feat(agent): budget reminders, usage while waiting, budget-exceeded status and dedupe

- tool results carry a budget reminder near limits; text before the last tool
  call is dropped as report when cut by budget/abort
- usage persisted when a run suspends, so waiting sessions show spent tokens
- task page shows budget_exceeded via business.outcome instead of completed
- budget-exceeded decisions merge by root cause (decision / schedule / goal
  template); new summaries added to investigate allowlist

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/server/src/modules/agent/runner.ts

@@ -59,6 +59,9 @@ export const INVESTIGATE_CAPABILITIES = [
   "release.inspect",
   "inventory.query",
   "task.inspect",
+  "download.inspect",
+  "decision.list",
+  "subscription.list",
   "identity.resolve",
 ] as const;
 /**
@@ -266,7 +269,8 @@ function systemPromptFor(
   if (sub.canSpawn)
     constraints.push(
       `可以用 agent.spawn 把彼此独立的有界子目标交给子会话（同时最多 ${sub.maxConcurrent} 个，派生层数上限 ${sub.maxDepth}）；` +
-        "子会话的能力、模式与预算都不会超过本会话，且会占用本会话预算；派生后用 agent.await 等结果再汇总，不要为小事派生。",
+        "子会话的能力、模式与预算都不会超过本会话，且会占用本会话预算；budget 的每一项都必须小于本会话剩余预算（超过会被拒绝，不给则按剩余的一半划拨）；" +
+        "派生后用 agent.await 等结果再汇总，不要为小事派生。",
     );
   if (scope.capabilities.includes("web.search"))
     constraints.push(
@@ -506,6 +510,8 @@ export async function drive(
   } finally {
     clearInterval(watch);
     signal.removeEventListener("abort", abortOnce);
+    // 挂起等待(审批 / 选方案 / 子会话)时没有 run_completed 事件:把已用累计写回,等待期间界面照样显示 token / 费用
+    await persistUsage(ctx, runId, handle.stats().usage).catch(() => undefined);
     await liveRun.stop();
     await handle.close();
   }
@@ -543,6 +549,17 @@ export async function drive(
   }
 }
 
+/** 用量累计写回 agent_run.usage:按字段取较大值(重开会话后运行时计数可能从 0 开始,不能倒退) */
+export async function persistUsage(ctx: ServerContext, runId: string, usage: Record<string, unknown>) {
+  const nums = Object.fromEntries(Object.entries(usage).filter(([, v]) => typeof v === "number" && v > 0));
+  if (Object.keys(nums).length === 0) return;
+  await sql`
+    update agent_run set usage = coalesce(usage, '{}'::jsonb) || (
+      select coalesce(jsonb_object_agg(k, greatest(v::float8, coalesce((usage->>k)::float8, 0))), '{}'::jsonb)
+        from jsonb_each_text(${JSON.stringify(nums)}::jsonb) as n(k, v))
+     where id = ${runId}`.execute(ctx.db);
+}
+
 /** 等待目标关联的下载/入库落定:返回报告(state≠waiting)或 null(继续等) */
 export async function goalSettled(env: AgentEnv, runId: string, modelText: string): Promise<AgentGoalReport | null> {
   const r = await buildGoalReport(env.ctx.db, runId, modelText);