Add comprehensive user profile viewer with full accessibility support

- Create ProfileDialog with threaded loading and tabbed interface
- Display user bio, profile fields, stats, and recent posts
- Implement Follow/Unfollow, Block/Unblock, Mute/Unmute actions
- Add ActivityPub API methods for social actions and account management
- Enable keyboard navigation in read-only bio text with TextInteractionFlags
- Replace TODO profile viewing with fully functional dialog
- Update documentation to reflect completed profile features

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

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

src/main_window.py

@@ -18,6 +18,7 @@ from widgets.login_dialog import LoginDialog
 from widgets.account_selector import AccountSelector
 from widgets.settings_dialog import SettingsDialog
 from widgets.soundpack_manager_dialog import SoundpackManagerDialog
+from widgets.profile_dialog import ProfileDialog
 from activitypub.client import ActivityPubClient
 
 
@@ -632,8 +633,49 @@ class MainWindow(QMainWindow):
             
     def view_profile(self, post):
         """View user profile"""
-        # TODO: Implement profile viewing dialog
-        self.status_bar.showMessage(f"Profile viewing not implemented yet: {post.account.display_name}", 3000)
+        try:
+            # Convert Post.account to User-compatible data and open profile dialog
+            from models.user import User
+            
+            # Create User object from Account data
+            account = post.account
+            account_data = {
+                'id': account.id,
+                'username': account.username,
+                'acct': account.acct,
+                'display_name': account.display_name,
+                'note': account.note,
+                'url': account.url,
+                'avatar': account.avatar,
+                'avatar_static': account.avatar_static,
+                'header': account.header,
+                'header_static': account.header_static,
+                'locked': account.locked,
+                'bot': account.bot,
+                'discoverable': account.discoverable,
+                'group': account.group,
+                'created_at': account.created_at.isoformat() if account.created_at else None,
+                'followers_count': account.followers_count,
+                'following_count': account.following_count,
+                'statuses_count': account.statuses_count,
+                'fields': [],  # Will be loaded from API
+                'emojis': []   # Will be loaded from API
+            }
+            
+            user = User.from_api_dict(account_data)
+            
+            dialog = ProfileDialog(
+                user_id=user.id,
+                account_manager=self.account_manager,
+                sound_manager=self.timeline.sound_manager,
+                initial_user=user,
+                parent=self
+            )
+            dialog.exec()
+        except Exception as e:
+            self.status_bar.showMessage(f"Error opening profile: {str(e)}", 3000)
+            if hasattr(self.timeline, 'sound_manager'):
+                self.timeline.sound_manager.play_error()
         
     def update_status_label(self):
         """Update the status label with current account info"""