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/voice/VoiceFloatingButton.tsx

@@ -173,11 +173,12 @@ export function VoiceFloatingButton() {
     const childId = children[0].id;
     console.log('[Voice] Using child ID:', childId);
 
-    // Create the activity
+    // Create the activity - match backend CreateActivityDto format
     const activityData = {
       type: activityType,
-      timestamp: activityTimestamp || new Date().toISOString(),
-      data: activityDetails,
+      startedAt: activityTimestamp ? new Date(activityTimestamp).toISOString() : new Date().toISOString(),
+      endedAt: activityDetails.endedAt || undefined,
+      metadata: activityDetails,
       notes: activityDetails.notes || undefined,
     };
 
@@ -213,6 +214,7 @@ export function VoiceFloatingButton() {
   const handleApprove = async (data: any) => {
     try {
       setIsProcessing(true);
+      setIdentifiedActivity(data.type); // Set the activity type for display
       setProcessingStatus('saving');
       setShowReview(false);
 
@@ -249,6 +251,7 @@ export function VoiceFloatingButton() {
   const handleEdit = async (editedData: any) => {
     try {
       setIsProcessing(true);
+      setIdentifiedActivity(editedData.type); // Set the activity type for display
       setProcessingStatus('saving');
       setShowReview(false);