feat: 小程序脚本首页重构 + 社交数据导入 + TTS 播放优化

- 后端：新增社交数据导入/审批/洞察生成 API（SocialContent/SocialInsight）
- 后端：优化脚本上下文服务，TTS 服务增强
- 小程序：重构脚本首页布局，新增社交导入页面
- 小程序：新增 useTtsPlayer composable，移除旧 ScriptAudioPlayer 组件
- 小程序：新增社交导入服务，优化请求服务
- SQL：新增社交数据导入建表脚本
- 文档：补充设计文档和实施计划

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

mini-program/src/stores/app.js

@@ -251,7 +251,7 @@ const fetchRandomInspirations = async (size = 3) => {
   }
 }
 
-const generateScriptFromInspiration = async ({ prompt, style, length }) => {
+const generateScriptFromInspiration = async ({ prompt, style, length, useSocialInsights = true }) => {
   try {
     const profile = state.userProfile || state.registrationData
     const res = await epicScriptService.generateFromInspiration({
@@ -260,6 +260,7 @@ const generateScriptFromInspiration = async ({ prompt, style, length }) => {
       length,
       characterInfo: epicScriptService.buildCharacterInfo(profile),
       lifeEventsSummary: epicScriptService.buildLifeEventsSummary(state.events, profile),
+      useSocialInsights,
       source: 'mini-program'
     })
     await fetchScripts()