修复: 审批不超时+重启恢复 + 其他小改

- APPROVAL_TIMEOUT_MS=Infinity(已决策:审批不做超时)
- V33 迁移: ai_conversations 加 pending_approvals 列
- save_conversation 持久化 pending_approvals
- ai_conversation_switch 从 DB 恢复 pending_approvals
- switchConversation 加 try/catch(对话不存在→建新)
- @项目 关联添加取消按钮(×)
- TopBar 底部无标题时图标右对齐
- TaskDetail.vue 删除重复 case

src/composables/ai/aiShared.ts

@@ -71,7 +71,7 @@ export function findToolCall(id: string): AiToolCallInfo | undefined {
 // ── 审批超时计时器(原 useAiSend,下沉打破 events↔send 循环依赖) ──
 
 /// 审批等待超时阈值(ms) — 用户 5 分钟内不处理则自动拒绝
-const APPROVAL_TIMEOUT_MS = 5 * 60 * 1000
+const APPROVAL_TIMEOUT_MS = Infinity  // 已决策:不做超时,用户不审批就一直等
 
 /** toolCallId → 审批超时计时器 */
 const _approvalTimers = new Map<string, ReturnType<typeof setTimeout>>()

src/composables/ai/useAiConversations.ts

@@ -10,9 +10,9 @@ import { state } from '@/stores/ai'
 import { notifyConversationChanged } from './useAiEvents'
 import { persistUiState } from './useAiPanel'
 import { setStreaming } from './streamingGuard'
-import { nextMsgId, getConvState, clearConvStreamState } from './aiShared'
+import { nextMsgId, getConvState, clearConvStreamState, startApprovalTimer } from './aiShared'
 import { t } from '@/i18n/i18n-helpers'
-import type { AiMessage, AiToolCallInfo } from '@/api/types'
+import type { AiConversationDetail, AiMessage, AiToolCallInfo } from '@/api/types'
 
 const appSettings = useAppSettingsStore()
 
@@ -92,7 +92,22 @@ let _latestSwitchId = 0
 export async function switchConversation(id: string) {
   const mySwitchId = ++_latestSwitchId
   // 允许生成中切换:后台继续生成,事件按 conversation_id 路由不污染当前视图
-  const detail = await aiApi.switchConversation(id)
+  let detail: AiConversationDetail
+  try {
+    detail = await aiApi.switchConversation(id)
+  } catch {
+    // 对话不存在(已删除/未落库的虚 ID)→ 创建新对话替代
+    console.warn('[AI] switchConversation 失败,创建新对话:', id)
+    const created = await aiApi.createConversation()
+    if (mySwitchId !== _latestSwitchId) return
+    void appSettings.set('df-ai-active-conv', created.id)
+    // 用新对话 id 重走后续逻辑
+    detail = { id: created.id, title: null, messages: '[]' }
+    state.messages = []
+    notifyConversationChanged()
+    void loadConversations()
+    return
+  }
   // 过期响应丢弃(用户已切到别的对话,防 A 后返回覆盖 B)
   if (mySwitchId !== _latestSwitchId) return
   state.activeConversationId = id
@@ -226,6 +241,9 @@ export async function switchConversation(id: string) {
               dir: tc.dir,
               reason: tc.reason,
             })
+            // 重新启动审批计时器(APPROVAL_TIMEOUT_MS=Infinity 已决策,不会超时自动拒绝,
+            // 启动仅用于计时器注册一致性,保持与 AiApprovalRequired 事件处理对称)
+            startApprovalTimer(tc.id, tc.name, kind)
           }
         }
       }