feat: add web terminal, improve README, fix node-pty and i18n issues

- Add web terminal view with xterm.js and node-pty WebSocket backend
- Rewrite README with badges, feature table, mobile demo video
- Add package keywords and improved description for npm/GitHub SEO
- Fix node-pty spawn-helper missing execute permission after npm install -g
- Auto-fix node-pty permissions on CLI startup
- Fix duplicate 'error' key in en.ts and zh.ts i18n files
- Remove nested NSpin in PlatformSettings (causes invisible loading spinner)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/hermes-web-ui.mjs

@@ -2,13 +2,14 @@
 import { spawn, execSync } from 'child_process'
 import { resolve, dirname, join } from 'path'
 import { fileURLToPath } from 'url'
-import { readFileSync, writeFileSync, unlinkSync, mkdirSync, openSync } from 'fs'
+import { readFileSync, writeFileSync, unlinkSync, mkdirSync, openSync, chmodSync } from 'fs'
 import { randomBytes } from 'crypto'
 import { homedir } from 'os'
 
 const __dirname = dirname(fileURLToPath(import.meta.url))
 const serverEntry = resolve(__dirname, '..', 'dist', 'server', 'index.js')
-const pkg = JSON.parse(readFileSync(resolve(__dirname, '..', 'package.json'), 'utf-8'))
+const pkgDir = resolve(__dirname, '..')
+const pkg = JSON.parse(readFileSync(resolve(pkgDir, 'package.json'), 'utf-8'))
 const VERSION = pkg.version
 const PID_DIR = resolve(homedir(), '.hermes-web-ui')
 const PID_FILE = join(PID_DIR, 'server.pid')
@@ -16,6 +17,15 @@ const LOG_FILE = join(PID_DIR, 'server.log')
 const TOKEN_FILE = resolve(__dirname, '..', 'dist', 'server', 'data', '.token')
 const DEFAULT_PORT = 8648
 
+// ─── Auto-fix node-pty native module ──────────────────────────
+function ensureNativeModules() {
+  const prebuildDir = join(pkgDir, 'node_modules', 'node-pty', 'prebuilds', `${process.platform}-${process.arch}`)
+  const helper = join(prebuildDir, 'spawn-helper')
+  try {
+    chmodSync(helper, 0o755)
+  } catch {}
+}
+
 function getToken() {
   try {
     return readFileSync(TOKEN_FILE, 'utf-8').trim()
@@ -105,6 +115,7 @@ function startDaemon(port) {
 
   mkdirSync(PID_DIR, { recursive: true })
 
+  ensureNativeModules()
   const token = ensureToken()
 
   const logStream = openSync(LOG_FILE, 'a')
@@ -260,6 +271,7 @@ switch (command) {
     doUpdate()
     break
   default:
+    ensureNativeModules()
     const port = !isNaN(command) ? parseInt(command) : DEFAULT_PORT
     const child = spawn(process.execPath, [serverEntry], {
       stdio: 'inherit',