fix: Fix 3 critical bugs - voice tracking, session persistence, and status updates

BUG-1: Voice tracking not saving activities
- Fix activity data format to match backend CreateActivityDto
- Change 'timestamp' to 'startedAt' and 'data' to 'metadata'
- Remove duplicate voice button from mobile TabBar

BUG-2: Session persistence after revocation
- Add logout() call when revoking all sessions
- Add logout() call when removing all devices
- Ensures user is logged out after session/device revocation
- Clears tokens and redirects to login

BUG-3: Voice modal status not updating
- Set identifiedActivity before saving to show tracker name
- Display "Adding to [tracker] tracker..." during save
- Improves UX by showing which tracker is being updated

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

maternal-web/components/settings/SessionsManagement.tsx

@@ -32,9 +32,11 @@ import {
 import { sessionsApi, type SessionInfo } from '@/lib/api/sessions';
 import { motion } from 'framer-motion';
 import { useLocalizedDate } from '@/hooks/useLocalizedDate';
+import { useAuth } from '@/lib/auth/AuthContext';
 
 export function SessionsManagement() {
   const { formatDistanceToNow } = useLocalizedDate();
+  const { logout } = useAuth();
   const [sessions, setSessions] = useState<SessionInfo[]>([]);
   const [isLoading, setIsLoading] = useState(true);
   const [error, setError] = useState<string | null>(null);
@@ -91,13 +93,16 @@ export function SessionsManagement() {
       const response = await sessionsApi.revokeAllSessions();
       setSuccessMessage(`${response.revokedCount} session(s) revoked successfully`);
       setRevokeAllDialogOpen(false);
-      await loadSessions();
+
+      // Logout the current user since all sessions are revoked
+      // This clears tokens and redirects to login
+      await logout();
     } catch (err: any) {
       console.error('Failed to revoke all sessions:', err);
       setError(err.response?.data?.message || 'Failed to revoke sessions');
-    } finally {
       setIsRevokingAll(false);
     }
+    // Note: Don't set isRevokingAll to false here, as we're logging out
   };
 
   const getPlatformIcon = (platform?: string) => {