Add app version display in Footer and implement version API endpoint

- Updated Footer.vue to show the application version for logged-in users.
- Added a new API endpoint to return the application version from package.json.
- Enhanced code-analysis.yml to require package version changes for main PRs.

tests/auth-endpoints.spec.ts

@@ -1,5 +1,6 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { createEvent, mockSuccessReadBody } from './setup'
+import { readFileSync } from 'fs'
 
 vi.mock('../server/utils/auth.js', () => {
   return {
@@ -60,6 +61,7 @@ import logoutHandler from '../server/api/auth/logout.post.js'
 import registerHandler from '../server/api/auth/register.post.js'
 import resetPasswordHandler from '../server/api/auth/reset-password.post.js'
 import statusHandler from '../server/api/auth/status.get.js'
+import versionHandler from '../server/api/app/version.get.js'
 
 describe('Auth API Endpoints', () => {
   afterEach(() => {
@@ -241,4 +243,22 @@ describe('Auth API Endpoints', () => {
       expect(response.user).toMatchObject({ id: '1' })
     })
   })
+
+  describe('GET /api/app/version', () => {
+    it('verlangt Login', async () => {
+      const event = createEvent()
+
+      await expect(versionHandler(event)).rejects.toMatchObject({ statusCode: 401 })
+    })
+
+    it('liefert eingeloggten Benutzern die package.json-Version', async () => {
+      const event = createEvent({ cookies: { auth_token: 'token' } })
+      authUtils.getUserFromToken.mockResolvedValue({ id: '1', email: 'user@example.com', roles: ['mitglied'] })
+      const packageJson = JSON.parse(readFileSync(new URL('../package.json', import.meta.url), 'utf8'))
+
+      const response = await versionHandler(event)
+
+      expect(response.version).toBe(packageJson.version)
+    })
+  })
 })