlanGuards(
   } else if (shouldLockCopy) {
     next = {
       ...next,
-      generationRoute: shouldProtectWhiteLayout
+      pageKind: pageKind === "copy_locked"
+        ? "copy_locked"
+        : shouldProtectWhiteLayout
+          ? "white_layout"
+          : "copy_locked",
+      generationRoute: shouldProtectWhiteLayout && pageKind !== "copy_locked"
         ? "layout_preserve_replace"
         : "copy_locked_regenerate",
       promptPackPolicy: "forbid",
@@ -905,14 +1216,14 @@ function applyDetailReplacementScenePlanGuards(
       useModelImage: false,
       routeReason: appendUniqueInstruction(
         next.routeReason,
-        shouldProtectWhiteLayout
+        shouldProtectWhiteLayout && pageKind !== "copy_locked"
           ? "命中白底/说明图或强文案版式，禁止套用场景词包。"
           : "命中强图文绑定，禁止套用场景词包。",
         220,
       ),
       generationPrompt: appendUniqueInstruction(
         next.generationPrompt,
-        shouldProtectWhiteLayout
+        shouldProtectWhiteLayout && pageKind !== "copy_locked"
           ? "本屏按白底产品说明/参数排版处理：严格保留白底、留白、标题、标签、参数、文字颜色层级和产品位置，只做必要的产品/材质/视觉区替换，不允许生成室内场景、厨房、客厅、人物或软装背景。"
           : "本屏文案与画面强绑定：文字内容、颜色、位置、层级和对应画面语义必须一致，只做必要局部替换，不允许按前置词包改造成另一套场景。",
       ),
@@ -927,6 +1238,7 @@ function applyDetailReplacementScenePlanGuards(
   } else if (shouldProtectWhiteLayout) {
     next = {
       ...next,
+      pageKind: "white_layout",
       generationRoute: "layout_preserve_replace",
       promptPackPolicy: "forbid",
       textPolicy: next.textPolicy === "free" ? "preserve" : next.textPolicy,
@@ -945,6 +1257,7 @@ function applyDetailReplacementScenePlanGuards(
   } else if (shouldProtectWhiteScene) {
     next = {
       ...next,
+      pageKind: "white_scene",
       generationRoute: "prompt_pack_scene",
       promptPackPolicy: "soft",
       textPolicy: next.textPolicy === "free" ? "preserve" : next.textPolicy,
@@ -1064,9 +1377,49 @@ export function parseReplacementScenePlan(
       parsed.generationPrompt || parsed.recommendedScenePrompt || parsed.scenePrompt,
       1200,
     );
+    const rawPlanText = [
+      parsed.pageKind,
+      parsed.detailPageKind,
+      parsed.pageType,
+      parsed.referencePageKind,
+      parsed.routeReason,
+      parsed.strategyReason,
+      parsed.policyReason,
+      parsed.reason,
+      parsed.sceneSummary,
+      parsed.sceneDescription,
+      parsed.preserveSummary,
+      parsed.mustKeep,
+      parsed.styleSummary,
+      parsed.avoidSummary,
+      generationPrompt,
+    ]
+      .filter(Boolean)
+      .join(" ");
+    const pageKind =
+      normalizeDetailPageKind(
+        parsed.pageKind ||
+          parsed.detailPageKind ||
+          parsed.pageType ||
+          parsed.referencePageKind,
+      ) ||
+      inferDetailPageKind({
+        route: generationRoute,
+        promptPackPolicy,
+        textPolicy,
+        peoplePolicy,
+        whiteBackgroundLikely,
+        copyImageCoupled,
+        hasDimensionLayoutHint:
+          DETAIL_DIMENSION_LAYOUT_HINT_PATTERN.test(rawPlanText),
+        hasReferencePosterActionHint:
+          DETAIL_REFERENCE_POSTER_ACTION_HINT_PATTERN.test(rawPlanText),
+        visualProfile: params.visualProfile,
+      });
 
     const productImageSelection = buildDefaultProductImageSelection(params.productImageCount);
