Stage 7 (wip): wire remaining ops (backend REST, FBS, gateway transcode) + real UI transport

backend: REST handlers for pass/exchange/resign/hint/evaluate/check_word/complaint/history/chat-list/nudge + new game.ListForAccount (my games) + seat display_name resolution
pkg/fbs: GameActionRequest/ExchangeRequest/EvalRequest/EvalResult/CheckWordRequest/WordCheckResult/ComplaintRequest/HintResult/History/GameList/ChatList + SeatView.display_name; committed Go regenerated (flatc 23.5.26)
gateway: 11 new transcode ops + backendclient methods + FB encoders
ui: edge TS codegen (flatc --ts + protoc-gen-es, committed), FlatBuffers<->model codec, real connect-web transport (binary, bearer auth, Subscribe). prod bundle ~69KB gzip JS

ui/package.json

@@ -10,11 +10,19 @@
     "build": "vite build",
     "preview": "vite preview",
     "check": "svelte-check --tsconfig ./tsconfig.json",
+    "codegen": "rm -rf src/gen && flatc --ts -o src/gen/fbs ../pkg/fbs/scrabble.fbs && buf generate ../gateway --template buf.gen.yaml",
     "test:unit": "vitest run",
     "test:watch": "vitest",
     "test:e2e": "playwright test"
   },
+  "dependencies": {
+    "@bufbuild/protobuf": "^2.12.0",
+    "@connectrpc/connect": "^2.1.0",
+    "@connectrpc/connect-web": "^2.1.0",
+    "flatbuffers": "^25.9.23"
+  },
   "devDependencies": {
+    "@bufbuild/protoc-gen-es": "^2.12.0",
     "@playwright/test": "^1.49.0",
     "@sveltejs/vite-plugin-svelte": "^5.0.0",
     "@types/node": "^22.10.0",