feat(workspace): group saved negative variants in native library (#208)

py/api/__init__.py

@@ -23,6 +23,7 @@ from PIL import Image
 
 from .prompts import PromptRoutesMixin
 from .pairs import PairRoutesMixin
+from .library import LibraryRoutesMixin
 from .images import ImageRoutesMixin
 from .admin import AdminRoutesMixin
 from .logging_routes import LoggingRoutesMixin
@@ -243,6 +244,7 @@ async def _gzip_middleware(request, handler):
 
 class PromptManagerAPI(
     PairRoutesMixin,
+    LibraryRoutesMixin,
     PromptRoutesMixin,
     ImageRoutesMixin,
     AdminRoutesMixin,
@@ -399,6 +401,7 @@ class PromptManagerAPI(
         # ── Register domain-specific routes from mixins ───────────────
 
         self._register_pair_routes(routes)
+        self._register_library_routes(routes)
         self._register_prompt_routes(routes)
         self._register_image_routes(routes)
         self._register_admin_routes(routes)