fix(terminal): ignore invalid shell config from race condition

Reject shell paths with length <= 1 to prevent errors when user
input is accidentally sent as init message.

Assisted-by: MiniMax-M2.7 via Crush <crush@charm.land>

internal/api/terminal.go

@@ -105,6 +105,12 @@ func (s *Server) handleTerminalWS(w http.ResponseWriter, r *http.Request) {
 			}
 		}
 
+		// Ignore invalid shell paths (e.g., single characters from race condition)
+		if len(shell) <= 1 {
+			conn.WriteJSON(wsMessage{Type: "error", Data: "invalid shell config"})
+			return
+		}
+
 		if _, err := os.Stat(shell); err != nil {
 			conn.WriteJSON(wsMessage{Type: "error", Data: fmt.Sprintf("shell not found: %s", shell)})
 			return

web/src/components/Shell.jsx

@@ -163,6 +163,17 @@ export default function Shell({ api }) {
     name: '', host: '', port: 22, user: '', key_path: '',
   })
 
+  const [aiMessages, setAiMessages] = useState([
+    { role: 'ai', content: t('shell.aiWelcome') }
+  ])
+  const [aiInput, setAiInput] = useState('')
+  const [aiLoading, setAiLoading] = useState(false)
+  const aiMessagesRef = useRef(null)
+
+  useEffect(() => {
+    aiMessagesRef.current?.scrollTo(0, aiMessagesRef.current.scrollHeight)
+  }, [aiMessages])
+
   useEffect(() => {
     api.getTerminalSessions().then(d => {
       setSshConnections(d.ssh || [])
@@ -361,6 +372,21 @@ export default function Shell({ api }) {
     }
   }
 
+  const handleAiSend = async () => {
+    if (!aiInput.trim() || aiLoading) return
+    const text = aiInput.trim()
+    setAiMessages(prev => [...prev, { role: 'user', content: text }])
+    setAiInput('')
+    setAiLoading(true)
+    try {
+      const res = await api.runCommand(`echo "AI: ${text}"`, '')
+      setAiMessages(prev => [...prev, { role: 'ai', content: res.output || t('shell.noResponse') }])
+    } catch (err) {
+      setAiMessages(prev => [...prev, { role: 'ai', content: `${t('shell.error')}: ${err.message}` }])
+    }
+    setAiLoading(false)
+  }
+
   return (
     <div className="shell-layout">
       <div className="shell-terminal-col">
@@ -475,6 +501,27 @@ export default function Shell({ api }) {
         </div>
       </div>
 
+      <div className="shell-ai-col">
+        <div className="ai-panel-header">{t('shell.aiAssistant')}</div>
+        <div className="ai-panel-messages" ref={aiMessagesRef}>
+          {aiMessages.map((msg, i) => (
+            <div key={i} className={`ai-message ${msg.role}`}>
+              {msg.content}
+            </div>
+          ))}
+          {aiLoading && <div style={{ textAlign: 'center', padding: 8 }}><span className="spinner" /></div>}
+        </div>
+        <div className="ai-panel-input">
+          <input
+            value={aiInput}
+            onChange={e => setAiInput(e.target.value)}
+            onKeyDown={e => e.key === 'Enter' && handleAiSend()}
+            placeholder={t('shell.askAi')}
+          />
+          <button className="sm" onClick={handleAiSend} disabled={!aiInput.trim()}>{t('shell.send')}</button>
+        </div>
+      </div>
+
       {showSshModal && (
         <div className="shell-modal-overlay" onClick={() => setShowSshModal(false)}>
           <div className="shell-modal" onClick={e => e.stopPropagation()}>

web/src/i18n/en.js

@@ -107,6 +107,9 @@ const en = {
     systemTerminals: 'System terminals',
     switchTerminal: 'Switch terminal',
     localShell: 'Local Shell',
+    aiAssistant: 'AI Assistant',
+    aiWelcome: 'Hello! I can help you with terminal commands. Ask me anything!',
+    askAi: 'Ask AI assistant...',
   },
 
   config: {

web/src/i18n/fr.js

@@ -107,6 +107,9 @@ const fr = {
     systemTerminals: 'Terminaux syst\u00e8me',
     switchTerminal: 'Changer de terminal',
     localShell: 'Shell local',
+    aiAssistant: 'Assistant IA',
+    aiWelcome: 'Bonjour ! Je peux vous aider avec les commandes du terminal. Demandez-moi n\'importe quoi !',
+    askAi: 'Interroger l\'assistant IA...',
   },
 
   config: {

web/src/styles/global.css

@@ -385,6 +385,15 @@ input::placeholder { color: var(--text-disabled); }
 .connection-dot.on { background: var(--success); box-shadow: 0 0 6px var(--success); }
 .connection-dot.off { background: var(--error); }
 
