0.2.6-dev: WebSocket permessage-deflate for frames from 1 KB (no server context takeover, 2 KB server window, memLevel 7; a client offering a narrower window connects uncompressed) — host bandwidth layer 0.2; golden: unchanged

docs/design/overview.md

@@ -42,7 +42,8 @@ server/
   index.js                 process entry: startServer() wires server/http/ (plain node:http + ws); boots when run directly
   http/
     config.js              ROOT, served dirs, env (PORT, HOST, TRUST_PROXY, DEBUG), options handed to net.js / lobby.js
-    websocket.js           session wiring (SessionRegistry → Lobby → Network), WebSocket upgrade at /ws (64 KB frames)
+    websocket.js           session wiring (SessionRegistry → Lobby → Network), WebSocket upgrade at /ws (64 KB frames,
+                           permessage-deflate from 1 KB)
     static.js              mounts / → public, /data/, /shared/, /sim/ (.js only), the /data.js browser stand-in, path guards
     media.js               /media/… extension-less audio → public/assets/audio
     files.js               one file → response: MIME, gzip (.skel/.atlas/.json/.js/.css …), ETag / 304, cache policy, ranges