     let scenePlan: ReplacementScenePlan = {
+      pageKind,
       generationRoute,
       promptPackPolicy,
       textPolicy,
@@ -1156,9 +1509,23 @@ export function buildHeuristicReplacementScenePlan(params: {
   const isProductOnly = params.replacementStrategy === "product_only";
   const productImageSelection = buildDefaultProductImageSelection(params.productImageCount);
   const fallbackText = String(params.reason || "");
+  const fallbackHasDimensionLayout =
+    DETAIL_DIMENSION_LAYOUT_HINT_PATTERN.test(fallbackText);
+  const fallbackHasReferencePosterAction =
+    DETAIL_REFERENCE_POSTER_ACTION_HINT_PATTERN.test(fallbackText);
   const fallbackHasPeopleAction = DETAIL_PEOPLE_ACTION_HINT_PATTERN.test(fallbackText);
   const fallbackHasHardLayout = DETAIL_HARD_LAYOUT_HINT_PATTERN.test(fallbackText);
   const shouldProtectFallbackWhiteLayout =
+    isDetailReplacement &&
+    !isProductOnly &&
+    fallbackHasDimensionLayout;
+  const shouldProtectFallbackReferencePosterAction =
+    isDetailReplacement &&
+    !isProductOnly &&
+    !shouldProtectFallbackWhiteLayout &&
+    fallbackHasPeopleAction &&
+    fallbackHasReferencePosterAction;
+  const shouldProtectFallbackCopyLayout =
     isDetailReplacement &&
     !isProductOnly &&
     !fallbackHasPeopleAction &&
@@ -1169,16 +1536,19 @@ export function buildHeuristicReplacementScenePlan(params: {
     isDetailReplacement &&
     !isProductOnly &&
     !shouldProtectFallbackWhiteLayout &&
+    !shouldProtectFallbackReferencePosterAction &&
     (fallbackHasPeopleAction ||
       Boolean(params.visualProfile?.likelyWhiteScene) ||
       Boolean(params.visualProfile?.likelyWhiteLayout));
   const shouldProtectFallbackLayout =
-    shouldProtectFallbackWhiteLayout;
+    shouldProtectFallbackWhiteLayout || shouldProtectFallbackCopyLayout;
   const generationRoute = params.shouldReplace
     ? isProductOnly
       ? "layout_preserve_replace"
       : isDetailReplacement
-        ? fallbackHasPeopleAction
+        ? shouldProtectFallbackWhiteLayout
+          ? "layout_preserve_replace"
+          : fallbackHasPeopleAction
           ? "people_relation_locked"
           : shouldProtectFallbackLayout
           ? "layout_preserve_replace"
@@ -1187,7 +1557,9 @@ export function buildHeuristicReplacementScenePlan(params: {
     : "direct_passthrough";
   const promptPackPolicy: DetailReplacementPromptPackPolicy =
     params.shouldReplace && isDetailReplacement && !isProductOnly
-      ? fallbackHasPeopleAction
+      ? shouldProtectFallbackWhiteLayout || shouldProtectFallbackReferencePosterAction
+        ? "forbid"
+        : fallbackHasPeopleAction
         ? shouldRebuildFallbackWhiteScene
           ? "soft"
           : "allow"
@@ -1195,12 +1567,35 @@ export function buildHeuristicReplacementScenePlan(params: {
           ? "soft"
           : inferPromptPackPolicy(generationRoute)
       : inferPromptPackPolicy(generationRoute);
+  const fallbackPageKind = inferDetailPageKind({
+    route: generationRoute,
+    promptPackPolicy,
+    textPolicy:
+      shouldProtectFallbackWhiteLayout || shouldProtectFallbackReferencePosterAction
+        ? "lock"
+        : fallbackHasPeopleAction || shouldRebuildFallbackWhiteScene
