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>

src/main/api/root.ts

@@ -6,6 +6,7 @@ import { patcherRouter } from './routers/patcher';
 import { generalRouter } from './routers/general';
 import { preferencesRouter } from './routers/preferences';
 import { newsRouter } from './routers/news';
+import { forumRouter } from './routers/forum';
 import { modsRouter } from './routers/mods';
 import { selfUpdaterRouter } from './routers/selfUpdater';
 
@@ -17,6 +18,7 @@ export const appRouter = createTRPCRouter({
 	patcher: patcherRouter,
 	updater: updaterRouter,
 	news: newsRouter,
+	forum: forumRouter,
 	mods: modsRouter,
 	selfUpdater: selfUpdaterRouter
 });