Show the workspace credit balance in the topbar

Read from GET /organizations/me, refreshed after every action and every
30 seconds, since agents and schedules spend credits in the background.
The date is dropped from the topbar, and its items wrap on phones.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/i18n.ts

@@ -16,6 +16,7 @@ const en = {
   'layout.breadcrumb': 'Workspace',
   'layout.signOut': 'Sign out',
   'layout.engine': 'learning-lab engine',
+  'layout.creditsTitle': 'Workspace credit balance',
   'layout.devStrip': 'Development phase: connected to the learning-lab engine. Review AI output before using it.',
   'layout.footer': 'A workspace for knowledge that keeps growing.',
   'layout.mainNav': 'Main navigation',
@@ -397,6 +398,7 @@ const id: Record<Key, string> = {
   'layout.breadcrumb': 'Ruang kerja',
   'layout.signOut': 'Keluar',
   'layout.engine': 'Engine learning-lab',
+  'layout.creditsTitle': 'Saldo kredit workspace',
   'layout.devStrip': 'Fase development: terhubung ke engine learning-lab. Hasil AI perlu ditinjau sebelum dipakai.',
   'layout.footer': 'Ruang kerja untuk pengetahuan yang terus berkembang.',
   'layout.mainNav': 'Navigasi utama',