diff --git a/src/composables/ai/aiShared.ts b/src/composables/ai/aiShared.ts
index e7f8a0b..460594d 100644
--- a/src/composables/ai/aiShared.ts
+++ b/src/composables/ai/aiShared.ts
@@ -175,13 +175,8 @@ export function startApprovalTimer(
     denyP.catch(e => {
       console.error('[AI] 审批超时自动拒绝 IPC 未送达:', e)
     })
-    getMessages().push({
-      id: `approval-timeout-${nextMsgId()}` as MessageId,
-      role: 'assistant',
-      content: t('ai.approvalTimeout', { toolName }),
-      isError: true,
-      timestamp: Date.now(),
-    })
+    // UX-P2-A3:气泡推送改经 per-conv 守卫(函数追加在本文件尾部),后台会话超时不串当前视图
+    pushApprovalTimeoutBubble(toolName, toolCallId)
   }, timeoutMs)
   _approvalTimers.set(toolCallId, { timer, startedAt: Date.now(), timeoutMs })
 }
@@ -665,3 +660,37 @@ export function clearConvAgentFinished(convId: string | null | undefined): void
   if (!convId) return
   convAgentFinished.delete(convId)
 }
+
+// ── UX-P2-A3 审批超时错误气泡 per-conv 守卫 ──
+//
+// 背景:startApprovalTimer 到点把「审批超时已自动拒绝」错误气泡直接推进 getMessages()
+// (当前活跃视图),后台会话 A 的审批超时,气泡落在用户正查看的会话 B 里(跨会话串扰)。
+// 本守卫按审批所属 conv 过滤:仅当审批所属会话是当前活跃会话(或无法归属)才推视图气泡;
+// 后台会话的超时拒绝 IPC 照常执行,只是不串视图。
+// 归属反查:到点时刻从 per-conv 待审批集合(convPendingApprovals)按 toolCallId 反查 convId——
+// 此时拒绝 IPC 才刚发出,审批结果事件未到,集合项必在;查不到(旧数据/已被清)保守回落为推,
+// 不改变无归属场景的原行为。
+export function pushApprovalTimeoutBubble(toolName: string, toolCallId: string): void {
+  let convId: string | null = null
+  for (const [k, arr] of convPendingApprovals) {
+    if (arr.some(p => p.id === toolCallId)) {
+      convId = k
+      break
+    }
+  }
+  const active = getState()?.activeConversationId ?? null
+  if (convId && convId !== active) return
+  getMessages().push({
+    id: `approval-timeout-${nextMsgId()}` as MessageId,
+    role: 'assistant',
+    content: t('ai.approvalTimeout', { toolName }),
+    isError: true,
+    timestamp: Date.now(),
+  })
+}
+
+/** 队列被清空的统一提示(UX-P2-A2:AiError/regenerate/editMessage 清队从静默改 toast,
+ *  清 0 条不提示;经 ai-toast 事件总线,AiChat 本地 toast 消费) */
+export function notifyQueueCleared(n: number): void {
+  if (n > 0) void emit('ai-toast', { msg: t('ai.queueCleared', { n }), type: 'warning' })
+}
diff --git a/src/composables/ai/streamingGuard.ts b/src/composables/ai/streamingGuard.ts
index e6997e1..c294386 100644
--- a/src/composables/ai/streamingGuard.ts
+++ b/src/composables/ai/streamingGuard.ts
@@ -21,7 +21,7 @@
 //! streaming 是 boolean 无真正非法跃迁,guard 价值在集中入口与日志而非拦截。
 
 import { state } from '@/stores/ai'
-import { convStates, getConvStreamState, setConvStreaming } from './aiShared'
+import { convStates, getConvStreamState, setConvStreaming, setConvCurrentText } from './aiShared'
 import { useAppSettingsStore } from '@/stores/appSettings'
 
