feat: game aliases + edit permissions + scoped game select (v0.3.6)

- Add aliases field to games (json array), searchable in game library and team session
- Add edit functionality inside GameDetailDialog (creator/owner/admin can modify)
- Add permission control for delete/edit buttons (only visible to authorized users)
- Scope GameSelectDialog to current group only
- Support aliases in import/export

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

backend/pb_migrations/1776942666_updated_games.js

@@ -0,0 +1,18 @@
+/// <reference path="../pb_data/types.d.ts" />
+migrate((db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("x5adjlc0txf16r8")
+
+  collection.listRule = "@request.auth.id != \"\" && group.members ~ @request.auth.id"
+  collection.viewRule = "@request.auth.id != \"\" && group.members ~ @request.auth.id"
+
+  return dao.saveCollection(collection)
+}, (db) => {
+  const dao = new Dao(db)
+  const collection = dao.findCollectionByNameOrId("x5adjlc0txf16r8")
+
+  collection.listRule = "group.owner = @request.auth.id || group.members.id = @request.auth.id"
+  collection.viewRule = "group.owner = @request.auth.id || group.members.id = @request.auth.id"
+
+  return dao.saveCollection(collection)
+})