add semantic search field message to note that model_size is irrelevant when embeddings provider is selected

web/public/locales/en/views/settings.json

@@ -1820,7 +1820,8 @@
       "mixedTypesSuggestion": "All detectors must use the same type. Remove existing detectors or select {{type}}."
     },
     "semanticSearch": {
-      "jinav2SmallModelSize": "The 'small' size with the Jina V2 model has high RAM and inference cost. The 'large' model with a discrete GPU is recommended."
+      "jinav2SmallModelSize": "The 'small' size with the Jina V2 model has high RAM and inference cost. The 'large' model with a discrete GPU is recommended.",
+      "modelSizeIgnoredForProvider": "Model size only applies to the built-in Jina models. This value will be ignored when using a GenAI embedding provider."
     }
   }
 }

web/src/components/config-form/section-configs/semantic_search.ts

@@ -29,6 +29,22 @@ const semanticSearch: SectionConfigOverrides = {
           ctx.formData?.model === "jinav2" &&
           ctx.formData?.model_size === "small",
       },
+      {
+        key: "model-size-ignored-for-provider",
+        field: "model_size",
+        messageKey: "configMessages.semanticSearch.modelSizeIgnoredForProvider",
+        severity: "info",
+        position: "after",
+        condition: (ctx) => {
+          const model = ctx.formData?.model;
+          return (
+            typeof model === "string" &&
+            model !== "" &&
+            model !== "jinav1" &&
+            model !== "jinav2"
+          );
+        },
+      },
     ],
     uiSchema: {
       model: {