+          ? "preserve"
+          : "free",
+    peoplePolicy: fallbackHasPeopleAction ? "preserve_relation" : "none",
+    whiteBackgroundLikely: Boolean(
+      params.visualProfile?.likelyWhiteLayout || params.visualProfile?.likelyWhiteScene,
+    ),
+    copyImageCoupled: false,
+    hasDimensionLayoutHint: fallbackHasDimensionLayout,
+    hasReferencePosterActionHint: fallbackHasReferencePosterAction,
+    visualProfile: params.visualProfile,
+  });
   const scenePlan: ReplacementScenePlan = {
+    pageKind: fallbackPageKind,
     generationRoute,
     promptPackPolicy,
     textPolicy:
       generationRoute === "direct_passthrough" || shouldProtectFallbackLayout
-        ? "preserve"
+        ? shouldProtectFallbackWhiteLayout
+          ? "lock"
+          : "preserve"
+        : shouldProtectFallbackReferencePosterAction
+          ? "lock"
         : fallbackHasPeopleAction || shouldRebuildFallbackWhiteScene
           ? "preserve"
         : "free",
@@ -1213,7 +1608,11 @@ export function buildHeuristicReplacementScenePlan(params: {
       ? isProductOnly
         ? "兜底按仅替换产品执行，不使用词包。"
         : isDetailReplacement
-          ? fallbackHasPeopleAction
+          ? shouldProtectFallbackWhiteLayout
+            ? "兜底命中产品尺寸说明页，按白底抠图和尺寸标注执行，不使用词包。"
+            : shouldProtectFallbackReferencePosterAction
+            ? "兜底命中参考动作海报，保留人物动作和产品形状，不使用词包。"
+            : fallbackHasPeopleAction
             ? "兜底命中人物/动作/使用场景，按人物关系锁定并允许词包重建背景和产品场景。"
             : shouldProtectFallbackLayout
             ? "兜底命中白底说明/强文案版式，按详情版式保护执行，不使用词包。"
@@ -1233,6 +1632,10 @@ export function buildHeuristicReplacementScenePlan(params: {
     sceneSummary: params.shouldReplace
       ? isProductOnly
         ? "严格保留参考图的场景、文案和版式，只把产品展示区中的旧产品替换成输入产品。"
+        : shouldProtectFallbackWhiteLayout
+          ? "产品主体抠出在白底或米白底中展示，保留产品尺寸标题、单位、尺寸线、尺寸数字和原版式关系。"
+        : shouldProtectFallbackReferencePosterAction
+          ? "按参考图动作海报做类似图，保留人物数量、动作、产品形状、机位、标题标签和图文关系，不套用前置词包。"
         : fallbackHasPeopleAction
           ? "保留参考图人物数量、动作、互动关系、文字层级和版式骨架，同时按工作流目标重建背景、产品、软装和灯光。"
           : shouldProtectFallbackLayout
@@ -1247,9 +1650,17 @@ export function buildHeuristicReplacementScenePlan(params: {
       : "产品应落在参考图当前主体所在区域，并围绕该区域同步重建新的场景内容。",
     preserveSummary: isProductOnly
       ? "除产品主体外，文字排版、标题区、分割线、留白、背景、灯光和装饰都必须保留。"
+      : shouldProtectFallbackWhiteLayout
+        ? "标题、单位、尺寸线、数字标注、白底留白、产品外轮廓、比例和透视必须保留。"
+      : shouldProtectFallbackReferencePosterAction
+        ? "标题标签、人物数量、动作姿态、产品外轮廓、长宽比例、腿部结构、机位和版式必须保留。"
       : "文字排版、标题区、分割线、留白和信息层级必须保留。",
     styleSummary: isProductOnly
       ? "延续参考图原有风格、背景和氛围，不引入新的场景改造要求。"
+      : shouldProtectFallbackWhiteLayout
+        ? "白底产品尺寸说明图，只允许产品抠图和尺寸标注，不引入室内场景。"
+      : shouldProtectFallbackReferencePosterAction
+        ? "参考图动作海报语义优先，做同动作同版式类似图，不引入前置空间词包。"
       : fallbackHasPeopleAction
         ? "人物动作和关系保真，背景、产品场景、软装和灯光按前置词包明显重建。"
         : shouldProtectFallbackLayout
@@ -1259,6 +1670,10 @@ export function buildHeuristicReplacementScenePlan(params: {
         : "除版式骨架外，墙面、地面、背景家具、软装、灯光、摆件和空间氛围都要按工作流风格重建。",
     avoidSummary: isProductOnly
       ? "不要改动背景、文案、按钮、图标、排版和装饰，不要重建整个场景，不要把多个产品角度同时塞进一张图。"
+      : shouldProtectFallbackWhiteLayout
