feedback7: version 0.2.2-dev — 0.2.1 is released; the dev line is marked as before (README warning under the title, an orange dev badge, the 开发版 tag on the title screen, the boot-banner warning)

- Tests: version, i18n-packs, docs-consistency, package.

shared/constants.js

@@ -5,7 +5,7 @@ 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 = '0.2.1';
+export const APP_VERSION = '0.2.2-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);