Two phones, one match: the shot is the message, the receiver is the judge

VS A FRIEND on the mode screen (host a code, join a code), a ~110-line
RFC6455 relay in server.py that holds no game state, and src/net.js: each
phone plays itself near-side and the opponent's court is this one rotated
half a turn about the net. The phone a ball flies toward makes every call
on it; the striker's copy is picture. Six tests pin the rule from both
seats. No reconnect yet — a dropped radio is a card and a reload.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/state.js

@@ -53,6 +53,7 @@ export const G = {
   idleT: 0,
   boy: null,          // ball boy sprinting across: {x, z, dir, runT}
   aiServeT: 0,
+  net: null,          // netplay (src/net.js): { ready, dead, side, code, opp } while a 1v1 runs
   aiSwingCool: 0,
   aiReactT: 9,        // time since the player's last hit; CPU reads the shot after TUNE.aiReaction
   wasServe: false,    // the ball in flight is a serve (first bounce must hit the box)