feat(export): add session name prefix toggle in layout dropdown

src/pages/ExportPage.scss

@@ -271,6 +271,68 @@
     line-height: 1.45;
   }
 
+  .layout-prefix-toggle {
+    margin-top: 4px;
+    padding: 10px;
+    border-top: 1px solid color-mix(in srgb, var(--border-color) 85%, transparent);
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 10px;
+  }
+
+  .layout-prefix-copy {
+    display: flex;
+    flex-direction: column;
+    gap: 2px;
+    min-width: 0;
+  }
+
+  .layout-prefix-label {
+    font-size: 12px;
+    color: var(--text-primary);
+    font-weight: 600;
+    line-height: 1.35;
+  }
+
+  .layout-prefix-desc {
+    font-size: 11px;
+    color: var(--text-secondary);
+    line-height: 1.4;
+  }
+
+  .layout-prefix-switch {
+    width: 38px;
+    height: 22px;
+    border-radius: 999px;
+    border: 1px solid var(--border-color);
+    background: var(--bg-secondary);
+    cursor: pointer;
+    padding: 2px;
+    display: inline-flex;
+    align-items: center;
+    transition: background 0.15s ease, border-color 0.15s ease;
+    flex-shrink: 0;
+
+    .layout-prefix-switch-thumb {
+      width: 16px;
+      height: 16px;
+      border-radius: 50%;
+      background: #fff;
+      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.22);
+      transition: transform 0.15s ease;
+    }
+
+    &.on {
+      background: rgba(var(--primary-rgb), 0.9);
+      border-color: rgba(var(--primary-rgb), 0.95);
+
+      .layout-prefix-switch-thumb {
+        transform: translateX(16px);
+      }
+    }
+  }
+
   .task-center-control {
     display: flex;
     flex-direction: column;

src/pages/ExportPage.tsx

@@ -750,10 +750,14 @@ const normalizeMessageCount = (value: unknown): number | undefined => {
 
 const WriteLayoutSelector = memo(function WriteLayoutSelector({
   writeLayout,
-  onChange
+  onChange,
+  sessionNameWithTypePrefix,
+  onSessionNameWithTypePrefixChange
 }: {
   writeLayout: configService.ExportWriteLayout
   onChange: (value: configService.ExportWriteLayout) => Promise<void>
+  sessionNameWithTypePrefix: boolean
+  onSessionNameWithTypePrefixChange: (enabled: boolean) => Promise<void>
 }) {
   const [isOpen, setIsOpen] = useState(false)
   const containerRef = useRef<HTMLDivElement | null>(null)
@@ -797,6 +801,23 @@ const WriteLayoutSelector = memo(function WriteLayoutSelector({
             <span className="layout-option-desc">{option.desc}</span>
           </button>
         ))}
+        <div className="layout-prefix-toggle">
+          <div className="layout-prefix-copy">
+            <span className="layout-prefix-label">聊天文本文件和会话文件夹带前缀</span>
+            <span className="layout-prefix-desc">开启后使用群聊_、私聊_、公众号_、曾经的好友_前缀</span>
+          </div>
+          <button
+            type="button"
+            className={`layout-prefix-switch ${sessionNameWithTypePrefix ? 'on' : ''}`}
+            onClick={async () => {
+              await onSessionNameWithTypePrefixChange(!sessionNameWithTypePrefix)
+            }}
+            aria-label="聊天文本文件和会话文件夹带前缀"
+            aria-pressed={sessionNameWithTypePrefix}
+          >
+            <span className="layout-prefix-switch-thumb" />
+          </button>
+        </div>
       </div>
     </div>
   )
@@ -1082,6 +1103,7 @@ function ExportPage() {
 
