feat: member portal Sprint 3 — profile edit form and privacy center

- PATCH /my/profile API endpoint (displayName, hometown, currentLocation, interests, language, digestPreference, directoryVisible)
- BFF PATCH /api/my/profile route
- ProfileForm client component: interest chips, digest preference, language, directory toggle
- Settings page rewrite: profile edit + privacy center (consent list + opt-out) + session + account delete

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/src/modules/my/my.controller.ts

@@ -1,4 +1,4 @@
-import { Body, Controller, Delete, Get, Param, Post } from '@nestjs/common';
+import { Body, Controller, Delete, Get, Param, Patch, Post } from '@nestjs/common';
 import { MyService } from './my.service';
 import { MemberAuth } from '../auth/member-auth.decorator';
 import { CurrentMember } from '../auth/current-member.decorator';
@@ -39,6 +39,19 @@ export class MyController {
     return this.service.getProfile(member.sub, member.tenantId);
   }
 
+  @Patch('profile')
+  updateProfile(@CurrentMember() member: MemberJwtPayload, @Body() body: {
+    displayName?: string;
+    hometown?: string;
+    currentLocation?: string;
+    interests?: string[];
+    language?: string;
+    digestPreference?: string;
+    directoryVisible?: boolean;
+  }) {
+    return this.service.updateProfile(member.sub, member.tenantId, body);
+  }
+
   @Get('groups')
   listGroups(@CurrentMember() member: MemberJwtPayload) {
     return this.service.listGroups(member.sub, member.tenantId);