优化: aichat 打磨收尾(切换信任保留 + save并发串行 + 后台授权守卫 + 分离窗口失效 + 气泡截图复制)

src/components/ai/MessageList.vue

@@ -518,6 +518,42 @@ async function copyMsgContent(msg: AiMessage): Promise<void> {
   })
 }
 
+// ── 消息气泡复制为图片(html2canvas 渲染 PNG 写入剪贴板) ──
+// 原生 ClipboardItem 即可写图片到剪贴板,故不加 Tauri 剪贴板插件(少装依赖)
+async function copyMsgAsImage(msg: AiMessage): Promise<void> {
+  const bubble = messagesContainer.value?.querySelector<HTMLElement>(
+    `.ai-msg[data-msg-id="${msg.id}"] .ai-msg-bubble`,
+  )
+  if (!bubble) {
+    emit('toast', { msg: t('aiChat.copyAsImageFailed'), type: 'error' })
+    return
+  }
+  try {
+    const { default: html2canvas } = await import('html2canvas')
+    const canvas = await html2canvas(bubble, { backgroundColor: null, useCORS: true, scale: 2 })
+    const blob = await new Promise<Blob | null>((resolve) => canvas.toBlob(resolve, 'image/png'))
+    if (!blob) throw new Error('toBlob failed')
+    if (typeof ClipboardItem !== 'undefined') {
+      try {
+        await navigator.clipboard.write([new ClipboardItem({ 'image/png': blob })])
+        emit('toast', { msg: t('aiChat.copiedAsImage'), type: 'info' })
+        return
+      } catch {
+        // 剪贴板被拒/不可用时降级下载,保证用户仍能拿到图片
+      }
+    }
+    const url = URL.createObjectURL(blob)
+    const a = document.createElement('a')
+    a.href = url
+    a.download = 'message.png'
+    a.click()
+    URL.revokeObjectURL(url)
+    emit('toast', { msg: t('aiChat.copiedAsImage'), type: 'info' })
+  } catch {
+    emit('toast', { msg: t('aiChat.copyAsImageFailed'), type: 'error' })
+  }
+}
+
 // ── UX-03: 错误气泡操作入口 ──
 // errorType 经 useAiEvents push 错误消息时附带(types.ts AiMessage 未含此字段,
 // 经 cast 读写闭环在 AiChat.vue / useAiEvents 两端,不污染 types.ts 定义)。
@@ -857,6 +893,14 @@ defineExpose({
             >
               <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"/><path d="M5 15H4a2 2 0 01-2-2V4a2 2 0 012-2h9a2 2 0 012 2v1"/></svg>
             </button>
+            <button
+              v-if="item.msg.content"
+              class="ai-copy-btn ai-copy-btn--ai ai-copy-btn--image"
+              :title="$t('aiChat.copyAsImage')"
+              @click.stop="copyMsgAsImage(item.msg)"
+            >
+              <svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M23 19a2 2 0 0 1-2 2H3a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h4l2-3h6l2 3h4a2 2 0 0 1 2 2z"/><circle cx="12" cy="13" r="4"/></svg>
+            </button>
           </div>
           <!-- 流式开始但尚无文本时显示光标 -->
           <div v-else-if="isLastAi(item.msg) && isViewingGenerating" class="ai-msg-bubble ai-msg-bubble--ai">
@@ -1239,6 +1283,10 @@ defineExpose({
 .ai-copy-btn:hover {
   background: rgba(0, 0, 0, 0.55);
 }
+/* 图片复制按钮排在文本复制按钮左侧(right 让位 22px 按钮 + 4px 间距) */
+.ai-copy-btn--image {
+  right: 30px;
+}
 
 /* ── UX-09: 末条 user 消息编辑按钮(hover 显示,回填输入框编辑重生成) ── */
 .ai-msg-edit-btn {

src/composables/ai/aiShared.ts

@@ -18,8 +18,8 @@ import { t } from '@/i18n/i18n-helpers'
 import type { AiMessage, AiToolCallInfo, ConvState, MessageId } from '@/api/types'
 
 /** 通知会话列表刷新(newConversation/deleteConversation/rename 等触发侧栏更新) */
-export function notifyConversationChanged(): void {
-  emit('ai-conversation-changed', {})
+export function notifyConversationChanged(payload?: { deletedConvId?: string }): void {
+  emit('ai-conversation-changed', payload ?? {})
 }
 
 /** 后端原始错误转用户友好提示 */

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 } from './aiShared'
+import { convStates, getConvStreamState, setConvStreaming } from './aiShared'
 import { useAppSettingsStore } from '@/stores/appSettings'
 
 /// feature flag key(appSettings KV)。关=回退散布语义(灰度/回退用)。
@@ -56,14 +56,14 @@ export function setStreaming(
 
   // flag 关:回退散布语义,直接赋值不动其他。
   if (!isGuardEnabled()) {
-    state.streaming = value
+    if (convId) setConvStreaming(convId, value)
+    else state.streaming = value
     return
   }
 
-  const prev = state.streaming
+  const prev = convId ? (getConvStreamState(convId)?.streaming ?? false) : state.streaming
 
-  // 幂等观测:同值重复写不拒绝(resetStreamWatchdog 等副作用场景需合法重入),
-  // 仅记 debug 日志供排查「为何重复置位」的卡死场景。
+  // 幂等观测:同值重复写不拒绝,仅记 debug 日志供排查卡死场景。
   if (prev === value) {
     console.debug(
       `[AI-Guard] setStreaming 幂等(prev=${prev}, convId=${convId ?? 'none'}, reason=${reason ?? 'unknown'})`,
@@ -74,9 +74,9 @@ export function setStreaming(
     )
   }
 
