refactor: flatten monorepo structure to backend/ frontend/ devops/

Rename subdirectories for a cleaner single-repo layout:
- website-monitoring-backend/  → backend/
- website-monitoring-frontend/ → frontend/
- website-monitoring-devops/   → devops/

Update all references in package.json scripts, CI workflows,
docker-compose, pre-commit hooks, and documentation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/database-fixes.sql

@@ -0,0 +1,80 @@
+-- Database Fixes for Website Monitoring Frontend
+-- Run this in your Supabase SQL editor to fix the console errors
+
+-- 1. Add missing columns to crawl_sessions table that the API expects
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS total_urls INTEGER DEFAULT 0;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS processed_urls INTEGER DEFAULT 0;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS progress_percentage INTEGER DEFAULT 0;
+
+-- 2. Ensure all required columns exist in crawl_sessions table
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS pages_discovered INTEGER DEFAULT 0;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS pages_processed INTEGER DEFAULT 0;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS current_url VARCHAR;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS error_message TEXT;
+ALTER TABLE crawl_sessions ADD COLUMN IF NOT EXISTS metadata JSONB DEFAULT '{}'::jsonb;
+
+-- 3. Add missing columns to users table if they don't exist
+ALTER TABLE users ADD COLUMN IF NOT EXISTS created_at TIMESTAMPTZ DEFAULT NOW();
+ALTER TABLE users ADD COLUMN IF NOT EXISTS last_login_at TIMESTAMPTZ;
+ALTER TABLE users ADD COLUMN IF NOT EXISTS role VARCHAR DEFAULT 'member';
+
+-- 4. Add missing columns to organizations table if they don't exist
+ALTER TABLE organizations ADD COLUMN IF NOT EXISTS api_key TEXT;
+ALTER TABLE organizations ADD COLUMN IF NOT EXISTS max_websites INTEGER DEFAULT 10;
+ALTER TABLE organizations ADD COLUMN IF NOT EXISTS max_scans_per_month INTEGER DEFAULT 1000;
+ALTER TABLE organizations ADD COLUMN IF NOT EXISTS subscription_status VARCHAR DEFAULT 'active';
+
+-- 5. Create indexes for better performance
+CREATE INDEX IF NOT EXISTS idx_crawl_sessions_status ON crawl_sessions(status);
+CREATE INDEX IF NOT EXISTS idx_crawl_sessions_website_status ON crawl_sessions(website_id, status);
+CREATE INDEX IF NOT EXISTS idx_users_organization_id ON users(organization_id);
+CREATE INDEX IF NOT EXISTS idx_websites_organization_id ON websites(organization_id);
+
+-- 6. Ensure RLS policies exist for crawl_sessions
+-- Enable RLS if not already enabled
+ALTER TABLE crawl_sessions ENABLE ROW LEVEL SECURITY;
+
+-- Create basic RLS policy for crawl_sessions if it doesn't exist
+DO $$
+BEGIN
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_policies 
+        WHERE tablename = 'crawl_sessions' 
+        AND policyname = 'Allow read for authenticated users'
+    ) THEN
+        CREATE POLICY "Allow read for authenticated users" ON crawl_sessions
+            FOR SELECT USING (true);
+    END IF;
+    
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_policies 
+        WHERE tablename = 'crawl_sessions' 
+        AND policyname = 'Allow insert for authenticated users'
+    ) THEN
+        CREATE POLICY "Allow insert for authenticated users" ON crawl_sessions
+            FOR INSERT WITH CHECK (true);
+    END IF;
+    
+    IF NOT EXISTS (
+        SELECT 1 FROM pg_policies 
+        WHERE tablename = 'crawl_sessions' 
+        AND policyname = 'Allow update for authenticated users'
+    ) THEN
+        CREATE POLICY "Allow update for authenticated users" ON crawl_sessions
+            FOR UPDATE USING (true);
+    END IF;
+END $$;
+
+-- 7. Refresh Supabase schema cache to pick up new columns
+-- This is important to resolve "Could not find column in schema cache" errors
+NOTIFY pgrst, 'reload schema';
+
+-- 8. Verify the fixes by checking table structure
+-- You can run these queries to verify the fixes worked:
+-- SELECT column_name, data_type, is_nullable, column_default 
+-- FROM information_schema.columns 
+-- WHERE table_name = 'crawl_sessions' 
+-- ORDER BY ordinal_position;
+
+COMMIT;
+