fix(api): 项目状态点严格化——running 只数真实活跃 run(status=started)

之前 running 按任务状态(executing/analyzing/speccing)计，导致被冻结/排队的子任务
也让点变青。改为只数真实在途 run（runs.status='started' JOIN 本项目任务），只有活 agent 才青。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/store/store.ts

@@ -225,7 +225,10 @@ export class Store {
     for (const r of rows) by[r.status] = r.n;
     const g = (s: string): number => by[s] || 0;
     const executing = g('executing');
-    const running = executing + g('analyzing') + g('speccing');                       // agent 在跑：executor + planner
+    // 严格「活 agent」：真实在途 run（status='started'），而非按任务状态——冻结/排队/待审中的都不算
+    const running = (this.db.prepare(
+      `SELECT COUNT(*) AS n FROM runs r JOIN tasks t ON r.task_id = t.id WHERE t.project_id = ? AND r.status = 'started'`,
+    ).get(projectId) as { n: number }).n;
     const attention = g('plan_review') + g('spec_review') + g('exec_review') + g('needs_attention');  // 待审批闸 + 需人工
     const TERMINAL = new Set(['done', 'cancelled']);
     let alive = 0;