Fix leads API null handling

supabase-leads.sql

@@ -1,6 +1,4 @@
--- Leads Table for Supabase
--- Run in SQL Editor
-
+-- Create leads table
 CREATE TABLE IF NOT EXISTS leads (
   id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
   user_id TEXT DEFAULT 'default',
@@ -9,19 +7,16 @@ CREATE TABLE IF NOT EXISTS leads (
   phone TEXT,
   email TEXT,
   source TEXT,
-  status TEXT DEFAULT 'new' CHECK (status IN ('new', 'contacted', 'qualified', 'won', 'lost')),
+  status TEXT DEFAULT 'new',
   notes TEXT,
   created_at TIMESTAMPTZ DEFAULT NOW()
 );
 
-CREATE INDEX IF NOT EXISTS idx_leads_user ON leads(user_id);
-CREATE INDEX IF NOT EXISTS idx_leads_status ON leads(status);
-
--- Sample leads
-INSERT INTO leads (name, business_name, phone, status, source) VALUES
-('Juan García', 'Restaurante La Niña', '+34 952 449 193', 'new', 'cold_call'),
-('María López', 'Clínica Dental Málaga', '+34 951 123 456', 'contacted', 'website'),
-('Carlos Ruiz', 'Inmobiliaria Costa', '+34 600 123 456', 'qualified', 'referral');
-
--- Disable RLS for now
+-- Disable RLS
 ALTER TABLE leads DISABLE ROW LEVEL SECURITY;
+
+-- Add sample leads
+INSERT INTO leads (name, business_name, phone, status, source) VALUES
+('Juan', 'Restaurante La Niña', '+34 952 449 193', 'new', 'cold_call'),
+('Maria', 'Restaurante Trocadero', '+34 681 142 944', 'new', 'cold_call'),
+('Carlos', 'Restaurant No7', '+34 655 036 827', 'new', 'cold_call');