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, 22 insertions, 0 deletions

diff --git a/web/play/build.mjs b/web/play/build.mjs
new file mode 100644
index 0000000..40af074
--- /dev/null
+++ b/web/play/build.mjs
@@ -0,0 +1,22 @@
+import { build, context } from "esbuild";
+
+const watch = process.argv.includes("--watch");
+
+const options = {
+  entryPoints: ["src/main.ts"],
+  bundle: true,
+  outfile: "app.js",
+  format: "iife",
+  target: ["es2020"],
+  minify: !watch,
+  sourcemap: watch ? "inline" : false,
+  charset: "utf8",
+  logLevel: "info",
+};
+
+if (watch) {
+  const ctx = await context(options);
+  await ctx.watch();
+} else {
+  await build(options);
+}