feat: add multi-tab terminal with SSH support, config editing, and dashboard redesign

- Terminal: multi-tab sessions, SSH connections, shell detection (zsh/bash/fish/wsl/powershell)
- Config: inline profile & provider editing, system update management
- Dashboard: grid layout with inline tools/notifications/workflows sections
- Add lucide-react icons, i18n keys (FR/EN), and new CSS components

💾 Generated with Crush

Assisted-by: GLM-5-Turbo via Crush <crush@charm.land>

web/src/components/App.jsx

@@ -1,6 +1,7 @@
 import { useState, useEffect, useCallback, useMemo } from 'react'
+import { LayoutDashboard, Sparkles, Terminal, Settings } from 'lucide-react'
 import api from '../api/client'
-import { getTheme, getThemeNames, applyTheme } from '../themes'
+import { getTheme, applyTheme } from '../themes'
 import { useI18n } from '../i18n'
 import Dashboard from './Dashboard'
 import Studio from './Studio'
@@ -16,10 +17,10 @@ export default function App() {
   const { t, layout } = useI18n()
 
   const TABS = useMemo(() => [
-    { id: 'dash', label: t('tabs.dashboard'), icon: '\u25A0' },
-    { id: 'studio', label: t('tabs.studio'), icon: '\u27E8\u27E9' },
-    { id: 'shell', label: t('tabs.shell'), icon: '$' },
-    { id: 'config', label: t('tabs.config'), icon: '\u2699' },
+    { id: 'dash', label: t('tabs.dashboard'), icon: <LayoutDashboard size={15} /> },
+    { id: 'studio', label: t('tabs.studio'), icon: <Sparkles size={15} /> },
+    { id: 'shell', label: t('tabs.shell'), icon: <Terminal size={15} /> },
+    { id: 'config', label: t('tabs.config'), icon: <Settings size={15} /> },
   ], [t])
 
   useEffect(() => {