+        ? "不要生成厨房、餐椅、柜体、灯具、花瓶、人物或软装背景，不要改变产品形状，不要丢尺寸线和单位。"
+      : shouldProtectFallbackReferencePosterAction
+        ? "不要把多人改成单人或无人，不要把坐姿/承重动作改成走动人物，不要套用厨房/餐厨词包，不要改产品形状。"
       : fallbackHasPeopleAction
         ? "不要生成白底单品图，不要删掉人物，不要把多人压成单人，不要只小幅复刻原图，也不要破坏文字版式。"
         : shouldProtectFallbackLayout
@@ -1269,6 +1684,10 @@ export function buildHeuristicReplacementScenePlan(params: {
     generationPrompt: params.shouldReplace
       ? isProductOnly
         ? `仅替换参考图中的产品主体，严格保留其余背景、文案、排版与光影关系。${params.reason}`
+        : isDetailReplacement && shouldProtectFallbackWhiteLayout
+          ? `当前参考图按产品尺寸说明页处理：不使用前置词包；必须把产品主体抠出放在白底/米白底上，保留标题“产品尺寸”、单位 cm、尺寸箭头/尺寸线/数字标注和原版式位置；禁止生成室内场景、人物、椅子、柜体、灯具、花瓶或软装背景；产品形状、桌面比例、腿部结构、圆角和透视必须跟参考图一致。${params.reason}`
+        : isDetailReplacement && shouldProtectFallbackReferencePosterAction
+          ? `当前参考图按动作海报处理：不使用前置词包；必须根据参考图做同版式类似图，保留标题标签、人物数量、多人围坐/试坐/单侧承重/受力测试等动作、产品外轮廓、长宽比例、桌面圆角、腿部结构、透视角度和机位；禁止生成无关餐厨空间、走动人物、无人空场景或另一种产品形状。${params.reason}`
         : isDetailReplacement && fallbackHasPeopleAction
           ? `当前参考图按人物/动作详情页处理：必须保留参考图中的人物数量、动作、朝向、互动关系和出镜比例，同时使用前置工作流词包明显重建图片框内旧背景、产品、空间、软装和灯光；禁止生成白底单品图或无人物空场景，保留文字区、版式骨架、机位和信息层级。${params.reason}`
         : isDetailReplacement && shouldProtectFallbackLayout
@@ -1288,7 +1707,8 @@ export function buildHeuristicReplacementScenePlan(params: {
     hasModelImage: params.hasModelImage,
     hasImportantText: shouldProtectFallbackLayout,
     containsPeople: false,
-    containsMultiplePeople: fallbackHasPeopleAction,
+    containsMultiplePeople:
+      fallbackHasPeopleAction || shouldProtectFallbackReferencePosterAction,
     visualProfile: params.visualProfile,
     replacementStrategy: params.replacementStrategy,
   });
@@ -1768,7 +2188,7 @@ export async function analyzeReplacementExecutionPlan(params: {
           ? `像素初筛：nearWhite=${referenceVisualProfile.nearWhitePixelRatio.toFixed(2)}, lightLowSaturation=${referenceVisualProfile.lightLowSaturationPixelRatio.toFixed(2)}, topLight=${referenceVisualProfile.topLightLowSaturationPixelRatio.toFixed(2)}, borderLight=${referenceVisualProfile.borderLightLowSaturationPixelRatio.toFixed(2)}, dark=${referenceVisualProfile.darkPixelRatio.toFixed(2)}, likelyWhiteLayout=${referenceVisualProfile.likelyWhiteLayout ? "true" : "false"}, likelyWhiteScene=${referenceVisualProfile.likelyWhiteScene ? "true" : "false"}。${referenceVisualProfile.reason}`
           : "",
         referenceVisualProfile?.likelyWhiteLayout
-          ? "像素初筛已经命中白底/浅色说明页：只要画面存在标题、标签、参数、尺寸、卖点、图标、白底图片区、圆角图片区或明显留白排版，generationRoute 必须是 layout_preserve_replace 或 copy_locked_regenerate，promptPackPolicy 必须 forbid；即使包含人物/动作，也只能保留人物关系与白底版式，不允许套用厨房、客厅、灯光、软装等场景词包。"
+          ? "像素初筛已经命中白底/浅色说明页候选：请继续读取画面文字和图像语义。若存在标题、标签、参数、尺寸、卖点、图标、白底图片区、圆角图片区、人物动作海报或明显留白排版，generationRoute 必须是 layout_preserve_replace、copy_locked_regenerate 或 people_relation_locked，promptPackPolicy 必须 forbid；人物动作只能按参考图保留，不允许套用厨房、客厅、灯光、软装等场景词包。"
           : "",
         !referenceVisualProfile?.likelyWhiteLayout && referenceVisualProfile?.likelyWhiteScene
           ? "像素初筛已经命中白/浅色低饱和真实场景：这不是白底说明页。若画面存在真实空间、人物或产品照片，promptPackPolicy 应为 soft 或 allow，必须使用前置工作流词包重建图片框内产品、空间、软装和灯光，使差异清晰可见；但最终仍保持白/浅色低饱和基调，不要改造成深色厨房、黑墙、复杂吊灯或强软装。"
