fix(nuxt): add type exports and generate runtime .d.ts files

[Copilot]

In v1.2.6, imports from #logto fail with "File '.../handler.d.ts' is not a module" because package.json lacks type exports and @nuxt/module-builder generates empty .d.ts files for runtime sources.

Changes

• package.json: Added types field pointing to ./dist/types.d.mts in exports and root level
• build.config.ts: Post-build hook runs mkdist with declaration: true to regenerate runtime .d.ts files with actual type definitions
• tsconfig.json: Excluded build.config.ts and playground from type checking

Result

// Previously failed with "File is not a module"
import { logtoEventHandler } from "#logto";

export default defineEventHandler(async (event) => {
  const config = useRuntimeConfig(event);
  await logtoEventHandler(event, config); // Now properly typed
  const accessToken = await event.context.logtoClient.getAccessToken();
  return { accessToken };
});

The #logto alias resolves to dist/runtime/utils/handler.js, which now has a populated handler.d.ts with proper type declarations.

Original prompt

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This section details on the original issue you should resolve

<issue_title>bug: @logto/nuxt 1.2.6 Can't import { logtoEventHandler } from "#logto";</issue_title> <issue_description>### Describe the bug

After update to version 1.2.6 Can't import { logtoEventHandler } from "#logto" in server middleware any more. Error message:

File '/node_modules/.pnpm/@[email protected][email protected]/node_modules/@logto/nuxt/dist/runtime/utils/handler.d.ts' is not a module.

All typed files (e.g : dist/runtime/utils/handler.d.ts) are empty.

After compared package.json between v1.2.4 and v1.2.6 No types been exported

package.json v1.2.4

  "exports": {
    ".": {
      "import": "./dist/module.mjs",
      "types": "./dist/module.d.ts"
    }
  },
  "types": "./dist/module.d.ts",

package.json v1.2.6

  "exports": {
    ".": {
      "import": "./dist/module.mjs",
    }
  }

Expected behavior

import { logtoEventHandler } from "#logto";
 
export default defineEventHandler(async (event) => {
  const config = useRuntimeConfig(event);
  await logtoEventHandler(event, config);
  const accessToken = await event.context.logtoClient.getAccessToken();
  return { accessToken };
});

How to reproduce?

Install version 1.2.6, then

// server/middleware/auth.ts
import { logtoEventHandler } from "#logto";
 
export default defineEventHandler(async (event) => {
  const config = useRuntimeConfig(event);
  await logtoEventHandler(event, config);
  const accessToken = await event.context.logtoClient.getAccessToken();
  return { accessToken };
});

Environment

Self-hosted (Docker image)

Screenshots

No response</issue_description>

Comments on the Issue (you are @copilot in this section)

@wangsijie @Drunkenpilot could you please try to use it in ESM project? Which is `"type": "module"` in `package.json`. @wangsijie @Drunkenpilot Hi, thanks for the report, I can reproduce this issue, any suggestions? It does not work by `"types": "./dist/module.d.ts"`

• Fixes logto-io/js#985

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