initialize Electron desktop app and remove unused files

tests/client/http-error.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest'
+import { responseErrorMessage } from '@/utils/http-error'
+
+describe('responseErrorMessage', () => {
+  it('uses JSON error fields when available', async () => {
+    const response = new Response(JSON.stringify({ error: 'Profile access denied' }), {
+      status: 403,
+      headers: { 'content-type': 'application/json' },
+    })
+
+    await expect(responseErrorMessage(response, 'Upload failed')).resolves.toBe('Upload failed: 403 - Profile access denied')
+  })
+
+  it('falls back to text response bodies', async () => {
+    const response = new Response('Forbidden by policy', { status: 403 })
+
+    await expect(responseErrorMessage(response, 'Upload failed')).resolves.toBe('Upload failed: 403 - Forbidden by policy')
+  })
+
+  it('keeps the original status-only fallback when no body exists', async () => {
+    const response = new Response('', { status: 500 })
+
+    await expect(responseErrorMessage(response, 'Upload failed')).resolves.toBe('Upload failed: 500')
+  })
+})