merge: ui2/t-discover

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Cxwgnn2pbzQ7rXv3rq7fei

# Conflicts:
#	packages/adapters/src/tmdb/index.ts

packages/contracts/src/api.ts

@@ -27,6 +27,7 @@ export {
   ReleaseIdentityResult,
   TaskAccepted,
 } from "./api/shared.ts";
+export * from "./discover.ts";
 export * from "./search.ts";
 
 // 所有 REST 端点的路径常量与请求/响应 schema 汇总,按领域分在 ./api/*.ts。