refactor: redesign planos interface with design system patterns

- Create CreatePlanModal component with Headless UI Dialog
- Implement dark mode support throughout plans UI
- Update plans/page.tsx with professional card layout
- Update plans/[id]/page.tsx with consistent styling
- Add proper spacing, typography, and color consistency
- Implement smooth animations and transitions
- Add success/error message feedback
- Improve form UX with better input styling

postgres/migrations/009_create_plans_table.sql

@@ -0,0 +1,25 @@
+-- Create plans table
+CREATE TABLE IF NOT EXISTS plans (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    name VARCHAR(255) NOT NULL,
+    slug VARCHAR(100) NOT NULL UNIQUE,
+    description TEXT,
+    min_users INTEGER NOT NULL DEFAULT 1,
+    max_users INTEGER NOT NULL DEFAULT 30, -- -1 means unlimited
+    monthly_price NUMERIC(10, 2),
+    annual_price NUMERIC(10, 2),
+    features TEXT[] NOT NULL DEFAULT '{}',
+    differentiators TEXT[] NOT NULL DEFAULT '{}',
+    storage_gb INTEGER NOT NULL DEFAULT 1,
+    is_active BOOLEAN NOT NULL DEFAULT true,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Add indexes
+CREATE INDEX idx_plans_slug ON plans(slug);
+CREATE INDEX idx_plans_is_active ON plans(is_active);
+
+-- Add comments
+COMMENT ON TABLE plans IS 'Subscription plans for agencies';
+COMMENT ON COLUMN plans.max_users IS '-1 means unlimited users';

postgres/migrations/010_create_agency_subscriptions_table.sql

@@ -0,0 +1,24 @@
+-- Create agency_subscriptions table
+CREATE TABLE IF NOT EXISTS agency_subscriptions (
+    id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    agency_id UUID NOT NULL REFERENCES tenants(id) ON DELETE CASCADE,
+    plan_id UUID NOT NULL REFERENCES plans(id) ON DELETE RESTRICT,
+    billing_type VARCHAR(20) NOT NULL DEFAULT 'monthly', -- monthly or annual
+    current_users INTEGER NOT NULL DEFAULT 0,
+    status VARCHAR(50) NOT NULL DEFAULT 'active', -- active, suspended, cancelled
+    start_date TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    renewal_date TIMESTAMP NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(agency_id) -- One active subscription per agency
+);
+
+-- Add indexes
+CREATE INDEX idx_agency_subscriptions_agency_id ON agency_subscriptions(agency_id);
+CREATE INDEX idx_agency_subscriptions_plan_id ON agency_subscriptions(plan_id);
+CREATE INDEX idx_agency_subscriptions_status ON agency_subscriptions(status);
+
+-- Add comments
+COMMENT ON TABLE agency_subscriptions IS 'Tracks agency subscription to plans';
+COMMENT ON COLUMN agency_subscriptions.billing_type IS 'Monthly or annual billing';
+COMMENT ON COLUMN agency_subscriptions.current_users IS 'Current count of users (collaborators + clients)';

postgres/migrations/011_seed_default_plans.sql

@@ -0,0 +1,68 @@
+-- Seed the default plans
+INSERT INTO plans (id, name, slug, description, min_users, max_users, monthly_price, annual_price, features, differentiators, storage_gb, is_active, created_at, updated_at)
+VALUES 
+    (
+        gen_random_uuid(),
+        'Ignição',
+        'ignition',
+        'Ideal para pequenas agências iniciantes',
+        1,
+        30,
+        199.99,
+        1919.90,
+        ARRAY['CRM', 'ERP', 'Projetos', 'Helpdesk', 'Pagamentos', 'Contratos', 'Documentos'],
+        ARRAY[]::text[],
+        1,
+        true,
+        CURRENT_TIMESTAMP,
+        CURRENT_TIMESTAMP
+    ),
+    (
+        gen_random_uuid(),
+        'Órbita',
+        'orbit',
+        'Para agências em crescimento',
+        31,
+        100,
+        399.99,
+        3839.90,
+        ARRAY['CRM', 'ERP', 'Projetos', 'Helpdesk', 'Pagamentos', 'Contratos', 'Documentos'],
+        ARRAY['Suporte prioritário'],
+        1,
+        true,
+        CURRENT_TIMESTAMP,
+        CURRENT_TIMESTAMP
+    ),
+    (
+        gen_random_uuid(),
+        'Cosmos',
+        'cosmos',
+        'Para agências consolidadas',
+        101,
+        300,
+        799.99,
+        7679.90,
+        ARRAY['CRM', 'ERP', 'Projetos', 'Helpdesk', 'Pagamentos', 'Contratos', 'Documentos'],
+        ARRAY['Gerente de conta dedicado', 'API integrações'],
+        1,
+        true,
+        CURRENT_TIMESTAMP,
+        CURRENT_TIMESTAMP
+    ),
+    (
+        gen_random_uuid(),
+        'Enterprise',
+        'enterprise',
+        'Solução customizada para grandes agências',
+        301,
+        -1,
+        NULL,
+        NULL,
+        ARRAY['CRM', 'ERP', 'Projetos', 'Helpdesk', 'Pagamentos', 'Contratos', 'Documentos'],
+        ARRAY['Armazenamento customizado', 'Treinamento personalizado'],
+        1,
+        true,
+        CURRENT_TIMESTAMP,
+        CURRENT_TIMESTAMP
+    )
+ON CONFLICT DO NOTHING;