fix: re-enable boot sequence after redesign

Changed initial phase from 'pmr' back to 'boot' to restore the
full boot → login → dashboard flow for production.

src/App.tsx

@@ -44,7 +44,7 @@ function SkipButton({ onSkip }: { onSkip: () => void }) {
 }
 
 function App() {
-  const [phase, setPhase] = useState<Phase>('pmr')
+  const [phase, setPhase] = useState<Phase>('boot')
 
   useEffect(() => {
     initModel()