@@ -1792,6 +2212,12 @@ export async function analyzeReplacementExecutionPlan(params: {
           : isDetailReplacement
           ? "这张参考图可能是场景图、白底说明图、强文案图、人物关系图或纯版式图。你必须先判断它适合哪一种执行路由，再决定是否允许前置工作流词包参与。文字、标题、卖点标签、UI图标、按钮、分割线、品牌标识、留白和排版必须保留。"
           : "这张参考图不是要求原样保留的场景照片。原图里的沙发、床、柜体、墙面、地面、窗帘、灯具、摆件、桌面道具、背景家具和环境光氛围，都可以在后续生图阶段按前置工作流风格重建。",
+        isDetailReplacement
+          ? "重要分流例子：如果标题/标签或画面写着“多人围坐、聚餐、横向受力测试、单侧承重、重心依旧平稳、桌体依然稳固”等动作海报语义，这不是通用 prompt pack 场景图；必须 people_relation_locked + promptPackPolicy=forbid，根据参考图做同版式同动作类似图。"
+          : "",
+        isDetailReplacement
+          ? "重要分流例子：如果标题或标注写着“产品尺寸、尺寸、单位 cm、160/180/210、90、75、尺寸线、尺寸箭头”等产品尺寸说明语义，必须 layout_preserve_replace + promptPackPolicy=forbid；后续应生成白底/米白底产品抠图和尺寸标注，不允许生成室内场景、椅子、人物、柜体、灯具或软装背景。"
+          : "",
         "请完成以下任务：",
         isProductOnlyDetailReplacement
           ? "1. shouldReplace 固定为 true：详情替换只允许规划处理范围，不允许判定直接沿用。若没有清晰产品主体，也要继续寻找产品展示区、材质/板材/原材料视觉区或可局部处理区域。"
@@ -1799,20 +2225,23 @@ export async function analyzeReplacementExecutionPlan(params: {
           ? "1. shouldReplace 固定为 true：除非用户已经在前置流程人工勾选不处理（此处不会进入分析），你不能返回 false。若没有产品，检查人物/模特；没有人物，检查板材/材质/原材料、背景图或其它视觉区。"
           : "1. 判断 shouldReplace：当前参考图里是否存在清晰、主要、适合被替换的家具商品主体。",
         "2. 判断 useModelImage，并说明原因。",
+        isDetailReplacement
+          ? "2a. 先输出 pageKind，这是后续策略的核心分类：prompt_pack_scene=普通可吃词包空间/场景页；white_scene=白/浅色真实场景且可软吃词包；white_layout=白底说明/纯排版/卖点参数页；copy_locked=文案和图强绑定页；people_scene=普通人物/模特真实场景，可保留人物并软吃词包；action_poster=文字或画面明确要求多人围坐、自拍、聚餐、试坐、承重、受力测试等动作的海报页，参考图动作优先；dimension_spec=产品尺寸/单位/尺寸线/标注页；material_detail=材质/板材/原材料说明页。"
+          : "",
         isDetailReplacement
           ? "3. 判断 generationRoute：prompt_pack_scene=通用场景图且可吃词包；layout_preserve_replace=锁定版式/白底/产品说明/材质说明，只做有限替换；copy_locked_regenerate=文案与画面强绑定，必须锁文案；people_relation_locked=多人/模特/互动关系图，必须锁人物关系。详情替换不允许 direct_passthrough。"
           : "3. 提炼 sceneSummary、cameraSummary、placementSummary、preserveSummary、styleSummary、avoidSummary。",
         isDetailReplacement
-          ? "4. 判断 promptPackPolicy：纯白底参数/说明/卖点页、强图文绑定且没有真实展示动作的详情页必须 forbid；通用空间场景必须 allow；人物/自拍/聚会/承重测试/使用产品等动作展示页可以 people_relation_locked + allow/soft，含义是保留人物动作与文字层级，但允许前置词包重建背景、灯光、软装和产品场景。"
+          ? "4. 判断 promptPackPolicy：纯白底参数/说明/卖点页、产品尺寸页、强图文绑定页、以及标题/标签已经明确动作的详情海报页必须 forbid；通用空间场景必须 allow；只有没有强文案/海报动作绑定的真实人物生活场景，才可以 people_relation_locked + allow/soft。"
           : "",
         isDetailReplacement
-          ? "4a. 白底/白场景分流规则：白底参数、规格、卖点、强文案、图标说明或纯版式页必须 forbid；白/浅色真实场景页不能 forbid，应使用 soft/allow 词包重造图片框内产品、空间、软装和灯光，但保持白/浅色低饱和基调，禁止变成深色厨房、黑墙、复杂吊灯或强软装。"
+          ? "4a. 白底/白场景分流规则：白底参数、规格、卖点、产品尺寸、强文案、图标说明、纯版式页或动作测试海报必须 forbid；白/浅色真实场景页只有在没有这些强绑定文字时才使用 soft/allow 词包重造图片框内产品、空间、软装和灯光。"
           : "",
         isDetailReplacement
           ? "5. 判断 textPolicy：画面中存在营销标题、卖点、编号、参数、标签且与图匹配时必须 lock 或 preserve，避免后续生图改字、混色或重排。"
           : "",
         isDetailReplacement
-          ? "6. 判断 peoplePolicy：有人物/多人/自拍/聚会/模特互动/拿手机/用餐动作时必须 preserve_relation；如果文字明确写了“来张自拍、合照、聚会、用餐、互动”等动作，generationPrompt 必须把这个动作写成硬约束；如果只提供 1 张模特图但参考图多人，仍要保留参考图人数和关系，额外人物按参考图生成相近人群。"
+          ? "6. 判断 peoplePolicy：有人物/多人/自拍/聚会/围坐/聚餐/模特互动/拿手机/用餐/试坐/承重动作时必须 preserve_relation；如果文字明确写了“多人围坐、聚餐、合照、用餐、单侧承重、横向受力测试、拿手机”等动作，generationPrompt 必须把这个动作写成硬约束；如果只提供 1 张模特图但参考图多人，仍要保留参考图人数和关系，额外人物按参考图生成相近人群。"
