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/src/utils/configUtil.ts

@@ -229,7 +229,12 @@ export function buildOverrides(
 
     const result: JsonObject = {};
     for (const [key, value] of Object.entries(currentObj)) {
-      if (value === undefined && baseObj && baseObj[key] !== undefined) {
+      if (
+        (value === undefined || value === null) &&
+        baseObj &&
+        baseObj[key] !== undefined &&
+        baseObj[key] !== null
+      ) {
         result[key] = "";
         continue;
       }