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/he.json

@@ -528,6 +528,9 @@
     },
     "recipes": {
         "title": "מתכוני LoRA",
+        "actions": {
+            "sendCheckpoint": "שלח ל-ComfyUI"
+        },
         "controls": {
             "import": {
                 "action": "ייבא",
@@ -1254,6 +1257,9 @@
             "cannotSend": "לא ניתן לשלוח מתכון: חסר מזהה מתכון",
             "sendFailed": "שליחת המתכון ל-workflow נכשלה",
             "sendError": "שגיאה בשליחת המתכון ל-workflow",
+            "missingCheckpointPath": "נתיב ה-checkpoint אינו זמין",
+            "missingCheckpointInfo": "חסרים פרטי checkpoint",
+            "downloadCheckpointFailed": "הורדת checkpoint נכשלה: {message}",
             "cannotDelete": "לא ניתן למחוק מתכון: חסר מזהה מתכון",
             "deleteConfirmationError": "שגיאה בהצגת אישור המחיקה",
             "deletedSuccessfully": "המתכון נמחק בהצלחה",