refactor: split Finder into NameCard/Wishlist/AiControls + useOtmSession/useWishlist hooks + availability-client (v0.4.1)

Pure code motion; Finder.tsx 754 → 347 lines. No behavior change.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XStQKxPfEjrTvWo83KFCxG

package.json

@@ -1,6 +1,6 @@
 {
   "name": "names-poweredbyotm",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "private": true,
   "scripts": {
     "dev": "next dev --port 3000",