refactor(dashboard): migrate plugin-api HTTP functions to ApiResponse pattern

- Migrate 14 HTTP functions in plugin-api.ts to return ApiResponse<T>
  - fetchPluginList, checkGitStatus, getMaimaiVersion
  - getInstalledPlugins, installPlugin, uninstallPlugin, updatePlugin
  - getPluginConfigSchema, getPluginConfig, getPluginConfigRaw
  - updatePluginConfig, updatePluginConfigRaw, resetPluginConfig, togglePlugin
- Update 3 caller files to handle ApiResponse pattern:
  - plugins.tsx: 5 function calls updated
  - plugin-config.tsx: 5 function calls updated
  - plugin-detail.tsx: 5 function calls updated
- All callers now check .success before accessing .data
- Preserve WebSocket and utility functions unchanged
- Build verification: npm run build succeeds with 0 errors

dashboard/src/routes/plugin-config.tsx

@@ -341,16 +341,44 @@ function PluginConfigEditor({ plugin, onBack }: PluginConfigEditorProps) {
   const loadConfig = useCallback(async () => {
     setLoading(true)
     try {
-      const [schemaData, configData, rawConfigData] = await Promise.all([
+      const [schemaResult, configResult, rawResult] = await Promise.all([
         getPluginConfigSchema(plugin.id),
         getPluginConfig(plugin.id),
         getPluginConfigRaw(plugin.id)
       ])
-      setSchema(schemaData)
-      setConfig(configData)
-      setOriginalConfig(JSON.parse(JSON.stringify(configData)))
-      setSourceCode(rawConfigData)
-      setOriginalSourceCode(rawConfigData)
+      
+      if (!schemaResult.success) {
+        toast({
+          title: '加载配置架构失败',
+          description: schemaResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
+      
+      if (!configResult.success) {
+        toast({
+          title: '加载配置数据失败',
+          description: configResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
+      
+      if (!rawResult.success) {
+        toast({
+          title: '加载原始配置失败',
+          description: rawResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
+      
+      setSchema(schemaResult.data)
+      setConfig(configResult.data)
+      setOriginalConfig(JSON.parse(JSON.stringify(configResult.data)))
+      setSourceCode(rawResult.data)
+      setOriginalSourceCode(rawResult.data)
     } catch (error) {
       toast({
         title: '加载配置失败',
@@ -433,7 +461,15 @@ function PluginConfigEditor({ plugin, onBack }: PluginConfigEditorProps) {
   // 重置配置
   const handleReset = async () => {
     try {
-      await resetPluginConfig(plugin.id)
+      const resetResult = await resetPluginConfig(plugin.id)
+      if (!resetResult.success) {
+        toast({
+          title: '重置失败',
+          description: resetResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
       toast({
         title: '配置已重置',
         description: '下次加载插件时将使用默认配置'
@@ -452,10 +488,18 @@ function PluginConfigEditor({ plugin, onBack }: PluginConfigEditorProps) {
   // 切换启用状态
   const handleToggle = async () => {
     try {
-      const result = await togglePlugin(plugin.id)
+      const toggleResult = await togglePlugin(plugin.id)
+      if (!toggleResult.success) {
+        toast({
+          title: '切换失败',
+          description: toggleResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
       toast({
-        title: result.message,
-        description: result.note
+        title: toggleResult.data.message,
+        description: toggleResult.data.note
       })
       loadConfig()
     } catch (error) {
@@ -723,8 +767,16 @@ function PluginConfigPageContent() {
   const loadPlugins = async () => {
     setLoading(true)
     try {
-      const data = await getInstalledPlugins()
-      setPlugins(data)
+      const installedResult = await getInstalledPlugins()
+      if (!installedResult.success) {
+        toast({
+          title: '加载插件列表失败',
+          description: installedResult.error,
+          variant: 'destructive'
+        })
+        return
+      }
+      setPlugins(installedResult.data)
     } catch (error) {
       toast({
         title: '加载插件列表失败',