feat(content): add rich content rendering with @mentions and vote segments

- Add PostContentRenderer component for rendering posts/comments with segments
- Add PostMentionInput component for @mention support in post/comment creation
- Add VoteSegmentData and vote segment type for unified post creation API
- Update post and comment services to support segments in API requests
- Fix auth service to clear tokens before login/register
- Improve database initialization with proper close/retry logic
- Add verification check before allowing post creation
- Add metro web shims for react-native-webrtc full package and requireNativeComponent
- Update build config with git hash based version numbers

app.config.js

@@ -1,10 +1,21 @@
 const appJson = require('./app.json');
+const { execSync } = require('child_process');
 
 const isDevVariant = process.env.APP_VARIANT === 'dev';
 const releaseApiBaseUrl = 'https://withyou.littlelan.cn/api/v1';
 const releaseUpdatesBaseUrl = 'https://updates.littlelan.cn';
 const devApiBaseUrl = process.env.EXPO_PUBLIC_API_BASE_URL || 'http://192.168.31.238:8080/api/v1';
 
+function getGitShortHash() {
+  try {
+    return execSync('git rev-parse --short=4 HEAD', { encoding: 'utf-8' }).trim();
+  } catch {
+    return '0000';
+  }
+}
+
+const gitBuildSuffix = getGitShortHash();
+
 function toManifestUrl(baseUrl, portOverride) {
   const parsed = new URL(baseUrl);
   if (portOverride != null) {
@@ -58,10 +69,14 @@ module.exports = {
     checkAutomatically: 'ON_LOAD',
     fallbackToCacheTimeout: 0,
   },
-  ios: expo.ios,
+  ios: {
+    ...expo.ios,
+    buildNumber: gitBuildSuffix,
+  },
   android: {
     ...expo.android,
-    package: 'skin.carrot.bbs',
+    package: 'cn.qczlit.withyou',
+    versionCode: parseInt(gitBuildSuffix, 16),
   },
   // Web 端使用过滤后的插件
   plugins: filteredPlugins,