feat(web): split plan page from tasks (FE-6)

- Nav overview group: 首页 / 任务 / 计划 / Agent 会话; tasks page drops the plan tab
- /console/tasks?tab=plan[&job=] redirects to /console/schedules[?job=]
- Plan page: 自动任务 compact grouped list (switch, interval preset/custom, last result,
  countdown, failure reason, run now/skip/run records) and Agent 巡检 cards (goal,
  allowlist, budget, upstream/model, trigger, cost per run, recent sessions); split stats
- Home plan band: two counts linking to #auto / #checks
- Docs: console-ia §7.4a, glossary, schedules runbook; smoke routes

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

apps/web/app/components/tasks/labels.ts

@@ -117,7 +117,7 @@ export function businessLink(b: EngineRun["business"], input?: unknown): { to: s
     case "agent":
       return { to: `/console/agent/${id}`, label: "Agent 会话" };
     case "schedule":
-      return { to: `/console/tasks?tab=plan&job=${id}`, label: "定时任务" };
+      return { to: `/console/schedules?job=${id}`, label: "定时任务" };
     case "feed":
       return { to: consolePath("sources"), label: "Feed" };
     case "site":