feat: use managed model capabilities for reasoning and image input

shared/user-model-config.ts

@@ -51,7 +51,7 @@ function normalizeImportedModelCapability(value: unknown): ImportedModelCapabili
   };
 }
 
-function normalizeImportedModelWebSearchCapability(
+export function normalizeImportedModelWebSearchCapability(
   value: unknown,
 ): ImportedModelWebSearchCapability | null {
   if (!value || typeof value !== 'object' || Array.isArray(value)) return null;