 /// feature flag key(appSettings KV)。关=回退散布语义(灰度/回退用)。
@@ -88,10 +88,9 @@ export function setStreaming(
  * TD-260621-01 per-conv:看门狗超时携带 convId 时,经 setStreaming 仅复位该会话 streaming 态;
  * 该会话的 convStates 项由各自会话收尾事件精确管理(on/off 后端均会 emit 收尾态)。
  *
- * 注:currentText/queue 仍是单例(F-09 域,本批不动),per-conv 超时在多会话并发下
- * 会清当前累积的 currentText——但 currentText 仅活跃视图写入(useAiEvents handleEvent delta 累积),
- * 而超时仅发生在该 conv 长时间无数据,此场景 currentText 多为空或已 flush,
- * 实际误伤面远小于 generatingConvs 全清(队列 queue 的清理由 F-09 统一改,见 TD-260621-01 注释)。
+ * 注:currentText/queue 已随 UX-P2-A4 改 per-conv 键控:带 convId 的兜底只清该会话的
+ * 排队项与流式缓冲,不再连带清其他会话的排队消息(多会话并发下 queue 是跨会话混排数组,
+ * 原全清会把 B 会话排队一并丢掉);无 convId 全局兜底语义不变(全清)。
  *
  * @param reason 兜底来源(日志可观测)
  * @param convId 关联会话 id(看门狗 per-conv 超时传;省略=全局兜底)
@@ -99,8 +98,16 @@ export function setStreaming(
 export function forceResetStreaming(reason: string, convId?: string): void {
   console.warn(`[AI-Guard] forceResetStreaming(卡死兜底): ${reason} (convId=${convId ?? 'none'})`)
   setStreaming(false, { convId: convId ?? null, reason })
-  state.currentText = ''
-  state.queue = []
+  // UX-P2-A4:per-conv 键控清理——带 convId 只清该会话排队项(currentText 同步走 per-conv 键,
+  // state.currentText 是委派活跃会话的 accessor,后台 conv 超时原写法会误清当前视图缓冲);
+  // 无 convId 全局兜底保持全清(卡死恢复场景,精确性不重要)。
+  if (convId) {
+    state.queue = state.queue.filter(q => q.conversationId !== convId)
+    setConvCurrentText(convId, '')
+  } else {
+    state.currentText = ''
+    state.queue = []
+  }
   // BUG-2026-07-17 根治:同时清理 convStates 项。
   // 原实现仅清 streaming/currentText/queue,但按钮 stopBtnState 优先读 convStates
   // (ChatInput.vue:243),convStates=generating 时仍显红色停止按钮。后端未发
diff --git a/src/composables/ai/useAiConversations.ts b/src/composables/ai/useAiConversations.ts
index a91f0be..947831d 100644
--- a/src/composables/ai/useAiConversations.ts
+++ b/src/composables/ai/useAiConversations.ts
@@ -4,6 +4,7 @@
 //! - 多处调 useAiEvents.notifyConversationChanged
 //! - newConversation/switchConversation 写 appSettings 持久化活跃会话 id
 
+import { ref } from 'vue'
 import { aiApi } from '@/api'
 import { useAppSettingsStore } from '@/stores/appSettings'
 import { state } from '@/stores/ai'
@@ -545,9 +546,22 @@ type ConvOpFailKey =
   | 'renameConvFail' | 'archiveConvFail' | 'pinConvFail'
   | 'newConvFail' | 'deleteConvFail' | 'switchConvFail'
 
