fix: Terminal阻塞修复—cmd state+onPress+fetch /tools/exec

- IIFE内useState: cmd/out/running
- Run按钮→POST /tools/exec→显示stdout/stderr
- onSubmitEditing键盘发送
- loading disabled反馈

packages/client-android/App.tsx

@@ -130,25 +130,36 @@ export default function App() {
 
       {/* ── Terminal Tab ── */}
       {tab === 'terminal' && (
+        (() => {
+          const [cmd, setCmd] = useState('');
+          const [out, setOut] = useState('Execute remote commands via Gateway MCP.\nType a shell command and press Execute.\n');
+          const [running, setRunning] = useState(false);
+          const runCmd = async () => {
+            if (!cmd.trim() || running) return;
+            const c = cmd.trim(); setCmd(''); setRunning(true);
+            setOut(o => o + `$ ${c}\n`);
+            try {
+              const r = await fetch(`${gatewayUrl}/tools/exec`, { method:'POST', headers:{'Content-Type':'application/json'}, body:JSON.stringify({command:c}), signal:AbortSignal.timeout(30000) });
+              if (!r.ok) throw new Error(`HTTP ${r.status}`);
+              const d = await r.json() as any;
+              setOut(o => o + (d.stdout||d.stderr||JSON.stringify(d)) + '\n');
+            } catch(e:any) { setOut(o => o + `Error: ${e.message}\n`); }
+            finally { setRunning(false); }
+          };
+          return (
             <View style={styles.chatContainer}>
-          <View style={styles.termOutput}>
-            <ScrollView>
-              <Text style={styles.termText} selectable>Execute remote commands via Gateway MCP.{'\n'}Type a shell command and press Execute.{'\n'}</Text>
+              <ScrollView style={styles.termOutput}>
+                <Text style={styles.termText} selectable>{out}</Text>
               </ScrollView>
-          </View>
               <View style={styles.inputBar}>
-            <TextInput
-              style={styles.chatInput}
-              placeholder="ls -la /home"
-              placeholderTextColor="#475569"
-              autoCapitalize="none"
-              autoCorrect={false}
-            />
-            <TouchableOpacity style={styles.sendBtn}>
-              <Text style={styles.sendBtnText}>Run</Text>
+                <TextInput style={styles.chatInput} value={cmd} onChangeText={setCmd} placeholder="ls -la /home" placeholderTextColor="#475569" autoCapitalize="none" autoCorrect={false} onSubmitEditing={runCmd} returnKeyType="send" />
+                <TouchableOpacity style={[styles.sendBtn, running && styles.sendBtnDisabled]} onPress={runCmd} disabled={running}>
+                  <Text style={styles.sendBtnText}>{running ? '...' : 'Run'}</Text>
                 </TouchableOpacity>
               </View>
             </View>
+          );
+        })()
       )}
 
       {/* ── Settings Tab ── */}