backend/frontend/runtime: 训练面板 / session 隔离 / agent runtime 调整

- backend/api/server.py：训练 step-detail / pipeline 卡片排序逻辑
- frontend：thread-list / thread / training-pipeline-panel / step-detail-sheet 配套调整，新增 metrics-chart-panel
- src/agent_*：tool spec / runtime / prompting 配套
- .gitignore 加 .logs/

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

frontend/app/lib/claw-active-session.ts

@@ -87,3 +87,19 @@ function normalizeSessionId(value: unknown) {
 	const trimmed = value.trim();
 	return trimmed || null;
 }
+
+// 记录"前端刚生成的 LOCALID"。AssistantWorkspace 的 draft cache effect 用它
+// 区分：从 newTask 切到一个**新生成**的 LOCALID（草稿应继承）vs 切到一个
+// **侧栏点击**的老 LOCALID（草稿不应继承）。
+const freshLocalIds = new Set<string>();
+
+export function markFreshLocalId(sessionId: string) {
+	freshLocalIds.add(sessionId);
+}
+
+export function consumeFreshLocalId(sessionId: string | null): boolean {
+	if (!sessionId) return false;
+	if (!freshLocalIds.has(sessionId)) return false;
+	freshLocalIds.delete(sessionId);
+	return true;
+}