-  // 批4 双轨收口:generating 态真相归 convStates(enum),本 guard 不再联动 generatingConvs
-  // (bool 轨已退役)。streaming 单值是另一条过渡态(F-09 per-conv streaming 收口前保留)。
-  state.streaming = value
+  // 显式 convId 写目标会话 per-conv 流式态;缺省写当前活跃会话(单会话语义不变)。
+  if (convId) setConvStreaming(convId, value)
+  else state.streaming = value
 }
 
 /**

src/composables/ai/useAiConversations.ts

@@ -474,7 +474,7 @@ async function deleteConversation(id: string) {
   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()
+  notifyConversationChanged({ deletedConvId: id })
 }
 
 /** 会话操作失败气泡的 i18n key(M30 族 rename/archive/pin + G3.4 new/delete + G3.3 switch 瞬态失败) */

src/composables/ai/useAiEvents.ts

@@ -15,8 +15,9 @@ import { listen, emit } from '@tauri-apps/api/event'
 import { aiApi } from '@/api'
 import { useAppSettingsStore } from '@/stores/appSettings'
 import { state } from '@/stores/ai'
-import { nextMsgId, setConvState, convStates, switchingConvs, getConvStreamState, setConvCurrentText, setConvStreaming, clearAllApprovalTimers, clearAllToolSlowTimers, flushCurrentText, friendlyError, notifyConversationChanged } from './aiShared'
+import { nextMsgId, setConvState, convStates, switchingConvs, getConvStreamState, setConvCurrentText, setConvStreaming, clearConvStreamState, clearAllApprovalTimers, clearAllToolSlowTimers, flushCurrentText, friendlyError, notifyConversationChanged } from './aiShared'
 import { resetStreamWatchdog, clearAllStreamWatchdogs } from './useAiStream'
+import { setStreaming } from './streamingGuard'
 import { loadConversations } from './useAiConversations'
 import { handleStreamingEvent } from './useAiStreamingEvents'
 import { handleToolEvent } from './useAiToolEvents'
@@ -140,7 +141,18 @@ export async function startListener() {
   _startPromise = (async () => {
     try {
       _unlistenAiEvent = await aiApi.onEvent(handleEvent)
-      _unlistenConvChanged = await listen('ai-conversation-changed', () => { void loadConversations() })
+      _unlistenConvChanged = await listen('ai-conversation-changed', (e) => {
+        void loadConversations()
+        // 主窗口删除了本窗口当前展示的会话:清空视图防陈旧幽灵(分离窗口独立 JS context,经事件同步)。
+        const deleted = (e.payload as { deletedConvId?: string } | undefined)?.deletedConvId
+        if (deleted && state.activeConversationId === deleted) {
+          state.activeConversationId = null
+          state.messages = []
+          clearConvStreamState(deleted)
+          setStreaming(false, { convId: deleted, reason: 'conv-deleted' })
+          convStates.delete(deleted)
+        }
+      })
       _unlistenApprovalClear = await listen('ai-approval-clear-timers', () => { clearAllApprovalTimers() })
       emit('ai-client-ready', { lastConvId: state.activeConversationId })
     } catch (err) {

src/composables/ai/useAiWindow.ts

@@ -204,12 +204,21 @@ export async function restoreGeneratingState(opts?: { fromMainPanel?: boolean; c
   if (!fromMainPanel) {
     state.currentText = (opts?.convId && localStorage.getItem(textKey(opts.convId))) || localStorage.getItem('df-ai-text') || ''
   }
-  state.messages.push({
-    id: `ai-${nextMsgId()}` as MessageId,
-    role: 'assistant',
-    content: '',
-    timestamp: Date.now(),
-  })
+  // 双占位去重:末条已是空 assistant 占位(本会话流式占位)则复用,不重复 push。
+  const lastMsg = state.messages[state.messages.length - 1]
+  const lastIsStreamingPlaceholder = !!lastMsg
+    && lastMsg.role === 'assistant'
+    && !lastMsg.content?.trim()
+    && !lastMsg.isError
+    && !(lastMsg.toolCalls && lastMsg.toolCalls.length)
+  if (!lastIsStreamingPlaceholder) {
+    state.messages.push({
+      id: `ai-${nextMsgId()}` as MessageId,
+      role: 'assistant',
+      content: '',
+      timestamp: Date.now(),
+    })
+  }
   setStreaming(true, { convId: gen, reason: 'restoreGeneratingState' })
   // 批4 双轨收口:恢复生成中态写 convStates(enum 真相源),替代旧 generatingConvs.add。
   // setStreaming 联动已退役(批4),streaming 单值与 convStates 项并行写无冲突。

src/i18n/en/aiChat.ts

@@ -143,6 +143,10 @@ export default {
     copyMsg: 'Copy message',
     copied: 'Copied',
     copyFailed: 'Copy failed',
+    // Copy bubble as image (html2canvas → clipboard; falls back to download)
+    copyAsImage: 'Copy as image',
+    copiedAsImage: 'Copied as image',
+    copyAsImageFailed: 'Failed to copy as image',
 
     // ── Message actions bar (UX-02) ──
     regenerate: 'Regenerate',

src/i18n/zh-CN/aiChat.ts

@@ -144,6 +144,10 @@ export default {
     copyMsg: '复制消息',
     copied: '已复制',
     copyFailed: '复制失败',
+    // 气泡复制为图片(html2canvas 渲染 → 剪贴板;失败降级下载)
+    copyAsImage: '复制为图片',
+    copiedAsImage: '已复制为图片',
+    copyAsImageFailed: '复制为图片失败',
 
     // ── 消息操作栏(UX-02) ──
     regenerate: '重新生成',