优化: aichat 体验收尾(useAiEvents拆分4子域 + AIC-FIX P1队列/mutex/缓存 + i18n残留抽取)

src/composables/ai/useAiConversations.ts

@@ -7,10 +7,9 @@
 import { aiApi } from '@/api'
 import { useAppSettingsStore } from '@/stores/appSettings'
 import { state } from '@/stores/ai'
-import { notifyConversationChanged } from './useAiEvents'
 import { persistUiState } from './useAiPanel'
 import { setStreaming } from './streamingGuard'
-import { nextMsgId, getConvState, clearConvStreamState, startApprovalTimer, clearAllApprovalTimers, switchingConvs, getConvStreamState, setConvCurrentText } from './aiShared'
+import { nextMsgId, getConvState, clearConvStreamState, clearLastDelta, startApprovalTimer, clearAllApprovalTimers, switchingConvs, getConvStreamState, setConvCurrentText, notifyConversationChanged } from './aiShared'
 import { t } from '@/i18n/i18n-helpers'
 import type { AiConversationDetail, AiMessage, AiToolCallInfo, ConvId } from '@/api/types'
 
@@ -425,14 +424,16 @@ export async function switchConversation(id: string, force = false) {
 /** 删除会话;若删的是当前活跃会话则清空消息+移除活跃 id 持久化。
  *  G3.4:收敛进 withConvOp(乐观移除列表 + 失败回滚 + 错误气泡),原裸 await 失败抛 unhandled rejection。 */
 async function deleteConversation(id: string) {
-  // AIC-FIX-17-P0-2:删除会话时清空所有审批计时器(防已删会话的过期 timer 到期误拒审批 +
-  // 错误气泡推错视图)。
+  // 删除会话时清空所有审批计时器(防已删会话的过期 timer 到期误拒审批 + 错误气泡推错视图)
   clearAllApprovalTimers()
   const conv = state.conversations.find(c => c.id === id)
   const prevIndex = conv ? state.conversations.indexOf(conv) : -1
   const wasActive = state.activeConversationId === id
   const prevActive = state.activeConversationId
   const prevMessages = state.messages
+  // 删活跃会话前捕获相邻会话(删除后回落,避免空白无引导)
+  const neighbor = wasActive ? (state.conversations[prevIndex + 1] ?? state.conversations[prevIndex - 1]) : null
+  const neighborId = neighbor?.id ?? null
   const ok = await withConvOp(
     () => {
       // 乐观:从列表移除 + 若删的是活跃会话则清空视图
@@ -459,18 +460,20 @@ async function deleteConversation(id: string) {
   )
   // 注意:op 返回 void,成功=undefined、失败=null(不能 `!ok`——undefined 也 falsy 会误判失败)
   if (ok === null) return // 失败已回滚 + 推气泡,保持原视图
-  // F-09 per-conv:清该会话的 stream state(streaming/currentText),防 convStreamStates Map 无限增长
-  // (与 convStates/待审批等 per-conv 资源同款会话级清理语义)。
+  // 清该会话的 stream state 与 delta 去重记录,防 per-conv Map 无限增长
   clearConvStreamState(id)
+  clearLastDelta(id)
   if (wasActive) {
     void appSettings.remove('df-ai-active-conv')
-    // G3.5:删除活跃会话 → load_more 游标复位(无 active 视图)
+    // 删除活跃会话 → load_more 游标复位(无 active 视图)
     loadMoreCursor.hasMore = false
     loadMoreCursor.earliestSeq = null
     loadMoreCursor.convId = null
     loadMoreCursor.loading = false
   }
   await loadConversations()
+  // 删的是活跃会话:回落相邻会话作为新活跃视图
+  if (neighborId) await switchConversation(neighborId)
   notifyConversationChanged()
 }