feat: add StartupLogPanel component for deployment startup logs

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/StartupLogPanel.tsx

@@ -0,0 +1,46 @@
+import { LogViewer } from '@cameleer/design-system';
+import { useStartupLogs } from '../api/queries/logs';
+import type { Deployment } from '../api/queries/admin/apps';
+import styles from './StartupLogPanel.module.css';
+
+interface StartupLogPanelProps {
+  deployment: Deployment;
+  appSlug: string;
+  envSlug: string;
+}
+
+export function StartupLogPanel({ deployment, appSlug, envSlug }: StartupLogPanelProps) {
+  const isStarting = deployment.status === 'STARTING';
+  const isFailed = deployment.status === 'FAILED';
+
+  const { data } = useStartupLogs(appSlug, envSlug, deployment.createdAt, isStarting);
+
+  const entries = data?.data ?? [];
+
+  if (entries.length === 0 && !isStarting) return null;
+
+  return (
+    <div className={styles.panel}>
+      <div className={styles.header}>
+        <div className={styles.headerLeft}>
+          <span className={styles.title}>Startup Logs</span>
+          {isStarting && (
+            <>
+              <span className={`${styles.badge} ${styles.badgeLive}`}>● live</span>
+              <span className={styles.pollingHint}>polling every 3s</span>
+            </>
+          )}
+          {isFailed && (
+            <span className={`${styles.badge} ${styles.badgeStopped}`}>stopped</span>
+          )}
+        </div>
+        <span className={styles.lineCount}>{entries.length} lines</span>
+      </div>
+      {entries.length > 0 ? (
+        <LogViewer entries={entries} maxHeight={300} />
+      ) : (
+        <div className={styles.empty}>Waiting for container output...</div>
+      )}
+    </div>
+  );
+}