fix: show empty jsonSchema for verbs with no req (#1725)

Fixes #1657

![Screenshot 2024-06-10 at 3 19
15 PM](https://github.com/TBD54566975/ftl/assets/51647/ada9ee41-79e2-4ae0-b9ee-f3c3df4c500e)
![Screenshot 2024-06-10 at 3 19
11 PM](https://github.com/TBD54566975/ftl/assets/51647/bf1ce2f2-5721-40e9-808f-390ee5f7f353)

backend/controller/console.go

@@ -99,16 +99,18 @@ func (c *ConsoleService) GetModules(ctx context.Context, req *connect.Request[pb
 				v := decl.ToProto().(*schemapb.Verb)
 				verbSchema := schema.VerbFromProto(v)
 				var jsonRequestSchema string
-				if requestData, ok := verbSchema.Request.(*schema.Ref); ok {
-					jsonSchema, err := schema.DataToJSONSchema(sch, *requestData)
-					if err != nil {
-						return nil, err
+				if verbSchema.Request == nil {
+					if requestData, ok := verbSchema.Request.(*schema.Ref); ok {
+						jsonSchema, err := schema.DataToJSONSchema(sch, *requestData)
+						if err != nil {
+							return nil, err
+						}
+						jsonData, err := json.MarshalIndent(jsonSchema, "", "  ")
+						if err != nil {
+							return nil, err
+						}
+						jsonRequestSchema = string(jsonData)
 					}
-					jsonData, err := json.MarshalIndent(jsonSchema, "", "  ")
-					if err != nil {
-						return nil, err
-					}
-					jsonRequestSchema = string(jsonData)
 				}
 
 				schemaString, err := verbSchemaString(sch, decl)

frontend/src/features/verbs/verb.utils.ts

@@ -32,6 +32,10 @@ const processJsonValue = (value: JsonValue): JsonValue =>{
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export const simpleJsonSchema = (verb: Verb): any => {
+  if (!verb.jsonRequestSchema) {
+    return {}
+  }
+
   let schema = JSON.parse(verb.jsonRequestSchema)
 
   if (schema.properties && isHttpIngress(verb)) {