feat(example-images): add NSFW level setting endpoint

Add new POST endpoint `/api/lm/example-images/set-nsfw-level` to allow updating NSFW classification for individual example images. The endpoint supports both regular and custom images, validates required parameters, and updates the corresponding model metadata. This enables users to manually adjust NSFW ratings for better content filtering.

tests/routes/test_example_images_route_registrar_handlers.py

@@ -91,11 +91,16 @@ class StubImportUseCase:
 class StubProcessor:
     def __init__(self) -> None:
         self.delete_calls: list[web.Request] = []
+        self.nsfw_calls: list[web.Request] = []
 
     async def delete_custom_image(self, request: web.Request) -> web.Response:
         self.delete_calls.append(request)
         return web.json_response({"deleted": True})
 
+    async def set_example_image_nsfw_level(self, request: web.Request) -> web.Response:
+        self.nsfw_calls.append(request)
+        return web.json_response({"updated": True})
+
 
 class StubCleanupService:
     def __init__(self) -> None:

tests/routes/test_example_images_routes.py

@@ -74,6 +74,11 @@ class StubExampleImagesProcessor:
         self.calls.append(("delete_custom_image", payload))
         return web.json_response({"operation": "delete_custom_image", "payload": payload})
 
+    async def set_example_image_nsfw_level(self, request: web.Request) -> web.StreamResponse:
+        payload = await request.json()
+        self.calls.append(("set_example_image_nsfw_level", payload))
+        return web.json_response({"operation": "set_example_image_nsfw_level", "payload": payload})
+
 
 class StubExampleImagesFileManager:
     def __init__(self) -> None:
@@ -246,6 +251,19 @@ async def test_delete_route_delegates_to_processor():
         assert harness.processor.calls == [("delete_custom_image", payload)]
 
 
+async def test_set_nsfw_route_delegates_to_processor():
+    payload = {"model_hash": "abc123", "nsfw_level": 4, "index": 0, "source": "civitai"}
+    async with example_images_app() as harness:
+        response = await harness.client.post(
+            "/api/lm/example-images/set-nsfw-level", json=payload
+        )
+        body = await response.json()
+
+        assert response.status == 200
+        assert body == {"operation": "set_example_image_nsfw_level", "payload": payload}
+        assert ("set_example_image_nsfw_level", payload) in harness.processor.calls
+
+
 async def test_file_routes_delegate_to_file_manager():
     open_payload = {"model_hash": "abc123"}
     files_params = {"model_hash": "def456"}
@@ -387,6 +405,10 @@ async def test_management_handler_methods_delegate() -> None:
             self.calls.append(("delete_custom_image", request))
             return "delete"
 
+        async def set_example_image_nsfw_level(self, request) -> str:
+            self.calls.append(("set_example_image_nsfw_level", request))
+            return "nsfw"
+
     recorder = Recorder()
     cleanup_service = StubExampleImagesCleanupService()
     use_case = StubImportUseCase()
@@ -458,6 +480,9 @@ def test_handler_set_route_mapping_includes_all_handlers() -> None:
         async def delete_custom_image(self, request):
             return {}
 
+        async def set_example_image_nsfw_level(self, request):
+            return {}
+
     download = ExampleImagesDownloadHandler(DummyUseCase(), DummyManager())
     cleanup_service = StubExampleImagesCleanupService()
     management = ExampleImagesManagementHandler(DummyUseCase(), DummyProcessor(), cleanup_service)
@@ -479,6 +504,7 @@ def test_handler_set_route_mapping_includes_all_handlers() -> None:
         "force_download_example_images",
         "import_example_images",
         "delete_example_image",
+        "set_example_image_nsfw_level",
         "cleanup_example_image_folders",
         "open_example_images_folder",
         "get_example_image_files",