Describe the bug

In @nuxthub/core v0.10.5, the database schema type definitions (.d.mts) are not generated during nuxt prepare or nuxt db generate, contrary to the intent of PR #758. The types are only generated when running nuxt dev, which breaks CI/CD workflows that rely on nuxt prepare followed by nuxt typecheck.

Steps to reproduce

1. Install @nuxthub/[email protected]
2. Create a database schema in server/db/schema.ts
3. Run rm -rf .nuxt node_modules/@nuxthub/db && pnpm prepare
4. Check for .nuxt/hub/db/schema.d.mts and node_modules/@nuxthub/db/schema.d.mts
5. Run nuxt typecheck

Expected behavior

• .nuxt/hub/db/schema.d.mts and node_modules/@nuxthub/db/schema.d.mts should be generated after nuxt prepare
• Type checking should pass without requiring nuxt dev to be run first
• This was the intended behavior of PR fix(db): generate schema types during nuxt prepare #758

Actual behavior

• Schema type definition files are NOT generated by nuxt prepare
• Files are only generated when nuxt dev is started
• nuxt typecheck fails with errors like: Module '"hub:db"' has no exported member 'db'

Root cause

In src/db/setup.ts, the buildDatabaseSchema() call is inside an if (!nuxt.options._prepare) block with app:templatesGenerated hook, which only fires during nuxt dev, not during nuxt prepare and nuxt db generate.