Add edit feature enable/disable setting

- Added checkbox in Settings screen to enable/disable edit feature
- Setting stored in app_config.json as 'edit_feature_enabled'
- Edit workflow now validates: player setting, media type, server permission, card auth
- Shows appropriate error message when edit is blocked at any validation step
- Defaults to enabled (true) if not set
- All conditions must be met for edit interface to open

config/app_config.json

@@ -5,5 +5,6 @@
   "quickconnect_key": "8887779",
   "orientation": "Landscape",
   "touch": "True",
-  "max_resolution": "1920x1080"
+  "max_resolution": "1920x1080",
+  "edit_feature_enabled": true
 }

src/main.py

@@ -1078,6 +1078,7 @@ class SettingsPopup(Popup):
         self.ids.orientation_input.text = self.player.config.get('orientation', 'Landscape')
         self.ids.touch_input.text = self.player.config.get('touch', 'True')
         self.ids.resolution_input.text = self.player.config.get('max_resolution', 'auto')
+        self.ids.edit_enabled_checkbox.active = self.player.config.get('edit_feature_enabled', True)
         
         # Update status info
         self.ids.playlist_info.text = f'Playlist Version: {self.player.playlist_version}'
@@ -1118,6 +1119,12 @@ class SettingsPopup(Popup):
             Window.remove_widget(self.keyboard_widget)
             self.keyboard_widget = None
     
+    def on_edit_feature_toggle(self, is_active):
+        """Handle edit feature checkbox toggle"""
+        Logger.info(f"SettingsPopup: Edit feature {'enabled' if is_active else 'disabled'}")
+        # Update config immediately so it's available
+        self.player.config['edit_feature_enabled'] = is_active
+    
     def on_popup_dismiss(self, *args):
         """Handle popup dismissal - resume playback and restart cursor hide timer"""
         # Hide and remove keyboard
@@ -1224,6 +1231,7 @@ class SettingsPopup(Popup):
         self.player.config['orientation'] = self.ids.orientation_input.text
         self.player.config['touch'] = self.ids.touch_input.text
         self.player.config['max_resolution'] = self.ids.resolution_input.text
+        self.player.config['edit_feature_enabled'] = self.ids.edit_enabled_checkbox.active
         
         # Save to file
         self.player.save_config()
@@ -1838,12 +1846,23 @@ class SignagePlayer(Widget):
         Show edit interface for current image
         
         Workflow:
-        1. Validate media type (must be image)
+        1. Check if edit feature is enabled in settings
-        2. Check edit_on_player permission from server
+        2. Validate media type (must be image)
-        3. Prompt for card swipe (5 second timeout)
+        3. Check edit_on_player permission from server
-        4. Open edit interface with card data stored
+        4. Prompt for card swipe (5 second timeout)
-        5. When saved, card data is included in metadata and sent to server
+        5. Open edit interface with card data stored
+        6. When saved, card data is included in metadata and sent to server
         """
+        # Check 0: Verify edit feature is enabled in player settings
+        edit_feature_enabled = self.config.get('edit_feature_enabled', True)
+        if not edit_feature_enabled:
+            Logger.warning("SignagePlayer: Edit feature is disabled in settings")
+            # Show error message briefly
+            self.ids.status_label.text = 'Edit feature disabled - Enable in settings'
+            self.ids.status_label.opacity = 1
+            Clock.schedule_once(lambda dt: setattr(self.ids.status_label, 'opacity', 0), 2)
+            return
+        
         # Check if current media is an image
         if not self.playlist or self.current_index >= len(self.playlist):
             Logger.warning("SignagePlayer: No media to edit")

src/signage_player.kv

@@ -493,6 +493,36 @@
                 write_tab: False
                 on_touch_down: root.on_input_touch(self, args[1]) if self.collide_point(*args[1].pos) else None
         
+        # Edit Feature Enable/Disable
+        BoxLayout:
+            orientation: 'horizontal'
+            size_hint_y: None
+            height: dp(40)
+            spacing: dp(10)
+            
+            Label:
+                text: 'Enable Edit Feature:'
+                size_hint_x: 0.3
+                text_size: self.size
+                halign: 'left'
+                valign: 'middle'
+                
+            CheckBox:
+                id: edit_enabled_checkbox
+                size_hint_x: None
+                width: dp(40)
+                active: True
+                on_active: root.on_edit_feature_toggle(self.active)
+            
+            Label:
+                text: '(Allow editing images on this player)'
+                size_hint_x: 0.4
+                font_size: sp(12)
+                text_size: self.size
+                halign: 'left'
+                valign: 'middle'
+                color: 0.7, 0.7, 0.7, 1
+        
         Widget:
             size_hint_y: 0.05