fix(massimo-cli): declare frontend setter exports in generated types

[mirko-pira]

fix(massimo-cli): declare frontend setter exports in generated types

Problem

For frontend clients (--frontend), the generated implementation file exports three module-level functions:

export const setBaseUrl = (newUrl: string) : void => { baseUrl = sanitizeUrl(newUrl) }
export const setDefaultHeaders = (headers: object): void => { defaultHeaders = headers }
export const setDefaultFetchParams = (fetchParams: RequestInit): void => { defaultFetchParams = fetchParams }

but the generated <name>-types.d.ts never declares them. They only appear as methods on the client interface (setBaseUrl(newUrl: string): void; etc.), which does not describe the module's named exports.

Any consumer whose tooling resolves types from the .d.ts — for example a package that ships the generated client with a "types" field pointing at <name>-types.d.ts — gets TS2305: Module has no exported member 'setDefaultHeaders' on

import build, { setDefaultHeaders } from './client'

even though the symbol exists at runtime. Until now we have been post-processing the generated .d.ts with sed to re-add the three declarations after every regeneration.

Reproduction

massimo openapi.json --frontend --language ts --name api

api/api.mts exports setBaseUrl, setDefaultHeaders, setDefaultFetchParams; api/api-types.d.ts contains no top-level declaration for any of them. Same for --language js (the JSDoc @type annotations reference the interface members, but a .d.ts-only consumer still sees no named exports).

Fix

generateTypesFromOpenAPI in packages/massimo-cli/lib/frontend-openapi-generator.js now emits, right after the client interface:

export declare const setBaseUrl: Api['setBaseUrl'];
export declare const setDefaultHeaders: Api['setDefaultHeaders'];
export declare const setDefaultFetchParams: Api['setDefaultFetchParams'];

The declarations are typed via the interface's own members (same pattern the JS implementation already uses in its JSDoc @type annotations), so they can never drift from the interface.

Tests

• test/frontend-openapi.test.js: extended the factoryType template in the base test to pin the exact placement of the three declarations, and added explicit assertions in "generate frontend client from path" and in the watt-config test.
• test/cli-openapi-status-code-204.test.js: updated the expected .d.ts template to the new output.

Full massimo-cli suite: 136/136 passing (node --test test/*.test.js), tsd and eslint clean.