@zenstackhq/server 3.6.x bundles h3 types into nuxt.d.mts, breaking consumers on newer h3

[genu]

Symptom

In 3.6.x, consuming @zenstackhq/server/nuxt from a project on a newer h3 (e.g. Nuxt 4 uses h3@1.15.9) produces a TS2345:

Argument of type 'H3Event<EventHandlerRequest>' is not assignable to parameter of type 'H3Event<EventHandlerRequest>'.
Type is missing the following properties: fetch, $fetch, waitUntil, captureError

Two H3Event types with the same name, structurally incompatible. Worked in 3.5.6.

Root cause

The published packages/server/dist/nuxt.d.mts inlines H3Event (and its transitive graph) from whatever h3 version sits in zenstack's own node_modules at build time — currently 1.15.5. So downstream projects on newer h3 end up with a stale structural copy.

The source is fine — packages/server/src/adapter/nuxt/handler.ts does import { type H3Event } from 'h3'. The issue is the build pipeline.

What changed in 3.6.0

Build tool was swapped from tsup → tsdown. tsup emitted declarations via tsc, preserving import ... from 'h3'. tsdown (via rolldown-plugin-dts) bundles declarations by default, and with no external list / no dts.resolve: false, it inlines types from any dep that isn't marked external.

Why h3 isn't external

packages/server/package.json lists h3 only as a devDependency, and the shared packages/config/tsdown-config/src/index.ts doesn't add it to external. Same likely applies to other adapter deps (nuxt, next, express, fastify, hono, elysia, @sveltejs/kit) — worth checking.

Suggested fix

One of:

• Add h3 (and the other adapter deps) to peerDependencies in packages/server/package.json, so tsdown treats them as external.
• Or mark them external explicitly in the server's tsdown.config.ts.
• Or disable dts bundling (dts: { resolve: false }) for this package.

Repro

Nuxt 4 project with @zenstackhq/server@3.6.1 + h3@1.15.9; pass the handler's event into any function typed with the real H3Event from h3. Downgrading to 3.5.6 or narrowing the consumer's param type to { headers: Headers } avoids the error.