feat: implement relational lead origins with team assignments

- Dropped simple origins table in favor of origin_groups and origin_items to match the Funnels architecture.

- Added origin_group_id to teams table to assign specific origins to specific teams.

- Updated /admin/origins page to support creating origin groups, adding origin items to them, and assigning teams to groups.

- Updated Dashboard and UserDetail pages to dynamically load the exact origin items belonging to the active team/user.

types.ts

@@ -23,6 +23,20 @@ export interface FunnelDef {
   teamIds: string[];
 }
 
+export interface OriginItemDef {
+  id: string;
+  origin_group_id: string;
+  name: string;
+}
+
+export interface OriginGroupDef {
+  id: string;
+  tenant_id: string;
+  name: string;
+  items: OriginItemDef[];
+  teamIds: string[];
+}
+
 export interface User {
   id: string;
   tenant_id: string;
@@ -50,7 +64,7 @@ export interface Attendance {
   first_response_time_min: number;
   handling_time_min: number;
   funnel_stage: string;
-  origin: 'WhatsApp' | 'Instagram' | 'Website' | 'LinkedIn' | 'Indicação';
+  origin: string;
   product_requested: string;
   product_sold?: string;
   converted: boolean;