feat: add multi-strategy version fetchers, disable auto-fetch by default

- Add 4 version-fetch strategies (UpToDateCheck API, Store Page Scrape,
  Community Hub Scrape, Store API Heuristic) — no Steam API key needed
- Create orchestrator that tries all strategies, prefers named version
  over build ID
- Add test page at /test-version-fetchers for comparing strategies
- Add standalone /api/version-test endpoint (direct Steam App ID, no DB)
- Update /api/games/:id/steamdb-version to use new strategies
- Disable auto-fetch on submit page by default (NEXT_PUBLIC_VERSION_AUTO_FETCH=true to enable)
- SteamDB scraping blocked by Cloudflare; strategies preserved for later enablement

lib/api/app.ts

@@ -26,7 +26,8 @@ import {
 import { adminStorageRoutes } from "@/lib/api/admin-storage"
 import { adminAnalyticsRoutes } from "@/lib/api/admin-analytics"
 import { steamSearchRoutes } from "@/lib/api/steam-search"
-import { steamdbVersionRoutes } from "@/lib/api/steamdb-version"
+import { steamdbVersionRoutes, clientVersionRoutes } from "@/lib/api/steamdb-version"
+import { versionTestRoutes, standaloneVersionTestRoutes } from "@/lib/api/version-test"
 import { searchUnifiedRoutes } from "@/lib/api/search-unified"
 import { gameStubRoutes } from "@/lib/api/game-stub"
 import { gameStatsRoutes } from "@/lib/api/game-stats"
@@ -182,6 +183,8 @@ export const app = new Elysia({ prefix: "/api" })
       .use(gameStubRoutes)
       .use(steamgridProxyRoutes)
       .use(steamdbVersionRoutes)
+      .use(versionTestRoutes)
+      .use(standaloneVersionTestRoutes)
       .use(gamesManualRoutes)
       .use(screenshotRoutes)
       .use(mobileRoutes)
@@ -191,6 +194,7 @@ export const app = new Elysia({ prefix: "/api" })
     app
       .use(rateLimit("write"))
       .use(betterAuth)
+      .use(clientVersionRoutes)
       .use(performanceVerifyRoutes)
       .use(performanceSubmitRoutes)
       .use(commentsRoutes)