   const [exportFolder, setExportFolder] = useState('')
   const [writeLayout, setWriteLayout] = useState<configService.ExportWriteLayout>('B')
+  const [sessionNameWithTypePrefix, setSessionNameWithTypePrefix] = useState(true)
   const [snsExportFormat, setSnsExportFormat] = useState<SnsTimelineExportFormat>('html')
   const [snsExportImages, setSnsExportImages] = useState(false)
   const [snsExportLivePhotos, setSnsExportLivePhotos] = useState(false)
@@ -1456,7 +1478,7 @@ function ExportPage() {
     setIsBaseConfigLoading(true)
     let isReady = true
     try {
-      const [savedPath, savedMedia, savedVoiceAsText, savedExcelCompactColumns, savedTxtColumns, savedConcurrency, savedSessionMap, savedContentMap, savedSessionRecordMap, savedSnsPostCount, savedWriteLayout, exportCacheScope] = await Promise.all([
+      const [savedPath, savedMedia, savedVoiceAsText, savedExcelCompactColumns, savedTxtColumns, savedConcurrency, savedSessionMap, savedContentMap, savedSessionRecordMap, savedSnsPostCount, savedWriteLayout, savedSessionNameWithTypePrefix, exportCacheScope] = await Promise.all([
         configService.getExportPath(),
         configService.getExportDefaultMedia(),
         configService.getExportDefaultVoiceAsText(),
@@ -1468,6 +1490,7 @@ function ExportPage() {
         configService.getExportSessionRecordMap(),
         configService.getExportLastSnsPostCount(),
         configService.getExportWriteLayout(),
+        configService.getExportSessionNamePrefixEnabled(),
         ensureExportCacheScope()
       ])
 
@@ -1481,6 +1504,7 @@ function ExportPage() {
       }
 
       setWriteLayout(savedWriteLayout)
+      setSessionNameWithTypePrefix(savedSessionNameWithTypePrefix)
       setLastExportBySession(savedSessionMap)
       setLastExportByContent(savedContentMap)
       setExportRecordsBySession(savedSessionRecordMap)
@@ -2266,6 +2290,7 @@ function ExportPage() {
       displayNamePreference: options.displayNamePreference,
       exportConcurrency: options.exportConcurrency,
       sessionLayout,
+      sessionNameWithTypePrefix,
       dateRange: options.useAllTime
         ? null
         : options.dateRange
@@ -3708,6 +3733,11 @@ function ExportPage() {
               setWriteLayout(value)
               await configService.setExportWriteLayout(value)
             }}
+            sessionNameWithTypePrefix={sessionNameWithTypePrefix}
+            onSessionNameWithTypePrefixChange={async (enabled) => {
+              setSessionNameWithTypePrefix(enabled)
+              await configService.setExportSessionNamePrefixEnabled(enabled)
+            }}
           />
 
           <div className="task-center-control">

src/services/config.ts

@@ -33,6 +33,7 @@ export const CONFIG_KEYS = {
   EXPORT_DEFAULT_TXT_COLUMNS: 'exportDefaultTxtColumns',
   EXPORT_DEFAULT_CONCURRENCY: 'exportDefaultConcurrency',
   EXPORT_WRITE_LAYOUT: 'exportWriteLayout',
+  EXPORT_SESSION_NAME_PREFIX_ENABLED: 'exportSessionNamePrefixEnabled',
   EXPORT_LAST_SESSION_RUN_MAP: 'exportLastSessionRunMap',
   EXPORT_LAST_CONTENT_RUN_MAP: 'exportLastContentRunMap',
   EXPORT_SESSION_RECORD_MAP: 'exportSessionRecordMap',
@@ -410,6 +411,16 @@ export async function setExportWriteLayout(layout: ExportWriteLayout): Promise<v
   await config.set(CONFIG_KEYS.EXPORT_WRITE_LAYOUT, layout)
 }
 
+export async function getExportSessionNamePrefixEnabled(): Promise<boolean> {
+  const value = await config.get(CONFIG_KEYS.EXPORT_SESSION_NAME_PREFIX_ENABLED)
+  if (typeof value === 'boolean') return value
+  return true
+}
+
+export async function setExportSessionNamePrefixEnabled(enabled: boolean): Promise<void> {
+  await config.set(CONFIG_KEYS.EXPORT_SESSION_NAME_PREFIX_ENABLED, enabled)
+}
+
 export async function getExportLastSessionRunMap(): Promise<Record<string, number>> {
   const value = await config.get(CONFIG_KEYS.EXPORT_LAST_SESSION_RUN_MAP)
   if (!value || typeof value !== 'object') return {}

src/types/electron.d.ts

@@ -801,6 +801,7 @@ export interface ExportOptions {
   excelCompactColumns?: boolean
   txtColumns?: string[]
   sessionLayout?: 'shared' | 'per-session'
+  sessionNameWithTypePrefix?: boolean
   displayNamePreference?: 'group-nickname' | 'remark' | 'nickname'
   exportConcurrency?: number
 }