Phase 002: rebrand to hermes-ui and consolidate i18n to zh/en

Removes the ekko / hermes-web-ui branding from the whole tree and drops
eight locale files, so the project presents one name and one language pair.

Data compatibility is deliberate, not accidental: DB filenames, the JWT
audience, and skill manifest ownership all still recognise their pre-rename
values so existing deployments under ~/.hermes-web-ui keep working without a
re-login or a re-injection.

scripts/harness-check.mjs now scans for the legacy strings and fails the
build on any new occurrence, with an explicit allow-list (and reasons) for
the compatibility paths that must keep them.

tests/client/chat-view-tab-title.test.ts

@@ -80,7 +80,7 @@ function makeSession(title: string): Session {
 describe('ChatView tab title', () => {
   beforeEach(() => {
     vi.clearAllMocks()
-    document.title = 'Hermes Studio'
+    document.title = 'hermes-ui'
     setActivePinia(createPinia())
 
     const appStore = useAppStore()
@@ -107,7 +107,7 @@ describe('ChatView tab title', () => {
     expect(document.title).toBe('Implementation Notes')
 
     wrapper.unmount()
-    expect(document.title).toBe('Hermes Studio')
+    expect(document.title).toBe('hermes-ui')
   })
 
   it('falls back to the product title when the session title is blank', () => {
@@ -116,7 +116,7 @@ describe('ChatView tab title', () => {
 
     const wrapper = mount(ChatView)
 
-    expect(document.title).toBe('Hermes Studio')
+    expect(document.title).toBe('hermes-ui')
     wrapper.unmount()
   })
 })

tests/client/i18n-coverage.test.ts

@@ -6,14 +6,6 @@ import { changelog } from '@/data/changelog'
 import { messages, supportedLocales } from '@/i18n/messages'
 import en from '@/i18n/locales/en'
 import zh from '@/i18n/locales/zh'
-import zhTW from '@/i18n/locales/zh-TW'
-import ja from '@/i18n/locales/ja'
-import ko from '@/i18n/locales/ko'
-import fr from '@/i18n/locales/fr'
-import es from '@/i18n/locales/es'
-import de from '@/i18n/locales/de'
-import pt from '@/i18n/locales/pt'
-import ru from '@/i18n/locales/ru'
 import { createI18n } from 'vue-i18n'
 
 const SOURCE_ROOT = join(process.cwd(), 'packages/client/src')
@@ -23,14 +15,6 @@ const allMessages: Record<string, Record<string, unknown>> = { en }
 const rawMessages: Record<string, Record<string, unknown>> = {
   en,
   zh,
-  'zh-TW': zhTW,
-  ja,
-  ko,
-  fr,
-  es,
-  de,
-  pt,
-  ru,
 }
 
 function walkFiles(dir: string, files: string[] = []): string[] {

tests/client/login-view.test.ts

@@ -117,8 +117,8 @@ describe('LoginView password login', () => {
     expect(wrapper.find('.login-lock-hint').text()).toContain('login.defaultLoginResetHint')
     const commands = wrapper.findAll('.login-lock-hint code').map(command => command.text())
     expect(commands).toEqual([
-      'hermes-web-ui clear-login-locks --restart',
-      'hermes-web-ui reset-default-login',
+      'hermes-ui clear-login-locks --restart',
+      'hermes-ui reset-default-login',
     ])
   })
 

tests/client/pwa-metadata.test.ts

@@ -7,13 +7,13 @@ describe('PWA metadata', () => {
 
     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 Studio"')
+    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 Studio')
+    expect(manifest.name).toBe('hermes-ui')
     expect(manifest.display).toBe('standalone')
     expect(manifest.start_url).toBe('/#/hermes/chat')
     expect(manifest.icons).toEqual(expect.arrayContaining([