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/en.json

@@ -528,6 +528,9 @@
     },
     "recipes": {
         "title": "LoRA Recipes",
+        "actions": {
+            "sendCheckpoint": "Send to ComfyUI"
+        },
         "controls": {
             "import": {
                 "action": "Import",
@@ -1254,6 +1257,9 @@
             "cannotSend": "Cannot send recipe: Missing recipe ID",
             "sendFailed": "Failed to send recipe to workflow",
             "sendError": "Error sending recipe to workflow",
+            "missingCheckpointPath": "Checkpoint path not available",
+            "missingCheckpointInfo": "Missing checkpoint information",
+            "downloadCheckpointFailed": "Failed to download checkpoint: {message}",
             "cannotDelete": "Cannot delete recipe: Missing recipe ID",
             "deleteConfirmationError": "Error showing delete confirmation",
             "deletedSuccessfully": "Recipe deleted successfully",