Name each install, fix the notification badge, switch to Archivo

- Settings > General: an App name (super admin) for the installed app.
  The manifest's name/short_name, the iOS head tags and the loading
  page's title use it, so two installs on one phone can be told apart.
- Notifications get a real badge (white stone silhouette): Android masks
  the badge by alpha, so the opaque app icon showed as a square.
- The loading and offline pages load the app's font.
- The font is now Archivo (variable, one request for every weight),
  matching the marketing site.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/pages/admin/settings/general/index.tsx

@@ -1,4 +1,5 @@
 import AppearanceSection from "./(sections)/appearance-section";
+import InstallNameSection from "./(sections)/install-name-section";
 import NotificationsSection from "./(sections)/notifications-section";
 import PromptSection from "./(sections)/prompt-section";
 import RunLimitsSection from "./(sections)/run-limits-section";
@@ -15,6 +16,7 @@ export default function AdminSettingsGeneralPage() {
             description="How the app looks and behaves."
         >
             <AppearanceSection />
+            <InstallNameSection />
             <NotificationsSection />
             <PromptSection />
             <RunLimitsSection />