feat: implement secure multi-tenancy, RBAC, and premium dark mode

- Enforced tenant isolation and Role-Based Access Control across all API routes

- Implemented secure profile avatar upload using multer and UUIDs

- Redesigned UI with a premium "Onyx & Gold" Charcoal dark mode

- Added Funnel Stage and Origin filters to Dashboard and User Detail pages

- Replaced "Referral" with "Indicação" across the platform and database

- Optimized Dockerfile and local environment setup for reliable deployments

- Fixed frontend syntax errors and improved KPI/Chart visualizations

types.ts

@@ -31,7 +31,7 @@ export interface Attendance {
   first_response_time_min: number;
   handling_time_min: number;
   funnel_stage: FunnelStage;
-  origin: 'WhatsApp' | 'Instagram' | 'Website' | 'LinkedIn' | 'Referral';
+  origin: 'WhatsApp' | 'Instagram' | 'Website' | 'LinkedIn' | 'Indicação';
   product_requested: string;
   product_sold?: string;
   converted: boolean;
@@ -59,4 +59,6 @@ export interface DashboardFilter {
   dateRange: DateRange;
   userId?: string;
   teamId?: string;
+  funnelStage?: string;
+  origin?: string;
 }