feat: peg AI inline suggestions to granular text spans, add autosave revision history with restore, fix focus mode, and make PS logo background transparent

apps/web/src/App.tsx

@@ -31,6 +31,7 @@ export default function App() {
   const [exportOpen, setExportOpen] = useState(false);
   const navCollapsed = useSettings((s) => s.navCollapsed);
   const aiSidebarOpen = useSettings((s) => s.aiSidebarOpen);
+  const focusMode = useSettings((s) => s.focusMode);
 
   useEffect(() => {
     const onKey = (e: KeyboardEvent) => {
@@ -44,7 +45,7 @@ export default function App() {
   }, []);
 
   return (
-    <div className={`ps-app${navCollapsed ? " is-nav-collapsed" : ""}${aiSidebarOpen ? " is-ai-open" : ""}`}>
+    <div className={`ps-app${navCollapsed ? " is-nav-collapsed" : ""}${aiSidebarOpen ? " is-ai-open" : ""}${focusMode ? " is-focus-mode" : ""}`}>
       <SplashScreen />
       <Sidebar nav={NAV} />
       <Topbar onOpenPalette={() => setPaletteOpen(true)} onOpenExport={() => setExportOpen(true)} />