           : "",
         isDetailReplacement
           ? "7. 提炼 sceneSummary、cameraSummary、placementSummary、preserveSummary、styleSummary、avoidSummary。"
@@ -1820,7 +2249,7 @@ export async function analyzeReplacementExecutionPlan(params: {
         isProductOnlyDetailReplacement
           ? "4. 输出 generationPrompt：这是一段给后续生图模型的本屏生成指令，要求只替换产品主体，保留其余背景、文案、排版、装饰和光影完全不变。"
           : isDetailReplacement
-          ? "8. 输出 generationPrompt：这是一段给后续生图模型的本屏生成指令。若 promptPackPolicy=forbid，必须明确“不使用前置词包，参考图语义优先”；若 promptPackPolicy=allow/soft 且 peoplePolicy=preserve_relation，必须明确“保留人物数量/动作/关系与文字层级，同时使用前置词包重建背景/产品场景”；若 textPolicy=lock，必须明确文字内容、颜色、层级和位置不可改。"
+          ? "8. 输出 generationPrompt：这是一段给后续生图模型的本屏生成指令。若 promptPackPolicy=forbid，必须明确“不使用前置词包，参考图语义优先”；若是动作海报，必须写清人物数量、围坐/试坐/承重等动作、产品形状和版式必须照参考图；若是产品尺寸页，必须写清白底抠图、尺寸线、单位和数字标注，不允许室内场景；若 promptPackPolicy=allow/soft 且 peoplePolicy=preserve_relation，才明确“保留人物数量/动作/关系与文字层级，同时使用前置词包重建背景/产品场景”。"
           : "4. 输出 generationPrompt：这是一段给后续生图模型的本屏生成指令，描述这一屏需要的场景、机位、主体位置、周边环境重建方向以及必须保留的内容。",
         isProductOnlyDetailReplacement
           ? "5. sceneSummary、styleSummary 和 generationPrompt 必须强调‘只替换产品，不动其他内容’，不要引导重建场景。"
@@ -1842,7 +2271,7 @@ export async function analyzeReplacementExecutionPlan(params: {
           : "",
         "只返回严格 JSON，不要任何额外解释。",
         `JSON 格式：
-{"shouldReplace":true,"containsFurnitureProduct":true,"reason":"不超过30字","generationRoute":"${isDetailReplacement ? "prompt_pack_scene|layout_preserve_replace|copy_locked_regenerate|people_relation_locked" : "prompt_pack_scene|layout_preserve_replace|copy_locked_regenerate|people_relation_locked|direct_passthrough"}","promptPackPolicy":"allow|soft|forbid","textPolicy":"free|preserve|lock","peoplePolicy":"none|preserve_relation|require_user_model","whiteBackgroundLikely":false,"copyImageCoupled":false,"containsPeople":false,"containsMultiplePeople":false,"routeReason":"不超过50字","useModelImage":false,"modelImageReason":"不超过40字","sceneSummary":"不超过80字","cameraSummary":"不超过60字","placementSummary":"不超过60字","preserveSummary":"不超过80字","styleSummary":"不超过80字","avoidSummary":"不超过80字","generationPrompt":"不超过300字"}`,
+{"shouldReplace":true,"containsFurnitureProduct":true,"reason":"不超过30字","pageKind":"prompt_pack_scene|white_scene|white_layout|copy_locked|people_scene|action_poster|dimension_spec|material_detail|unknown","generationRoute":"${isDetailReplacement ? "prompt_pack_scene|layout_preserve_replace|copy_locked_regenerate|people_relation_locked" : "prompt_pack_scene|layout_preserve_replace|copy_locked_regenerate|people_relation_locked|direct_passthrough"}","promptPackPolicy":"allow|soft|forbid","textPolicy":"free|preserve|lock","peoplePolicy":"none|preserve_relation|require_user_model","whiteBackgroundLikely":false,"copyImageCoupled":false,"containsPeople":false,"containsMultiplePeople":false,"routeReason":"不超过50字","useModelImage":false,"modelImageReason":"不超过40字","sceneSummary":"不超过80字","cameraSummary":"不超过60字","placementSummary":"不超过60字","preserveSummary":"不超过80字","styleSummary":"不超过80字","avoidSummary":"不超过80字","generationPrompt":"不超过300字"}`,
       ]
         .filter(Boolean)
         .join("\n");
@@ -1873,14 +2302,14 @@ export async function analyzeReplacementExecutionPlan(params: {
 
