feat: add dev diary and ending thumbnails, update chapter endings display

ROADMAP.md

@@ -123,6 +123,27 @@ QTE 成功 → effects: enemy_hp -= 25
 - [x] `public/scenes/demo.json` — 新增 `combat_router` 条件路由示例
 - [x] 验证：TypeScript + Vite build 通过
 
+### P26 关键节点过滤 — StoryGallery 只展示剧情分叉点 ✅ 已完成 2026-06-12
+
+目标：StoryGallery 不再展示所有场景，只展示剧情关键节点（章节起始、选择分支点、结局点）。
+QTE 场景和过渡/路由场景被过滤，子节点上浮一级。
+
+**三层判断：**
+
+| 优先级 | 来源 | 说明 |
+|:--:|------|------|
+| 1 | `SceneNode.keyMoment` | 手动覆盖。`true`=强制展示，`false`=强制隐藏 |
+| 2 | `endings[].sceneId` | 结局节点 |
+| 3 | 自动判断 | 章节起点 / 有 `choices`（分支点）→ 关键节点。QTE 不算 |
+
+**扁平化：** 非关键节点不渲染，子节点上浮到父节点层级，路径语义不变。
+
+**实现清单：**
+
+- [x] `engine/types.ts` — `SceneNode.keyMoment?: boolean`
+- [x] `src/components/StoryGallery.vue` — `isKeyMoment()` 三层逻辑 + `collectKeyTargets()` 扁平化非关键节点
+- [x] 验证：TypeScript + Vite build 通过
+
 ## 已完成
 
 P0~P23 全部实现（除 P18）。详见 [CHANGELOG.md](CHANGELOG.md)。

engine/types.ts

@@ -22,6 +22,7 @@ export interface SceneNode {
   videoMuted?: boolean
   skippable?: boolean
   streamingUrl?: Record<string, string>
+  keyMoment?: boolean
 }
 
 export interface Choice {

src/components/StoryGallery.vue

@@ -117,6 +117,43 @@ function endingStatus(endingId: string) {
   return props.visitedIds.has(props.endings.find(e => e.id === endingId)?.sceneId ?? '')
 }
 
+function isKeyMoment(sceneId: string): boolean {
+  const scene = props.scenes[sceneId]
+  if (!scene) return false
+  if (scene.keyMoment !== undefined) return scene.keyMoment
+  if (props.chapters.some(c => c.startScene === sceneId)) return true
+  if (scene.choices && scene.choices.length > 0) return true
+  if (props.endings.some(e => e.sceneId === sceneId)) return true
+  return false
+}
+
+function collectKeyTargets(sceneId: string, depth: number, pathSet: Set<string>): string[] {
+  if (depth > 10 || pathSet.has(sceneId)) return []
+  pathSet.add(sceneId)
+  const scene = props.scenes[sceneId]
+  if (!scene) return []
+  if (isKeyMoment(sceneId)) return [sceneId]
+  const results: string[] = []
+  function pushTarget(target: string | undefined) {
+    if (!target) return
+    results.push(...collectKeyTargets(target, depth + 1, pathSet))
+  }
+  if (scene.choices) for (const c of scene.choices) pushTarget(c.targetScene)
+  if (scene.nextScene) {
+    if (Array.isArray(scene.nextScene)) {
+      for (const r of scene.nextScene) pushTarget(r.targetScene)
+    } else {
+      pushTarget(scene.nextScene)
+    }
+  }
+  if (scene.qte) {
+    pushTarget(scene.qte.successScene)
+    pushTarget(scene.qte.failScene)
+  }
+  if (scene.hotspots) for (const h of scene.hotspots) pushTarget(h.targetScene)
+  return results
+}
+
 function resolveInitialChapter(): string {
   const saved = localStorage.getItem('story_chapter')
   if (saved && props.chapters.some(c => c.id === saved)) return saved
@@ -146,21 +183,24 @@ function buildPlayerTree(sceneId: string, chapterId: string, depth: number, path
   if (scene) {
     function pushChild(target: string | undefined) {
       if (!target) return
-      if (isOtherChapterStart(target, chapterId)) {
-        const gatewayCh = props.chapters.find(c => c.startScene === target)
-        children.push({
-          sceneId: '',
-          label: gatewayCh ? (t(gatewayCh.labelKey || gatewayCh.label)) : target,
-          visited: false,
-          locked: !props.unlockedChapterIds.has(gatewayCh?.id ?? ''),
-          children: [],
-          isGateway: true,
-          gatewayChapterId: gatewayCh?.id,
-        })
-        return
+      const keyIds = collectKeyTargets(target, 0, new Set())
+      for (const keyId of keyIds) {
+        if (isOtherChapterStart(keyId, chapterId)) {
+          const gatewayCh = props.chapters.find(c => c.startScene === keyId)
+          children.push({
+            sceneId: '',
+            label: gatewayCh ? (t(gatewayCh.labelKey || gatewayCh.label)) : keyId,
+            visited: false,
+            locked: !props.unlockedChapterIds.has(gatewayCh?.id ?? ''),
+            children: [],
+            isGateway: true,
+            gatewayChapterId: gatewayCh?.id,
+          })
+        } else {
+          const child = buildPlayerTree(keyId, chapterId, depth + 1, pathSet)
+          if (child) children.push(child)
+        }
       }
-      const child = buildPlayerTree(target, chapterId, depth + 1, pathSet)
-      if (child) children.push(child)
     }
     if (scene.choices) {
       for (const c of scene.choices) pushChild(c.targetScene)