GPT-5.1 Codex AI Chat Assistant

Change summary: the home page now derives its featured example on the server and passes it into client blocks. Behavior impact: Hero, Features, and Gallery receive the same reviewed example without client components importing server-only modules. Why this approach: it preserves static rendering and keeps ownership boundaries clear. Verification: typecheck should confirm the prop contracts. Residual risk: page sampling is still needed to confirm the example rail looks right on mobile.

Symptom: URL changes but textarea state does not refresh. Likely stale state: query hydration runs only on first mount. Reproduction: click two prompt cards on the same model page. Minimal fix: observe search params and sync only when relevant values change. Test: direct load and same-page navigation both refill textarea.

Redirect loop risk: sign-in should not redirect to itself. Locale handling: preserve zh in return path. Protected route leak: studio content remains noindex and gated. Test case: unauthenticated localized studio request. Regression check: default locale and zh should behave consistently.

Source of truth: result_urls_json first item for old completed tasks. Dry run: count missing primary URL by status. Write order: old completed tasks only, batch by ID. Verification: compare counts before and after. Rollback limit: primary URL can be cleared only if original JSON remains intact.