       const parsedDecision = parseReplacementReferenceDecision(text);
       const parsedScenePlan = parseReplacementScenePlan(text, {
-          productImageCount: params.productImageUrls.length,
-          hasModelImage: isProductOnlyDetailReplacement
-            ? false
-            : Boolean(params.modelImageUrl),
-          modeType: params.modeType,
-          replacementStrategy: params.replacementStrategy,
-          visualProfile: referenceVisualProfile,
-        });
+        productImageCount: params.productImageUrls.length,
+        hasModelImage: isProductOnlyDetailReplacement
+          ? false
+          : Boolean(params.modelImageUrl),
+        modeType: params.modeType,
+        replacementStrategy: params.replacementStrategy,
+        visualProfile: referenceVisualProfile,
+      });
 
       if (parsedDecision && parsedScenePlan) {
         const normalizedPlan = ensureDetailReferenceGenerates(
@@ -2001,6 +2430,17 @@ export function buildAgentReplacementPrompt(params: {
       replacementStrategy: params.replacementStrategy,
       scenePlan: params.scenePlan,
     });
+  const detailScenePlanText = params.scenePlan
+    ? planTextForPolicyGuards(params.scenePlan)
+    : "";
+  const isDimensionDetailPlan =
+    params.modeType === "detail_replacement" &&
+    (params.scenePlan?.pageKind === "dimension_spec" ||
+      DETAIL_DIMENSION_LAYOUT_HINT_PATTERN.test(detailScenePlanText));
+  const isReferencePosterActionPlan =
+    params.modeType === "detail_replacement" &&
+    (params.scenePlan?.pageKind === "action_poster" ||
+      DETAIL_REFERENCE_POSTER_ACTION_HINT_PATTERN.test(detailScenePlanText));
 
   if (params.productImageCount > 0) {
     const productRangeLabel =
@@ -2046,6 +2486,7 @@ export function buildAgentReplacementPrompt(params: {
   const scenePlanLines = params.scenePlan
     ? [
         "【本屏场景预分析】",
+        `页面类型：${params.scenePlan.pageKind}`,
         `自动路由：${params.scenePlan.generationRoute}`,
         `词包策略：${params.scenePlan.promptPackPolicy}`,
         `文案策略：${params.scenePlan.textPolicy}`,
@@ -2147,6 +2588,12 @@ export function buildAgentReplacementPrompt(params: {
           ...marketplaceBrandRemovalLines,
           "你现在做的是“详情参考图背景/场景图替换”，不是重新设计整张详情图。",
           "【版式锁层规则】把最后一张参考图当成 PSD 模板：文字、标题、编号、卖点标签、按钮、图标、白底/浅色底、留白、分割线、圆角图片框、图片框裁切边界都属于锁定版式层，不允许移动、缩放、重排或重新设计。",
+          isReferencePosterActionPlan
+            ? "【参考动作海报硬约束】本屏不使用前置词包；必须按照最后一张参考图做同版式类似图。若标题/标签写多人围坐、聚餐、横向受力测试、单侧承重、重心平稳等，人物数量、相对位置、围坐/试坐/承重动作、产品受力关系、产品外轮廓、桌面长宽比例、圆角、腿部结构和透视角度都必须跟参考图一致。"
+            : "",
+          isDimensionDetailPlan
+            ? "【产品尺寸图硬约束】本屏不使用前置词包；必须是白底/米白底产品抠图尺寸说明页。保留标题“产品尺寸”、单位 cm、尺寸线/箭头/数字标注和原版式位置；产品主体外轮廓、长宽比例、圆角、腿部结构和透视必须跟参考图一致；禁止生成室内场景、椅子、柜体、灯具、花瓶、人物或软装背景。"
+            : "",
           "如果参考图是“上方文字/标签白底区 + 下方图片/场景圆角框”的结构，必须原样保留标题区高度、文字换行、文字字号、文字左上角位置、标签位置、图片框起始高度、圆角、左右边距和上下留白；禁止把新场景铺到标题白底区背后。",
           "如果参考图里存在嵌入式图片框、产品照片框、人物展示框或圆角大图区域，只能在该原始框内重建背景/产品/人物画面；新画面必须被裁切在原图片框边界内，不能扩大图片框，不能覆盖文字区、标签区或外层白底。",
           "版式层优先级高于词包：前置词包只负责图片框内部的空间风格、灯光、软装、背景和产品场景，不授权修改页面排版、文字位置、标签样式、留白比例或视觉层级。",
@@ -2175,7 +2622,7 @@ export function buildAgentReplacementPrompt(params: {
           params.scenePlan?.peoplePolicy === "require_user_model"
