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>

package.json

@@ -1,13 +1,31 @@
 {
   "name": "hermes-web-ui",
-  "version": "0.2.5",
-  "description": "Hermes Agent Web UI - Chat and Job Management Dashboard",
+  "version": "0.2.6",
+  "description": "Web dashboard for Hermes Agent — multi-platform AI chat, session management, scheduled jobs, usage analytics & channel configuration (Telegram, Discord, Slack, WhatsApp)",
   "repository": {
     "type": "git",
     "url": "https://github.com/EKKOLearnAI/hermes-web-ui.git"
   },
   "homepage": "https://github.com/EKKOLearnAI/hermes-web-ui",
   "license": "MIT",
+  "keywords": [
+    "hermes",
+    "ai-agent",
+    "llm",
+    "chat-ui",
+    "dashboard",
+    "telegram",
+    "discord",
+    "slack",
+    "whatsapp",
+    "matrix",
+    "feishu",
+    "weixin",
+    "multi-platform",
+    "vue3",
+    "typescript",
+    "naive-ui"
+  ],
   "bin": {
     "hermes-web-ui": "./bin/hermes-web-ui.mjs"
   },
@@ -25,9 +43,12 @@
   ],
   "dependencies": {
     "@koa/bodyparser": "^5.0.0",
-    "axios": "^1.9.0",
     "@koa/cors": "^5.0.0",
     "@koa/router": "^13.1.0",
+    "@xterm/addon-fit": "^0.11.0",
+    "@xterm/addon-web-links": "^0.12.0",
+    "@xterm/xterm": "^6.0.0",
+    "axios": "^1.9.0",
     "highlight.js": "^11.11.1",
     "js-yaml": "^4.1.1",
     "koa": "^2.15.3",
@@ -35,11 +56,13 @@
     "koa-static": "^5.0.0",
     "markdown-it": "^14.1.1",
     "naive-ui": "^2.44.1",
+    "node-pty": "^1.1.0",
     "pinia": "^3.0.4",
     "qrcode": "^1.5.4",
     "vue": "^3.5.32",
     "vue-i18n": "^11.3.2",
-    "vue-router": "^4.6.4"
+    "vue-router": "^4.6.4",
+    "ws": "^8.20.0"
   },
   "devDependencies": {
     "@types/js-yaml": "^4.0.9",
@@ -51,6 +74,7 @@
     "@types/markdown-it": "^14.1.2",
     "@types/node": "^24.12.2",
     "@types/qrcode": "^1.5.6",
+    "@types/ws": "^8.18.1",
     "@vitejs/plugin-vue": "^6.0.5",
     "@vue/tsconfig": "^0.9.1",
     "concurrently": "^9.2.1",