Implement editing users management and permission updates

- Added auto-creation of PlayerUser records from player metadata (user_card_data)
- Fixed player_user table schema (removed player_id, made user_code unique globally)
- Created admin page for managing editing users (view, update names, delete)
- Updated permissions: normal users can now access admin panel, editing users, and leftover media
- Admin-only access: user management, system dependencies, logo customization
- Fixed edited media workflow to preserve original files
- Content.filename now points to edited_media folder, keeping originals intact
- Added user display names in edited media page (shows name if set, code otherwise)
- Fixed leftover media file size calculation (handle None values)
- Split editing users into separate card on admin panel with description

app/blueprints/players.py

@@ -343,6 +343,7 @@ def edited_media(player_id: int):
         
         # Get all edited media history from player
         from app.models.player_edit import PlayerEdit
+        from app.models.player_user import PlayerUser
         
         edited_media = PlayerEdit.query.filter_by(player_id=player_id)\
             .order_by(PlayerEdit.created_at.desc())\
@@ -356,10 +357,21 @@ def edited_media(player_id: int):
                 if content:
                     content_files[edit.content_id] = content
         
+        # Get user mappings for display names
+        user_mappings = {}
+        for edit in edited_media:
+            if edit.user and edit.user not in user_mappings:
+                player_user = PlayerUser.query.filter_by(user_code=edit.user).first()
+                if player_user:
+                    user_mappings[edit.user] = player_user.user_name or edit.user
+                else:
+                    user_mappings[edit.user] = edit.user
+        
         return render_template('players/edited_media.html',
                              player=player,
                              edited_media=edited_media,
-                             content_files=content_files)
+                             content_files=content_files,
+                             user_mappings=user_mappings)
     except Exception as e:
         log_action('error', f'Error loading edited media for player {player_id}: {str(e)}')
         flash('Error loading edited media.', 'danger')