-/** M30:写后端 IPC 失败时推送错误气泡(对齐 loadConversations/switchConversation 的失败反馈),
- *  保持侧栏已有交互不被无声吞掉(原仅向上抛,调用方 store 直调无 try → 异常进 unhandledrejection)。 */
+/** UX走查 P2-7:rename/archive/pin 失败的侧栏就近通知(发布-订阅)。每次失败发布新对象,
+ *  ConversationSidebar watch 到即弹 toast;本模块不感知展示细节(翻译/计时归订阅方)。 */
+export const convOpFailNotice = ref<{
+  key: ConvOpFailKey
+  params?: Record<string, string | number>
+} | null>(null)
+
+/** M30:写后端 IPC 失败时推送反馈,保持侧栏已有交互不被无声吞掉(原仅向上抛,调用方 store
+ *  直调无 try → 异常进 unhandledrejection)。UX走查 P2-7 分流:rename/archive/pin 发起与
+ *  视线焦点都在侧栏,改发 convOpFailNotice 由侧栏弹就近 toast,不再推进聊天流(错误气泡
+ *  视线错位,且消息区被清空/切换后不可见);new/delete/switch 与聊天区强关联,仍走错误气泡。 */
 function pushConvOpFail(key: ConvOpFailKey, params?: Record<string, string | number>) {
+  if (key === 'renameConvFail' || key === 'archiveConvFail' || key === 'pinConvFail') {
+    convOpFailNotice.value = { key, params }
+    return
+  }
   state.messages.push({
     id: `conv-op-fail-${nextMsgId()}`,
     role: 'assistant',
diff --git a/src/composables/ai/useAiLifecycleEvents.ts b/src/composables/ai/useAiLifecycleEvents.ts
index 1e3104f..2b45bb9 100644
--- a/src/composables/ai/useAiLifecycleEvents.ts
+++ b/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({
diff --git a/src/composables/ai/useAiSend.ts b/src/composables/ai/useAiSend.ts
index b87c804..8df354d 100644
--- a/src/composables/ai/useAiSend.ts
+++ b/src/composables/ai/useAiSend.ts
@@ -24,7 +24,16 @@ import { t } from '@/i18n/i18n-helpers'
 import { resetStreamWatchdog, clearStreamWatchdog, clearResumeAttempts } from './useAiStream'
 import { setStreaming } from './streamingGuard'
 import { startListener } from './useAiEvents'
-import { nextMsgId, startApprovalTimer, clearApprovalTimer, clearAllApprovalTimers, resolveAiLang, convStates, setConvCurrentText, setConvStreaming, flushCurrentText } from './aiShared'
+import { nextMsgId, startApprovalTimer, clearApprovalTimer, clearAllApprovalTimers, resolveAiLang, convStates, setConvCurrentText, setConvStreaming, flushCurrentText, notifyQueueCleared, classifySendError, type SendErrorKind } from './aiShared'
+
+/// UX-P2-A5:drainQueue 失败气泡的错误分类文案映射(分类逻辑 aiShared.classifySendError,
+/// 键复用 ChatInput 发送失败 toast 同一批 aiChat.sendErr* 文案,原始错误经 { msg } 细节保留)
+const QUEUED_SEND_ERR_KEY: Record<SendErrorKind, string> = {
+  rate_limit: 'aiChat.sendErrRateLimit',
+  quota: 'aiChat.sendErrQuota',
+  network: 'aiChat.sendErrNetwork',
+  other: 'aiChat.toastSendFail',
+}
 
 /// 待发送队列上限（超过抛错提示用户）
 const QUEUE_LIMIT = 10
@@ -163,9 +172,12 @@ async function regenerate() {
 
   setStreaming(true, { convId: state.activeConversationId, reason: 'regenerate' })
   state.currentText = ''
-  // 只清当前会话的排队消息,不误伤其他会话
+  // 只清当前会话的排队消息,不误伤其他会话;
+  // UX-P2-A2:清队从静默改 toast 提示条数(排队消息无声消失原无任何反馈)
   const regenConvId = state.activeConversationId
+  const droppedQueued = state.queue.filter(q => q.conversationId === regenConvId).length
   state.queue = state.queue.filter(q => q.conversationId !== regenConvId)
+  notifyQueueCleared(droppedQueued)
   // 会话态走 per-conv 键(与 doSend 一致),不再落 legacy 单 timer fallback
   resetStreamWatchdog(regenConvId || undefined)
 
@@ -236,9 +248,12 @@ async function editMessage(newMessage: string) {
 
   setStreaming(true, { convId: state.activeConversationId, reason: 'editMessage' })
   state.currentText = ''
-  // 只清当前会话的排队消息,不误伤其他会话
+  // 只清当前会话的排队消息,不误伤其他会话;
+  // UX-P2-A2:清队从静默改 toast 提示条数(排队消息无声消失原无任何反馈)
   const editConvId = state.activeConversationId
+  const droppedQueued = state.queue.filter(q => q.conversationId === editConvId).length
   state.queue = state.queue.filter(q => q.conversationId !== editConvId)
+  notifyQueueCleared(droppedQueued)
   // 会话态走 per-conv 键(与 doSend 一致),不再落 legacy 单 timer fallback
   resetStreamWatchdog(editConvId || undefined)
 