             ? "本屏包含人物但没有提供用户模特图：禁止把参考图中的人物身份当作用户模特迁移；只能保留人物数量、关系、动作和构图语义，不要换成不相关强人物主体。"
             : params.scenePlan?.peoplePolicy === "preserve_relation"
-              ? "本屏包含人物关系：必须保留人物数量、相对位置、互动关系、动作方向和出镜比例；如果参考图文字写了自拍/合照/聚会/用餐/拿手机等动作，必须让人物执行该动作，不要把多人图改成单人图、无人图或无关模特图。"
+              ? "本屏包含人物关系：必须保留人物数量、相对位置、互动关系、动作方向和出镜比例；如果参考图文字写了自拍/合照/多人围坐/聚餐/用餐/单侧承重/横向受力测试/拿手机等动作，必须让人物执行该动作，不要把多人图改成单人图、无人图或无关模特图。"
               : "如果参考图没有明确人物展示需求，不要凭空新增人物主体。",
           params.scenePlan?.whiteBackgroundLikely && shouldApplyPromptPack
             ? "本屏是白/浅色真实场景且词包已启用：必须让图片框内旧背景、产品、软装、灯光和空间发生清晰可见的重建；不能只微调原图或原样复刻，但也不能破坏外层白底/浅色版式和文字区。"
diff --git a/app/(chat)/api/chat/route.ts b/app/(chat)/api/chat/route.ts
index 278a9eab4..dac7594b0 100644
--- a/app/(chat)/api/chat/route.ts
+++ b/app/(chat)/api/chat/route.ts
@@ -3398,6 +3398,7 @@ export async function POST(request: Request) {
                 reason: replacementExecutionPlan.reason,
                 detectionSource: replacementExecutionPlan.detectionSource,
                 scenePlanSource: replacementExecutionPlan.scenePlan.analysisSource,
+                pageKind: replacementExecutionPlan.scenePlan.pageKind,
                 generationRoute: replacementExecutionPlan.scenePlan.generationRoute,
                 promptPackPolicy: replacementExecutionPlan.scenePlan.promptPackPolicy,
                 packPolicy: replacementExecutionPlan.scenePlan.promptPackPolicy,
@@ -3453,6 +3454,7 @@ export async function POST(request: Request) {
                 referenceIndex: referenceIndex + 1,
                 totalReferences: replacementReferences.length,
                 referenceLabel: reference.label,
+                pageKind: replacementExecutionPlan.scenePlan.pageKind,
                 generationRoute: replacementExecutionPlan.scenePlan.generationRoute,
                 packPolicy: replacementExecutionPlan.scenePlan.promptPackPolicy,
                 selectedProductImages: selectedProductContextImageUrls.length,
@@ -4160,6 +4162,7 @@ export async function POST(request: Request) {
                     replacementExecutionPlan.scenePlan.productSelectionReason,
                   useModelImage: replacementExecutionPlan.scenePlan.useModelImage,
                   modelImageReason: replacementExecutionPlan.scenePlan.modelImageReason,
+                  pageKind: replacementExecutionPlan.scenePlan.pageKind,
                   generationRoute: replacementExecutionPlan.scenePlan.generationRoute,
                   promptPackPolicy: replacementExecutionPlan.scenePlan.promptPackPolicy,
                   routeReason: replacementExecutionPlan.scenePlan.routeReason,
@@ -4273,6 +4276,9 @@ export async function POST(request: Request) {
                   referenceLabel: reference.label,
                   pairedProductIndex:
                     typeof pairedProductIndex === "number" ? pairedProductIndex + 1 : null,
+                  pageKind: replacementExecutionPlan.scenePlan.pageKind,
+                  generationRoute: replacementExecutionPlan.scenePlan.generationRoute,
+                  promptPackPolicy: replacementExecutionPlan.scenePlan.promptPackPolicy,
                   sourceImageCount: sourceImageUrls.length,
                   generationAspectRatio,
                   imageOrder: {