+.shell-ai-col { width: 320px; border-left: 1px solid var(--border); background: var(--bg-surface); display: flex; flex-direction: column; flex-shrink: 0; }
+.ai-panel-header { padding: 12px 16px; border-bottom: 1px solid var(--border); font-weight: 700; font-size: 13px; color: var(--accent); }
+.ai-panel-messages { flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 8px; }
+.ai-message { padding: 8px 12px; border-radius: var(--radius); font-size: 13px; line-height: 1.5; word-break: break-word; }
+.ai-message.ai { background: var(--bg-card); border-left: 3px solid var(--accent); }
+.ai-message.user { background: var(--accent-bg); border-left: 3px solid var(--accent-muted); }
+.ai-panel-input { display: flex; gap: 6px; padding: 10px 12px; border-top: 1px solid var(--border); }
+.ai-panel-input input { flex: 1; font-size: 13px; padding: 6px 10px; }
+
 .shell-modal-overlay {
   position: fixed; inset: 0; background: rgba(0,0,0,0.6);
   display: flex; align-items: center; justify-content: center; z-index: 1000;
@@ -570,18 +579,60 @@ input::placeholder { color: var(--text-disabled); }
 .feed-loading { display: flex; align-items: center; justify-content: center; padding: 60px 0; }
 .feed-item { display: flex; gap: 10px; padding: 8px 12px; border-radius: var(--radius); animation: fadeIn 0.15s ease-out; }
 .feed-item:hover { background: var(--bg-card); }
-.feed-item.user { background: var(--bg-card); border-left: 3px solid var(--accent-muted); }
-.feed-item.assistant { }
+.feed-item.user { background: var(--bg-card); border-left: 3px solid #FFD740; }
+.feed-item.assistant { border-left: 3px solid transparent; }
+.feed-item.assistant:hover { border-left-color: var(--accent-dark); }
 .feed-item.system { align-items: center; gap: 8px; padding: 6px 12px; }
-.feed-avatar { width: 24px; height: 24px; border-radius: 50%; background: var(--accent-bg); color: var(--accent); display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
+.feed-avatar { width: 28px; height: 28px; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; font-size: 14px; }
+.feed-avatar.user-rank { background: rgba(255, 215, 64, 0.15); }
+.feed-avatar.ai-rank { background: var(--accent-bg); }
+.feed-rank-icon { display: flex; align-items: center; justify-content: center; }
 .feed-body { flex: 1; min-width: 0; }
 .feed-header { display: flex; align-items: center; gap: 8px; margin-bottom: 2px; }
+.feed-rank-badge {
+  font-size: 9px; font-weight: 800; font-family: var(--font-mono);
+  padding: 1px 6px; border-radius: 3px; border: 1px solid;
+  letter-spacing: 0.5px; text-transform: uppercase;
+  background: rgba(255, 215, 64, 0.08);
+}
 .feed-role { font-size: 11px; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.5px; }
 .feed-time { font-size: 10px; color: var(--text-disabled); font-family: var(--font-mono); }
 .feed-content { font-size: 14px; line-height: 1.7; color: var(--text-primary); word-break: break-word; }
 .feed-system-badge { width: 6px; height: 6px; border-radius: 50%; background: var(--accent-dim); flex-shrink: 0; }
 .feed-system-text { font-size: 12px; color: var(--text-tertiary); font-style: italic; flex: 1; }
 
+.feed-thinking-block {
+  background: var(--bg-surface); border: 1px solid var(--border); border-left: 2px solid var(--accent-dim);
+  border-radius: var(--radius); margin: 6px 0 8px; overflow: hidden;
+  transition: all 0.3s ease;
+}
+.feed-thinking-block.active {
+  border-left-color: var(--warning);
+}
+.feed-thinking-block.done {
+  border-left-color: var(--text-disabled);
+  opacity: 0.7;
+}
+.feed-thinking-block.done .feed-thinking-content {
+  max-height: 80px;
+  overflow-y: auto;
+}
+.feed-thinking-header {
+  display: flex; align-items: center; gap: 6px;
+  padding: 6px 10px; font-size: 10px; font-weight: 700;
+  color: var(--text-tertiary); text-transform: uppercase; letter-spacing: 0.5px;
+  background: var(--bg-card); border-bottom: 1px solid var(--border);
+}
+.feed-thinking-header svg { color: var(--warning); }
+.feed-thinking-dots { display: inline-flex; gap: 2px; margin-left: 4px; }
+.feed-thinking-dots span { width: 4px; height: 4px; border-radius: 50%; background: var(--warning); animation: bounce 1.2s ease-in-out infinite; }
+.feed-thinking-dots span:nth-child(2) { animation-delay: 0.15s; }
+.feed-thinking-dots span:nth-child(3) { animation-delay: 0.3s; }
+.feed-thinking-content {
+  padding: 8px 10px; font-size: 12px; color: var(--text-tertiary);
+  font-style: italic; line-height: 1.5; max-height: 120px; overflow-y: auto;
+}
+
 .studio-code-block {
   background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius);
   overflow: hidden; margin: 8px 0;