feat: add checkpoint hash filtering and navigation

- Add checkpoint hash parameter parsing to backend routes
- Implement checkpoint hash filtering in frontend API client
- Add click navigation from recipe modal to checkpoints page
- Update checkpoint items to use pointer cursor for better UX

Checkpoint items in recipe modal are now clickable and will navigate to the checkpoints page with appropriate hash filtering applied. This improves user workflow when wanting to view checkpoint details from recipes.

locales/es.json

@@ -528,6 +528,9 @@
     },
     "recipes": {
         "title": "Recetas de LoRA",
+        "actions": {
+            "sendCheckpoint": "Enviar a ComfyUI"
+        },
         "controls": {
             "import": {
                 "action": "Importar",
@@ -1254,6 +1257,9 @@
             "cannotSend": "No se puede enviar receta: Falta ID de receta",
             "sendFailed": "Error al enviar receta al flujo de trabajo",
             "sendError": "Error enviando receta al flujo de trabajo",
+            "missingCheckpointPath": "Ruta del checkpoint no disponible",
+            "missingCheckpointInfo": "Falta información del checkpoint",
+            "downloadCheckpointFailed": "Error al descargar el checkpoint: {message}",
             "cannotDelete": "No se puede eliminar receta: Falta ID de receta",
             "deleteConfirmationError": "Error mostrando confirmación de eliminación",
             "deletedSuccessfully": "Receta eliminada exitosamente",