feat: move intersection

Author: mnahkies

packages/openapi-code-generator/src/typescript/server/typescript-koa/typescript-koa-router-builder.ts

@@ -99,12 +99,11 @@ export class KoaRouterBuilder extends AbstractRouterBuilder {
       operationId: builder.operationId,
       statements: [
         `const ${symbols.implPropName} = ${responder.implementation}`,
-        `type ${titleCase(symbols.responderName)} = typeof ${symbols.implPropName}['responder'] & KoaRuntimeResponder`,
         buildExport({
           name: symbols.implTypeName,
           value: `(
                     params: ${params.type},
-                    respond: ${titleCase(symbols.responderName)},
+                    respond: typeof ${symbols.implPropName}['responder'],
                     ctx: RouterContext
                   ) => Promise<KoaRuntimeResponse<unknown> | ${[
                     ...responseSchemas.specific.map(

packages/typescript-koa-runtime/src/server.ts

@@ -87,7 +87,7 @@ function isValidStatusCode(status: unknown): status is StatusCode {
   return !(status < 100 || status > 599)
 }
 
-export const b = <T>(fn: (r: ResponderBuilder) => T) => {
+export const b = <T>(fn: (r: ResponderBuilder) => T & KoaRuntimeResponder) => {
   // biome-ignore lint/suspicious/noExplicitAny: <explanation>
   const responses: any[] = []
   // biome-ignore lint/suspicious/noExplicitAny: <explanation>