v5.0.0: protocol v5 and the browser frontend

Protocol v5 replaces newline lines with bounded [u32 len][text] frames and REQ/RES/EVT envelopes. Requests carry correlation ids and the server replays the last 256 replies per connection, so a gateway retry cannot double-debit and a late reply cannot clobber a newer request. HELLO/PONG carry server time; crash rounds announce started_at and push coalesced 10 Hz ticks. Crash now commits sha256(seed) before a round and reveals the seed when it ends, so clients recompute the crash point.

Adds the webd/ gateway: one blocking thread, one ClientCore and one pinned upstream TLS connection per session, an HttpOnly session cookie, takeover, and a 60-second grace window. The browser sends Command JSON and renders View JSON; it never speaks the game protocol or stores credentials.

Adds the vanilla TypeScript browser app at /play/ (login, lobby, all four games, history, notices, crash verification), the nginx /play and /ws routes, and the headless DOM smoke test. webd and the app stay out of the TUI/GUI/server build graph.

The client/server version moves to 5.0.0 in lockstep; v4 peers are refused at HELLO.

1 files changed, 20 insertions, 0 deletions

diff --git a/web/play/package.json b/web/play/package.json
new file mode 100644
index 0000000..3e3cebf
--- /dev/null
+++ b/web/play/package.json
@@ -0,0 +1,20 @@
+{
+  "name": "zagan-bet-play",
+  "private": true,
+  "version": "5.0.0",
+  "type": "module",
+  "scripts": {
+    "build": "node build.mjs",
+    "watch": "node build.mjs --watch",
+    "typecheck": "tsc --noEmit",
+    "test": "node test/smoke.mjs"
+  },
+  "devDependencies": {
+    "esbuild": "^0.28.0",
+    "jsdom": "^30.1.3",
+    "typescript": "^5.9.0"
+  },
+  "engines": {
+    "node": ">=20"
+  }
+}