refactor(main.py): remove unused seeking state and update dependencies in pyproject.toml

croppa/main.py

@@ -9,7 +9,6 @@ import time
 import re
 import json
 
-
 class VideoEditor:
     # Configuration constants
     BASE_FRAME_DELAY_MS = 16  # ~60 FPS
@@ -90,8 +89,6 @@ class VideoEditor:
         self.window_height = 800
 
         # Seeking state
-        self.is_seeking = False
-        self.current_seek_key = None
         self.key_first_press_time = 0
         self.last_seek_time = 0
         
@@ -1225,7 +1222,7 @@ class VideoEditor:
         window_title = "Image Editor" if self.is_image_mode else "Video Editor"
         cv2.imshow(window_title, canvas)
 
-    def mouse_callback(self, event, x, y, flags, param):
+    def mouse_callback(self, event, x, y, flags, _):
         """Handle mouse events"""
         # Handle timeline interaction (not for images)
         if self.timeline_rect and not self.is_image_mode: