Add multiplayer transport regression coverage

tests/wiring.test.mjs

@@ -263,6 +263,31 @@ test('environment physics adds wind, soft island collision, turbulence, and proj
   assert.match(source, /windSpeed: this\.environmentWind\?\.strength/);
 });
 
+test('multiplayer transport uses Keycloak tickets and renders remote Sparrows without physics authority', async () => {
+  const [game, entry, multiplayer, pkg, server] = await Promise.all([
+    read('src/game-v4.js'),
+    read('src/game-entry.js'),
+    read('src/multiplayer.js'),
+    read('package.json'),
+    read('server/main.go'),
+  ]);
+
+  assert.match(entry, /import '.\/multiplayer\.js'/);
+  assert.match(pkg, /"keycloak-js"/);
+  assert.match(multiplayer, /clientId: 'airship-web'/);
+  assert.match(multiplayer, /\/api\/ws-ticket/);
+  assert.match(multiplayer, /Authorization:/);
+  assert.match(multiplayer, /new WebSocket/);
+  assert.match(game, /airship:multiplayer-snapshot/);
+  assert.match(game, /this\.remotePlayers = new Map\(\)/);
+  assert.match(game, /window\.airshipMultiplayer\?\.sendState/);
+  assert.match(game, /this\.add\.sprite\([\s\S]*?'player-airship'/);
+  assert.match(server, /CREATE TABLE IF NOT EXISTS player_profiles/);
+  assert.match(server, /a\.tickets\.consume/);
+  assert.match(server, /clampFloat\(msg\.X, 0, 3600\)/);
+  assert.match(server, /time\.NewTicker\(100 \* time\.Millisecond\)/);
+});
+
 test('mobile controls enter a dock hub before shipyard, trade, or missions', async () => {
   const [game, hud, index, entry, dockUi] = await Promise.all([
     read('src/game-v4.js'),