Add configurable image overlay settings

Introduce configurable image overlay options and persist them. Added new state fields (image_width, image_offset, image_enabled) with defaults and wired them into the image overlay: the image display now respects the enabled flag, uses image_width for scaling and image_offset for placement. Extended the Settings dialog (resized, API field sizing) with a new Image tab containing enable checkbox, width and offset spinboxes, and included these values when saving. Updated config read/write to include an Image section so settings persist across runs and extended save_settings to accept image_width and image_offset. Minor import/order cleanup in image dialog.

src/utils/data/state.py

@@ -29,6 +29,9 @@ class AppState(QObject):
         self.interfaces: List = []
         self.active_interfaces: List = []
         self.bound_interface: Any = None
+        self.image_width: int = 300 # Default to 300px
+        self.image_offset: int = 50
+        self.image_enabled: bool = False
 
         # Trackers / Scraping
         self.posts: list[Dict[str,str]] | None = None  # titles, urls, author, seeders, leechers