Sync launcher: stop phantom update prompt, forum News panel, hardware-aware render distance

Squashed sync from upstream. Highlights:
- Updater no longer reports already-applied deletes as a pending update on
  every launch (guard the del branch on the target still existing)
- Derive the packaged CSP image origin from the configured server URL
- Forum Announcements panel + News tab; hardware-aware farClip recommendation;
  parchment UI; localization and tweak updates
- Addon source refresh; schema and mod-state fixes

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/src/cache.ts

@@ -24,7 +24,12 @@ const skipFiles = new Set([
 	'.manifest-overrides.json'
 ]);
 
-const skipPatterns: RegExp[] = [/\.bak(\.|$)/, /\.crashing(\.|$)/];
+const skipPatterns: RegExp[] = [
+	/\.bak([.\-]|$)/,
+	/\.crashing(\.|$)/,
+	/\.torrent$/,
+	/^manifest\.json\./
+];
 const isSkipPattern = (file: string) => skipPatterns.some(p => p.test(file));
 
 const skipDirsPosix = new Set([