docs/features/app-wizard.md lists non-existent templates node-server and static, which fail validation in POST /api/scaffold

[atomantic]

Problem

In docs/features/app-wizard.md:34, step 2 of "Mode 2: Create New App" instructs users:

2. **Template**: Select template (vite+express, node-server, static)

However, server/lib/validation.js:1100-1107 strictly restricts scaffoldSchema.template to SCAFFOLD_TEMPLATES:

export const SCAFFOLD_TEMPLATES = [
  'portos-stack',
  'vite-express',
  'vite-react',
  'express-api',
  'ios-native',
  'xcode-multiplatform'
];

And server/routes/scaffold.js:94-154 (GET /api/scaffold/templates) registers only these 6 templates.
Neither node-server nor static exists. Submitting either template value to POST /api/scaffold is rejected by Zod with a 400 VALIDATION_ERROR.

Furthermore, the API table in docs/features/app-wizard.md:55-62 omits the directory browser endpoint GET /api/scaffold/directories and helper route POST /api/scaffold/templates/create.

Trigger

A user or developer following docs/features/app-wizard.md attempts to invoke POST /api/scaffold with { "template": "node-server", ... } or { "template": "static", ... }.

Impact

The scaffolding request fails immediately with HTTP 400 (Invalid enum value). Meanwhile, actual supported scaffolding templates (portos-stack, vite-react, ios-native, xcode-multiplatform) are not discoverable from the feature guide.

Fix

1. Update docs/features/app-wizard.md line 34 to list the real templates: portos-stack, vite-express, vite-react, express-api, ios-native, xcode-multiplatform.
2. Add GET /api/scaffold/directories and POST /api/scaffold/templates/create to the API table in docs/features/app-wizard.md.
3. Verify test coverage in server/routes/scaffold.test.js or server/lib/validation.test.js.

Alternative rejected: Adding node-server and static to SCAFFOLD_TEMPLATES — rejected because express-api and vite-react supersede them, and PortOS does not maintain standalone static/node-server scaffolding scripts.

Acceptance Criteria

• docs/features/app-wizard.md lists the 6 actual templates from SCAFFOLD_TEMPLATES.
• docs/features/app-wizard.md documents GET /api/scaffold/directories.
• Existing scaffolding tests pass (npm test -- server/routes/scaffold.test.js).