Fork Stalwart WebUI v1.0.11 as INBUXA Admin

- One edition: whatever edition the server reports, nothing is hidden or
  disabled as Enterprise-only (accountStore.setAccountInfo).
- INBUXA branding: name, logo (mark plus a text-colored wordmark), favicon,
  page titles, setup wizard text, and ihasmail's palette in light and dark.
- Two-factor setup names INBUXA as the issuer and drops the image parameter
  that made authenticator apps fetch a logo from a third-party site.
- Runs apart from the server: the server address can be set at deploy time
  with <meta name="api-base-url">, and OAuth endpoints the server returns as
  relative paths are resolved against the server's address, not the page's.
  Verified end to end against a separate inbuxa-server.
- Upstream's release workflow moved to .github-upstream so it never runs.

Upstream's history contains no Enterprise-only code, so this is an ordinary
fork. upstream is a fetch-only remote.

src/stores/accountStore.ts

@@ -23,8 +23,11 @@ export const useAccountStore = create<AccountState>()((set, get) => ({
   edition: 'community',
   locale: 'en',
 
-  setAccountInfo: (permissions, edition, locale) => {
-    set({ permissions, edition, locale });
+  setAccountInfo: (permissions, _edition, locale) => {
+    // INBUXA has one edition, with every feature. Whatever the server reports,
+    // nothing is hidden or disabled as Enterprise-only. Features the server
+    // hasn't rebuilt yet answer that for themselves.
+    set({ permissions, edition: 'enterprise', locale });
   },
 
   hasPermission: (perm) => {