fix: brainstorm infinite loop, ghost cursor, embedding ::vector cast, semantic search, billing stats, usage meter accordion

- Fix useBrainstormSocket: stable guestId via useRef, remove setState in cleanup
- Fix GhostCursor: direct DOM manipulation via refs, no useState re-renders
- Fix all SQL embedding queries: add ::vector cast on text columns
- Fix embedding truncation to 15000 chars (under 8192 token limit)
- Fix NoteEmbedding INSERT: remove non-existent updatedAt column
- Fix billing page: show all quota stats in grid instead of single metric
- Fix usage meter: accordion expand/collapse, per-feature detail
- Fix semantic search: rebuild 103 note embeddings, ::vector cast on vectorSearch
- Fix brainstorm expand/manual-idea/create: ::vector cast on embedding SQL

memento-note/auth.config.ts

@@ -14,7 +14,7 @@ export const authConfig = {
     authorized({ auth, request: { nextUrl } }) {
       const isLoggedIn = !!auth?.user;
       const isAdmin = (auth?.user as any)?.role === 'ADMIN';
-      const isDashboardPage = nextUrl.pathname === '/' ||
+      const isDashboardPage = nextUrl.pathname === '/home' ||
                              nextUrl.pathname.startsWith('/reminders') ||
                              nextUrl.pathname.startsWith('/archive') ||
                              nextUrl.pathname.startsWith('/trash') ||
@@ -24,8 +24,14 @@ export const authConfig = {
                              nextUrl.pathname.startsWith('/chat') ||
                              nextUrl.pathname.startsWith('/canvas') ||
                              nextUrl.pathname.startsWith('/notebooks') ||
-                             nextUrl.pathname.startsWith('/note/');
+                             nextUrl.pathname.startsWith('/note/') ||
+                             nextUrl.pathname.startsWith('/brainstorm');
       const isAdminPage = nextUrl.pathname.startsWith('/admin');
+      const isPublicPage = nextUrl.pathname === '/' ||
+                          nextUrl.pathname === '/login' ||
+                          nextUrl.pathname === '/register' ||
+                          nextUrl.pathname === '/forgot-password' ||
+                          nextUrl.pathname.startsWith('/reset-password');
 
       if (isAdminPage) {
         return isLoggedIn && isAdmin;
@@ -34,9 +40,12 @@ export const authConfig = {
       if (isDashboardPage) {
         if (isLoggedIn) return true;
         return false;
-      } else if (isLoggedIn && (nextUrl.pathname === '/login' || nextUrl.pathname === '/register')) {
-        return Response.redirect(new URL('/', nextUrl));
       }
+
+      if (isLoggedIn && (nextUrl.pathname === '/login' || nextUrl.pathname === '/register')) {
+        return Response.redirect(new URL('/home', nextUrl));
+      }
+
       return true;
     },
     async jwt({ token, user }) {