initialize Electron desktop app and remove unused files

tests/client/pwa-metadata.test.ts

@@ -0,0 +1,27 @@
+import { readFileSync } from 'fs'
+import { describe, expect, it } from 'vitest'
+
+describe('PWA metadata', () => {
+  it('links manifest and touch icon from the client shell', () => {
+    const html = readFileSync('packages/client/index.html', 'utf8')
+
+    expect(html).toContain('rel="manifest" href="/manifest.webmanifest"')
+    expect(html).toContain('rel="apple-touch-icon" href="/logo.png"')
+    expect(html).toContain('name="apple-mobile-web-app-title" content="hermes-ui"')
+  })
+
+  it('ships a standalone web manifest with the Hermes icon', () => {
+    const manifest = JSON.parse(readFileSync('packages/client/public/manifest.webmanifest', 'utf8'))
+
+    expect(manifest.name).toBe('hermes-ui')
+    expect(manifest.display).toBe('standalone')
+    expect(manifest.start_url).toBe('/#/hermes/chat')
+    expect(manifest.icons).toEqual(expect.arrayContaining([
+      expect.objectContaining({
+        src: '/logo.png',
+        type: 'image/png',
+        purpose: 'any maskable',
+      }),
+    ]))
+  })
+})