diff --git a/engine.py b/engine.py
index f172290..e2739cf 100644
--- a/engine.py
+++ b/engine.py
@@ -1,19 +1,20 @@
 import os
 import shutil
+import json
 from PIL import Image
 from io import BytesIO
 
 class SorterEngine:
+    CONFIG_PATH = "/app/favorites.json"
+
     @staticmethod
     def get_images(path):
-        """Returns list of image files in a directory."""
         exts = ('.jpg', '.jpeg', '.png', '.webp', '.bmp', '.tiff')
         if not path or not os.path.exists(path): return []
         return sorted([f for f in os.listdir(path) if f.lower().endswith(exts)])
 
     @staticmethod
     def get_id_mapping(path):
-        """Maps idXXX prefixes to full filenames for Tab 1."""
         mapping = {}
         for f in SorterEngine.get_images(path):
             if f.startswith("id") and "_" in f:
@@ -23,68 +24,52 @@ class SorterEngine:
 
     @staticmethod
     def get_max_id_number(folder_path):
-        """Finds the highest idXXX_ prefix in a folder to calculate the next ID."""
         max_id = 0
-        if not folder_path or not os.path.exists(folder_path):
-            return 0
+        if not folder_path or not os.path.exists(folder_path): return 0
         for f in os.listdir(folder_path):
             if f.startswith("id") and "_" in f:
                 try:
                     num_part = f[2:].split('_')[0]
                     num = int(num_part)
                     if num > max_id: max_id = num
-                except (ValueError, IndexError):
-                    continue
+                except: continue
         return max_id
 
     @staticmethod
     def compress_for_web(path, quality):
-        """Reduces image size for browser display to save bandwidth."""
         try:
             with Image.open(path) as img:
                 buf = BytesIO()
                 img.convert("RGB").save(buf, format="JPEG", quality=quality)
                 return buf
-        except Exception:
-            return None
+        except: return None
 
     @staticmethod
     def execute_move(t_path, c_path, t_folder, c_folder, prefix, mode="standard"):
-        """
-        Moves/Renames files based on the script's logic:
-        - standard: selected_target / selected_control
-        - solo: selected_target_solo_woman / control_selected_solo_woman
-        """
         t_fname = f"{prefix}{os.path.basename(t_path)}"
         c_fname = f"{prefix}{os.path.basename(c_path)}"
-        
         subdirs = {
             "standard": ("selected_target", "selected_control"),
             "solo": ("selected_target_solo_woman", "control_selected_solo_woman")
         }
-        
         t_sub, c_sub = subdirs[mode]
-        t_dst = os.path.join(t_folder, t_sub, t_fname)
-        c_dst = os.path.join(c_folder, c_sub, c_fname)
-        
+        t_dst, c_dst = os.path.join(t_folder, t_sub, t_fname), os.path.join(c_folder, c_sub, c_fname)
         os.makedirs(os.path.dirname(t_dst), exist_ok=True)
         os.makedirs(os.path.dirname(c_dst), exist_ok=True)
-        
         shutil.move(t_path, t_dst)
-        shutil.copy2(c_path, c_dst) # Copy control as per script logic
-        
+        shutil.copy2(c_path, c_dst)
         return t_dst, c_dst
 
     @staticmethod
-    def revert_action(action):
-        """Reverses the last recorded action from the history stack."""
-        if action['type'] in ['link_standard', 'link_solo']:
-            if os.path.exists(action['t_dst']):
-                shutil.move(action['t_dst'], action['t_src'])
-            if os.path.exists(action['c_dst']):
-                os.remove(action['c_dst'])
-        elif action['type'] == 'unused':
-            if os.path.exists(action['t_dst']):
-                shutil.move(action['t_dst'], action['t_src'])
-            if os.path.exists(action['c_dst']):
-                shutil.move(action['c_dst'], action['c_src'])
\ No newline at end of file
+    def save_favorite(name, path_t, path_c):
+        favs = SorterEngine.load_favorites()
+        favs[name] = {"target": path_t, "control": path_c}
+        with open(SorterEngine.CONFIG_PATH, 'w') as f:
+            json.dump(favs, f)
+
+    @staticmethod
+    def load_favorites():
+        if os.path.exists(SorterEngine.CONFIG_PATH):
+            with open(SorterEngine.CONFIG_PATH, 'r') as f:
+                return json.load(f)
+        return {}
\ No newline at end of file