重构: 清理技术债 + 数据健壮性增强(P0+P1)

- 删除 inline.ts(方案A遗留死代码,已被 richtext.ts 替代)
- 删除 ElementStyle.rich 字段(segments 方案后无用)
- 删除 PropsPanel 未使用的 CHART_TYPE_MAP
- 删除 editor.css 旧 class 兼容样式(.el-card-title 等)
- 生成整套/重置时自动备份当前 deck 到 .bak(防误覆盖)
- 新增 recoverBackup() 方法(可恢复上一次被覆盖的 deck)
- 旧版本数据不再直接丢弃,改为 migrateDeck() 补字段升级
- chart 元素自动补 chartType:'bar' 默认值

src/core/store.ts

@@ -189,17 +189,41 @@ function touchHistory(key: string) {
   touchTimer = setTimeout(() => { touchKey = null }, 900)
 }
 
+/* ---------- 数据版本迁移（旧版数据补字段升级，不丢弃） ---------- */
+function migrateDeck(d: any): Deck {
+  // v2→v3: 给元素补默认 chartType / 新元素类型无需处理
+  if (!d.v || d.v < 3) {
+    // 确保每个元素有 style 对象
+    (d.slides || []).forEach((s: any) => {
+      (s.elements || []).forEach((e: any) => {
+        if (!e.style) e.style = {};
+        if (e.type === 'chart' && !e.style.chartType) e.style.chartType = 'bar';
+      });
+    });
+  }
+  d.v = DECK_VERSION;
+  return d as Deck;
+}
+
 /* ---------- 初始化 ---------- */
 function init() {
   let loaded: Deck | null = null
   try { loaded = JSON.parse(localStorage.getItem(LS_KEY) || 'null') } catch (e) { /* ignore */ }
   const curV = SAMPLE_DECK.v
-  const valid = loaded && loaded.slides && loaded.slides.length && loaded.v === curV
-  if (!valid && loaded && loaded.slides) {
-    try { localStorage.setItem(LS_KEY + '.bak', JSON.stringify(loaded)) } catch (e) {}  // 旧版备份
+  let deck: Deck
+  if (loaded && loaded.slides && loaded.slides.length) {
+    if (loaded.v !== curV) {
+      // 版本不匹配 → 尝试迁移
+      try { localStorage.setItem(LS_KEY + '.bak', JSON.stringify(loaded)) } catch (e) {}
+      deck = migrateDeck(loaded)
+    } else {
+      deck = loaded
+    }
+  } else {
+    deck = clone(SAMPLE_DECK)
   }
   Object.assign(state, {
-    deck: valid ? loaded! : clone(SAMPLE_DECK),
+    deck,
     currentIndex: 0,
     selectedId: null,
     activeLibId: null
@@ -377,6 +401,10 @@ function redo(): boolean {
 /* ---------- 整体替换（AI 生成 / 导入 / 重置用） ---------- */
 function replaceDeck(newDeck: Deck | Record<string, unknown>, opts?: { keepHistory?: boolean; newChat?: boolean }) {
   if (!opts?.keepHistory) pushHistory()
+  // 自动备份：newChat=true 时说明是生成整套/重置等“覆盖性操作”，把当前 deck 存入 .bak
+  if (opts?.newChat && state.deck?.slides?.length) {
+    try { localStorage.setItem(LS_KEY + '.bak', JSON.stringify(state.deck)) } catch (e) {}
+  }
   suppressHistory = true
   let d = newDeck as Deck
   if (!d || typeof d !== 'object') d = {} as Deck
@@ -663,6 +691,19 @@ function clearChat(chatId: string) {
   try { localStorage.removeItem(CHAT_PREFIX + chatId) } catch (e) {}
 }
 
+/** 恢复上一次被覆盖的 deck（生成整套/重置前的自动备份） */
+function recoverBackup(): boolean {
+  try {
+    const bak = localStorage.getItem(LS_KEY + '.bak')
+    if (!bak) return false
+    const d = JSON.parse(bak)
+    if (!d || !d.slides || !d.slides.length) return false
+    replaceDeck(d)
+    localStorage.removeItem(LS_KEY + '.bak')
+    return true
+  } catch (e) { return false }
+}
+
 /* ---------- 导出 ---------- */
 export const store = {
   // 状态（响应式）
@@ -699,4 +740,6 @@ export const store = {
   getTemplates, getUserTemplates, saveCurrentAsTemplate, addSlideFromTemplate, deleteTemplate,
   // 会话管理
   getChatId, getChat, setChat, clearChat, newChatId,
+  // 备份恢复
+  recoverBackup,
 }