优化: 会话状态键控与提示补全

- 队列清空/发送失败补提示,错误接入分类文案
- 审批超时气泡按会话归属,流守卫按会话清理
- 会话操作失败就近反馈,拖拽非法流转提示原因

src/composables/ai/useAiLifecycleEvents.ts

@@ -9,7 +9,7 @@ import { emit } from '@tauri-apps/api/event'
 import { useAppSettingsStore } from '@/stores/appSettings'
 import { state } from '@/stores/ai'
 import { t } from '@/i18n/i18n-helpers'
-import { nextMsgId, convStates, clearApprovalTimer, flushCurrentText, clearAllToolSlowTimers, friendlyError, notifyConversationChanged, clearLastDelta, discardConvPendingApprovals } from './aiShared'
+import { nextMsgId, convStates, clearApprovalTimer, flushCurrentText, clearAllToolSlowTimers, friendlyError, notifyConversationChanged, clearLastDelta, discardConvPendingApprovals, notifyQueueCleared } from './aiShared'
 import { clearTextIdleTimer, pendingMaxRounds, pendingHelp, pendingDirAuths } from './useAiPendingState'
 import { clearStreamWatchdog, clearResumeAttempts } from './useAiStream'
 import { setStreaming } from './streamingGuard'
@@ -176,10 +176,14 @@ export function handleLifecycleEvent(event: AiChatEvent): boolean {
 
     case 'AiError': {
       cleanupTerminatedConversation(event.conversation_id || '', 'AiError')
-      // 只清除出错会话的队列项,不误伤其他会话的排队消息
+      // 只清除出错会话的队列项,不误伤其他会话的排队消息;
+      // UX-P2-A2:清队从静默改 toast 提示条数(用户排队的消息无声消失原无任何反馈)
       if (event.conversation_id) {
+        const dropped = state.queue.filter(q => q.conversationId === event.conversation_id).length
         state.queue = state.queue.filter(q => q.conversationId !== event.conversation_id)
+        notifyQueueCleared(dropped)
       } else {
+        notifyQueueCleared(state.queue.length)
         state.queue = []
       }
       state.messages.push({