@@ -301,10 +316,12 @@ export function drainQueue(convId?: string | null) {
       // 仅目标会话为当前视图才推错误气泡(后台会话续发失败不污染当前视图;错误消息留在队列
       // 供切回后编辑/重试/取消)
       if (targetId === state.activeConversationId) {
+        // UX-P2-A5:失败气泡接入 classifySendError 分类文案(对齐 ChatInput 发送失败 toast 四类),
+        // 替代原 raw 错误直出的 ai.queuedSendFailed;原始错误串经 { msg } 细节保留
         state.messages.push({
           id: `err-${nextMsgId()}`,
           role: 'assistant',
-          content: t('ai.queuedSendFailed', { error: errMsg }),
+          content: t(QUEUED_SEND_ERR_KEY[classifySendError(errMsg)], { msg: errMsg }),
           isError: true,
           timestamp: Date.now(),
         } as AiMessage)
diff --git a/src/composables/task/useTaskKanban.ts b/src/composables/task/useTaskKanban.ts
index 0457ce3..541df7b 100644
--- a/src/composables/task/useTaskKanban.ts
+++ b/src/composables/task/useTaskKanban.ts
@@ -2,7 +2,7 @@ import { ref } from 'vue'
 import Sortable from 'sortablejs'
 import { useI18n } from 'vue-i18n'
 import { taskApi } from '@/api/task'
-import { TASK_STATUS_TRANSITIONS } from '@/constants/project'
+import { TASK_STATUS_TRANSITIONS, taskStatusLabel } from '@/constants/project'
 import { useToast } from '../useToast'
 
 export function useTaskKanban(opts: {
@@ -15,6 +15,8 @@ export function useTaskKanban(opts: {
   let s: Sortable[] = []
   let _dragId: string | null = null
   let _executing = false
+  // 最近一次被拒的流转方向:onMove 只记录不提示(避免拖拽悬停过程误报),onEnd 弹回时消费并清空
+  let _rejected: { from: string; to: string } | null = null
 
   function destroy() { s.forEach(x => x.destroy()); s = [] }
 
@@ -30,12 +32,16 @@ export function useTaskKanban(opts: {
         onMove: (e) => {
           const from = (e.from as HTMLElement).dataset.status ?? ''
           const to = ((e.to as HTMLElement).closest('[data-status]') as HTMLElement)?.dataset.status ?? ''
-          if (from === to) return true
-          return TASK_STATUS_TRANSITIONS[from]?.includes(to) ?? false
+          if (from === to) { _rejected = null; return true }
+          const legal = TASK_STATUS_TRANSITIONS[from]?.includes(to) ?? false
+          // UX走查 P2-5:非法流转只记录方向;合法流转清掉旧拒绝,避免陈旧标记污染后续 onEnd 判断
+          _rejected = legal ? null : { from, to }
+          return legal
         },
         onStart: (e) => {
           _dragId = (e.item as HTMLElement).dataset.taskId ?? null
           _executing = false
+          _rejected = null
         },
         onEnd: async (e) => {
           if (_executing) return
@@ -44,7 +50,22 @@ export function useTaskKanban(opts: {
           const to = ((e.to as HTMLElement).closest('[data-status]') as HTMLElement)?.dataset.status
           const id = _dragId
           _dragId = null
-          if (!to || !from || to === from) { _executing = false; return }
+          if (!to || !from || to === from) {
+            // UX走查 P2-5:非法流转被 onMove 拒绝时卡片弹回原列(落点 to===from),
+            // 此处补一条原因 toast,替代原先的静默弹回(原因与父卡 tooltip 同源:状态机流转表)
+            if (_rejected) {
+              showToast(
+                t('tasks.kanban.illegalMove', {
+                  from: t(taskStatusLabel(_rejected.from)),
+                  to: t(taskStatusLabel(_rejected.to)),
+                }),
+                'error',
+              )
+              _rejected = null
+            }
+            _executing = false
+            return
+          }
           if (!id) { _executing = false; return }
           kanbanBusy.value = true
           try {