feat(schedules): per-check cost and model summary on GET /schedules (INT-3)

agent_check items carry agentRuns (last 100 sessions: last/avg cost, 7-day count and cost,
models, recent 3); plan page and home plan band use it instead of fetching agent runs.
Migration 0052 indexes agent_run(created_by, created_at).

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

apps/web/app/routes/console/home.tsx

@@ -22,7 +22,6 @@ import type { ReactNode } from "react";
 import { useRef } from "react";
 import { Link } from "react-router";
 import { toast } from "sonner";
-import { useScheduleAgentRuns } from "~/api/agent.ts";
 import { useDashboard, useSitesWithAccounts } from "~/api/dashboard.ts";
 import { useDecisions } from "~/api/decisions.ts";
 import { useEngineRunsPage, useEngineStats } from "~/api/engine.ts";
@@ -36,7 +35,7 @@ import { StatTile } from "~/components/console/stat-tile.tsx";
 import { StatusBadge, type StatusTone } from "~/components/console/status-badge.tsx";
 import { useVolumeLabel } from "~/components/downloads/cache-volumes.tsx";
 import { formatUsd, planPath } from "~/components/schedules/labels.ts";
-import { planStats, useLiveSchedules, useNow } from "~/components/schedules/schedule-board.tsx";
+import { planStats, useLiveSchedules } from "~/components/schedules/schedule-board.tsx";
 import { engineRunStatus, runTitle, workflowLabel } from "~/components/tasks/labels.ts";
 import { useLiveTasks } from "~/components/tasks/task-stream.tsx";
 import { Button } from "~/components/ui/button.tsx";
@@ -353,13 +352,7 @@ function Num({ children, tone }: { children: ReactNode; tone?: "destructive" })
 
 function PlanStrip() {
   const board = useLiveSchedules();
-  const runs = useScheduleAgentRuns();
-  const now = useNow(60_000);
-  const s = planStats(
-    board.data?.items ?? [],
-    (runs.data ?? []).map((r) => ({ at: r.createdAt, cost: r.usage.costUsd })),
-    now,
-  );
+  const s = planStats(board.data?.items ?? []);
   return (
     <Section
       title="计划"
@@ -388,7 +381,7 @@ function PlanStrip() {
               启用 <Num>{s.checks.enabled}</Num> / {s.checks.total}
             </span>
             <span title="近 7 天巡检会话费用合计">
-              近 7 天 <Num>{runs.isPending ? "…" : runs.isError ? "—" : formatUsd(s.checks.weekCost)}</Num>
+              近 7 天 <Num>{formatUsd(s.checks.weekCost)}</Num>
             </span>
           </PlanCount>
         </div>