优化: 会话状态 per-conv 化与交互守卫

- 待审批跨会话 per-conv 合并,审批类事件全局放行
- 看门狗/重试计数/流式残段按会话键控迁移
- 输入草稿与子代理完成卡数据按会话隔离
- 切换兜底 activeId,收敛守卫防幽灵气泡
- 发送错误按限流/额度/网络分类文案

src/composables/ai/useAiToolEvents.ts

@@ -6,7 +6,7 @@
 import { emit } from '@tauri-apps/api/event'
 import { state } from '@/stores/ai'
 import { t } from '@/i18n/i18n-helpers'
-import { findToolCall, clearApprovalTimer, startApprovalTimer, startToolSlowTimer, clearToolSlowTimer } from './aiShared'
+import { findToolCall, clearApprovalTimer, startApprovalTimer, startToolSlowTimer, clearToolSlowTimer, addPendingApproval, removePendingApprovalById } from './aiShared'
 import { removePendingDirAuth } from './useAiPendingState'
 import { clearStreamWatchdog } from './useAiStream'
 import type { AiChatEvent, AiToolCallInfo } from '@/api/types'
@@ -43,7 +43,8 @@ export function handleToolEvent(event: AiChatEvent): boolean {
         tc.result = event.result
         tc.completedAt = Date.now()
       }
-      state.pendingApprovals = state.pendingApprovals.filter(p => p.id !== event.id)
+      // 移除待审批(含 per-conv 集合,后台会话集合里的同 id 挂起一并清)
+      removePendingApprovalById(event.id)
       clearToolSlowTimer(event.id)
       // 工具结束(无论审批通过后执行还是被拒),清审批超时计时器
       clearApprovalTimer(event.id)
@@ -68,19 +69,21 @@ export function handleToolEvent(event: AiChatEvent): boolean {
         reason: event.reason,
         conversationId: event.conversation_id ?? state.activeConversationId ?? undefined,
       }
-      state.pendingApprovals.push(info)
-      const tc = findToolCall(event.id)
-      if (tc) {
-        tc.status = 'pending_approval'
-        tc.reason = event.reason
-        // write_file 审批注入行级 diff(旧文件 vs 新内容),前端审批卡预览
-        if (event.diff) tc.diff = event.diff
+      // per-conv 归会话追加(同 id 幂等):跨会话事件不再互相覆盖;首次到达才做后续副作用
+      if (addPendingApproval(info)) {
+        const tc = findToolCall(event.id)
+        if (tc) {
+          tc.status = 'pending_approval'
+          tc.reason = event.reason
+          // write_file 审批注入行级 diff(旧文件 vs 新内容),前端审批卡预览
+          if (event.diff) tc.diff = event.diff
+        }
+        // 进入审批等待 → 取消该工具慢执行计时器(审批耗时由用户主导,非执行慢),再启动审批超时计时器
+        clearToolSlowTimer(event.id)
+        startApprovalTimer(event.id, event.name, 'risk')
+        // 通知 ToolCardList 展开折叠组 + scroll(pending 卡落折叠分组不可见时)
+        void emit('ai-pending-arrived', { toolCallId: event.id })
       }
-      // 进入审批等待 → 取消该工具慢执行计时器(审批耗时由用户主导,非执行慢),再启动审批超时计时器
-      clearToolSlowTimer(event.id)
-      startApprovalTimer(event.id, event.name, 'risk')
-      // 通知 ToolCardList 展开折叠组 + scroll(pending 卡落折叠分组不可见时)
-      void emit('ai-pending-arrived', { toolCallId: event.id })
       return true
     }
 
@@ -91,7 +94,8 @@ export function handleToolEvent(event: AiChatEvent): boolean {
           tc.status = 'rejected'
           tc.result = t('ai.aiTool.rejectedHint')
         }
-        state.pendingApprovals = state.pendingApprovals.filter(p => p.id !== event.id)
+        // 移除待审批(含 per-conv 集合)
+        removePendingApprovalById(event.id)
         clearToolSlowTimer(event.id)
         clearApprovalTimer(event.id)
       } else {