feat(songs): 歌曲管理支持批量驳回、投稿留言自动审查与排期范围可见性过滤

- 新增 /api/admin/songs/batch-reject.post 批量驳回接口（事务清排期/投票/扣接纳数/黑名单去重/异步通知）
- requireSongAdmin 三角色校验 + createApiError 统一错误包装
- scheduleDaysBefore/After 四字段排期可见范围限制（开放 API 与公开排期接口三处缓存路径 + DB 条件过滤）
- submissionNoteAutoModeration 基于黑名单 KEYWORD/LANGUAGE/GENRE 自动判定留言 publicStatus，命中自动关闭 submissionNotePublic
- 更新 songs/request.post 与 songs/[id]/update.put 接入自动审查逻辑

nuxt.config.ts

@@ -40,11 +40,51 @@ export default defineNuxtConfig({
   },
   modules: [
     '@nuxtjs/tailwindcss',
-    ...(process.env.NODE_ENV === 'development' || process.env.npm_lifecycle_event?.includes('lint')
+    ...((process.env.NODE_ENV === 'development' || process.env.npm_lifecycle_event?.includes('lint'))
       ? ['@nuxt/eslint']
+      : []),
+    ...((process.env.PWA_ENABLED || 'false') === 'true'
+      ? ['@vite-pwa/nuxt']
       : [])
   ],
 
+  pwa: (process.env.PWA_ENABLED || 'false') === 'true'
+    ? {
+        registerType: 'autoUpdate',
+        manifest: {
+          name: process.env.NUXT_PUBLIC_SITE_TITLE || '校园广播站点歌系统',
+          short_name: process.env.NUXT_PUBLIC_SITE_TITLE || 'VoiceHub',
+          description: process.env.NUXT_PUBLIC_SITE_DESCRIPTION || '校园广播站点歌系统',
+          display: (process.env.PWA_DISPLAY as any) || 'standalone',
+          background_color: process.env.PWA_BACKGROUND_COLOR || '#000000',
+          theme_color: process.env.PWA_THEME_COLOR || '#111111',
+          icons: [
+            {
+              src: '/images/logo.png',
+              sizes: '192x192',
+              type: 'image/png'
+            },
+            {
+              src: '/images/logo.png',
+              sizes: '512x512',
+              type: 'image/png'
+            }
+          ]
+        },
+        workbox: {
+          navigateFallback: '/',
+          globPatterns: ['**/*.{js,css,html,png,jpg,jpeg,svg,ico,webp,woff2}']
+        },
+        client: {
+          installPrompt: true,
+          periodicSyncForUpdates: 3600
+        },
+        devOptions: {
+          enabled: process.env.NODE_ENV === 'development'
+        }
+      }
+    : {},
+
   // 引入全局CSS
   css: [
     '~/assets/css/variables.css',
@@ -150,6 +190,10 @@ export default defineNuxtConfig({
         },
         // 移动端优化
         { name: 'theme-color', content: '#111111' },
+        {
+          name: 'x-default-theme',
+          content: process.env.NUXT_PUBLIC_DEFAULT_THEME || 'System'
+        },
         { name: 'apple-mobile-web-app-capable', content: 'yes' },
         { name: 'apple-mobile-web-app-status-bar-style', content: 'black-translucent' },
         { name: 'apple-mobile-web-app-title', content: 'VoiceHub管理' },
@@ -162,22 +206,25 @@ export default defineNuxtConfig({
           tagPosition: 'head',
           children: [
             `(function(){try{`,
-            `  var k='voicehub:theme', d=document, r=d.documentElement, s=null;`,
+            `  var k='voicehub:theme', d=document, r=d.documentElement, s=null, eff=null;`,
             `  try{s=localStorage.getItem(k)}catch(e){s=null}`,
             `  if(!s){`,
             `    try{`,
             `      var meta=document.querySelector('meta[name="x-default-theme"]');`,
             `      if(meta && meta.content){s=meta.content}`,
             `    }catch(e){s=null}`,
-            `    if(!s){s=window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'}`,
+            `    if(!s){s='System'}`,
             `  }`,
-            `  r.setAttribute('data-theme', s);`,
-            `  if(s==='dark'){r.classList.add('dark'); r.style.colorScheme='dark'}`,
-            `  else if(s==='light'){r.classList.add('light'); r.style.colorScheme='light'}`,
-            `  else{r.style.colorScheme='light dark'}`,
+            `  if(s==='System'||s==='system'){eff=window.matchMedia('(prefers-color-scheme: dark)').matches?'dark':'light'}`,
+            `  else if(typeof s==='string'){eff=s.endsWith('Dark')||s==='dark'?'dark':(s.endsWith('Light')||s==='light'?'light':s)}`,
+            `  else{eff='dark'}`,
+            `  r.setAttribute('data-theme', (typeof s==='string'?s:eff));`,
+            `  if(eff==='dark'){r.classList.add('dark'); r.classList.remove('light'); r.style.colorScheme='dark'}`,
+            `  else if(eff==='light'){r.classList.add('light'); r.classList.remove('dark'); r.style.colorScheme='light'}`,
+            `  else{r.classList.remove('dark','light'); r.style.colorScheme='light dark'}`,
             `  try{`,
             `    var tm=d.querySelector('meta[name="theme-color"]');`,
-            `    if(tm){tm.content=(s==='light'?'#f8fafc':'#111111')}`,
+            `    if(tm){tm.content=(eff==='light'?'#f8fafc':'#111111')}`,
             `  }catch(e){}`,
             `}catch(e){}})();`
           ].join('')