feedback5: the public dev branch is marked as a development build (the owner's decision of 2026-10-06): version 0.2.0-dev (title footer, boot banner, /healthz), a README warning under the title (unstable, not for public servers, how to report, shared browser storage, no release zips), a visible 开发版 tag on the title screen (zh / en), a boot-banner warning for hosts, and tools/package.mjs refuses a dev version without --allow-dev; test/version.test.js checks all of it

shared/constants.js

@@ -5,7 +5,10 @@ import { N_ } from './i18n.js';
 export const PROTOCOL_VERSION = 1;
 /** Release version shown to players (title screen, server banner, /healthz). Kept equal to package.json "version"
  * (test/version.test.js); PROTOCOL_VERSION above is the separate wire-format number. */
-export const APP_VERSION = '0.1.4';
+export const APP_VERSION = '0.2.0-dev';
+/** A development build (the public `dev` branch): the title screen, the boot banner and the README say so, and
+ * tools/package.mjs refuses to build a release zip from it without --allow-dev. */
+export const DEV_BUILD = /-dev$/.test(APP_VERSION);
 
 export const MAX_SEATS = 4;
 /**