Add Lead CRM API with Supabase

supabase-leads.sql

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+-- Leads Table for Supabase
+-- Run in SQL Editor
+
+CREATE TABLE IF NOT EXISTS leads (
+  id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
+  user_id TEXT DEFAULT 'default',
+  name TEXT NOT NULL,
+  business_name TEXT,
+  phone TEXT,
+  email TEXT,
+  source TEXT,
+  status TEXT DEFAULT 'new' CHECK (status IN ('new', 'contacted', 'qualified', 'won', 'lost')),
+  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
+ALTER TABLE leads DISABLE ROW LEVEL SECURITY;