use relative coordinates for masks & zones (#10912)

* Handle zones and masks as relative coords

* Ensure that zone coords are saved as relative

* Get motion mask working with relative coordinates

* Rewrite object mask to use relative coordinates as well

* Formatting

* Fix always trying to convert

* fix mask logic

frigate/api/app.py

@@ -137,7 +137,10 @@ def stats_history():
 
 @bp.route("/config")
 def config():
-    config = current_app.frigate_config.model_dump(mode="json", exclude_none=True)
+    config_obj: FrigateConfig = current_app.frigate_config
+    config: dict[str, dict[str, any]] = config_obj.model_dump(
+        mode="json", exclude_none=True
+    )
 
     # remove the mqtt password
     config["mqtt"].pop("password", None)
@@ -154,9 +157,13 @@ def config():
         for cmd in camera_dict["ffmpeg_cmds"]:
             cmd["cmd"] = clean_camera_user_pass(" ".join(cmd["cmd"]))
 
+        # ensure that zones are relative
+        for zone_name, zone in config_obj.cameras[camera_name].zones.items():
+            camera_dict["zones"][zone_name]["color"] = zone.color
+
     config["plus"] = {"enabled": current_app.plus_api.is_active()}
 
-    for detector, detector_config in config["detectors"].items():
+    for detector_config in config["detectors"].values():
         detector_config["model"]["labelmap"] = (
             current_app.frigate_config.model.merged_labelmap
         )