Tweaks (#23292)

* add review padding to explore debug replay api calls

* add semantic search model size widget

disables model_size select with n/a text when an embeddings genai provider is selected

* regenerate zone contours and per-zone filter masks on detect resolution change

* treat null as a clear sentinel in buildOverrides so nullable field edits don't snap back

* extract replay config sheet to new component

* add validation and messages for detect settings

web/public/locales/en/config/validation.json

@@ -28,5 +28,8 @@
       "detectRequired": "At least one input stream must be assigned the 'detect' role.",
       "hwaccelDetectOnly": "Only the input stream with the detect role can define hardware acceleration arguments."
     }
+  },
+  "detect": {
+    "dimensionMustBeEven": "Must be an even number."
   }
 }