Add BMAD framework, authentication, and new features

keep-notes/hooks/use-reminder-check.ts

@@ -0,0 +1,45 @@
+'use client';
+
+import { useState, useEffect } from 'react';
+import { Note } from '@/lib/types';
+import { useToast } from '@/components/ui/toast';
+
+export function useReminderCheck(notes: Note[]) {
+  const [notifiedReminders, setNotifiedReminders] = useState<Set<string>>(new Set());
+  const { addToast } = useToast();
+
+  useEffect(() => {
+    const checkReminders = () => {
+      const now = new Date();
+      
+      notes.forEach(note => {
+        if (!note.reminder) return;
+        
+        const reminderDate = new Date(note.reminder);
+        
+        // Check if reminder is due (within last minute or future)
+        // We only notify if it's due now or just passed, not old overdue ones (unless we want to catch up)
+        // Let's say: notify if reminder time is passed AND we haven't notified yet.
+        
+        if (reminderDate <= now && !notifiedReminders.has(note.id)) {
+          // Play sound (optional)
+          // const audio = new Audio('/notification.mp3');
+          // audio.play().catch(e => console.log('Audio play failed', e));
+
+          addToast("🔔 Reminder: " + (note.title || "Untitled Note"), "info");
+
+          // Mark as notified in local state
+          setNotifiedReminders(prev => new Set(prev).add(note.id));
+        }
+      });
+    };
+
+    // Check immediately
+    checkReminders();
+
+    // Then check every 30 seconds
+    const interval = setInterval(checkReminders, 30000);
+
+    return () => clearInterval(interval);
+  }, [notes, notifiedReminders, addToast]);
+}