Rename Brain and AI to Instruction and write BAWANA in capitals

The page now lives at /instruction; /brain and /perintah redirect there.

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

src/components/AppLayout.tsx

@@ -18,7 +18,7 @@ export const NAV_GROUPS: { label: Key; items: { to: string; label: Key; icon: Ic
     label: 'nav.settings',
     items: [
       { to: '/upload', label: 'nav.brain', icon: 'brain' },
-      { to: '/brain', label: 'nav.instruction', icon: 'spark' },
+      { to: '/instruction', label: 'nav.instruction', icon: 'spark' },
       { to: '/schedule', label: 'nav.schedule', icon: 'calendar' },
       { to: '/results', label: 'nav.results', icon: 'layers' },
     ],
@@ -207,7 +207,7 @@ export function AppLayout() {
         </header>
         {/* Keyed by route so each page plays the fade-in from theme.css. */}
         <main tabIndex={-1} key={pathname}><Outlet /></main>
-        <footer className="app-footer">Learning Lab Express <span>by Bawana</span><span>{t('layout.footer')}</span></footer>
+        <footer className="app-footer">Learning Lab Express <span>by BAWANA</span><span>{t('layout.footer')}</span></footer>
       </div>
       {help && <HelpDialog onClose={() => setHelp(false)} />}
       <Toaster />

src/components/Icon.tsx

@@ -54,7 +54,7 @@ export function Brand() {
   return (
     <span className="brand">
       <span className="brand-mark"><Icon name="book" /></span>
-      <span>Learning Lab <b>Express</b><small>by Bawana</small></span>
+      <span>Learning Lab <b>Express</b><small>by BAWANA</small></span>
     </span>
   )
 }