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/schedules/interval-select.tsx

@@ -0,0 +1,65 @@
+import type { ScheduleSpec, ScheduleSpecInput } from "@umt/contracts";
+import { useState } from "react";
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "~/components/ui/select.tsx";
+import { IntervalEditor } from "./interval-editor.tsx";
+import { describeSchedule, INTERVAL_PRESETS } from "./labels.ts";
+
+const CUSTOM = "custom";
+
+/**
+ * 间隔就地改:常用选项下拉,最后一项"自定义…"切到数字 + 单位输入。
+ * cron 调度没有下拉,直接用 IntervalEditor 改表达式。
+ */
+export function IntervalSelect({
+  schedule,
+  disabled,
+  pending,
+  onSave,
+  label,
+}: {
+  schedule: ScheduleSpec;
+  disabled?: boolean;
+  pending?: boolean;
+  onSave: (next: ScheduleSpecInput) => void;
+  /** 无障碍名:"<任务名>间隔" */
+  label: string;
+}) {
+  const [custom, setCustom] = useState(false);
+  if (schedule.type === "cron" || custom)
+    return (
+      <IntervalEditor
+        schedule={schedule}
+        disabled={disabled}
+        pending={pending}
+        onSave={onSave}
+        defaultEditing={custom}
+        onClose={() => setCustom(false)}
+      />
+    );
+  const current = String(schedule.everyMs);
+  const options = INTERVAL_PRESETS.includes(schedule.everyMs)
+    ? INTERVAL_PRESETS
+    : [...INTERVAL_PRESETS, schedule.everyMs].sort((a, b) => a - b);
+  return (
+    <Select
+      value={current}
+      disabled={disabled || pending}
+      onValueChange={(v) => {
+        if (v === CUSTOM) setCustom(true);
+        else if (v !== current) onSave({ type: "interval", everyMs: Number(v) });
+      }}
+    >
+      <SelectTrigger size="sm" className="h-8 w-32 text-caption" aria-label={label}>
+        <SelectValue />
+      </SelectTrigger>
+      <SelectContent position="popper">
+        {options.map((ms) => (
+          <SelectItem key={ms} value={String(ms)}>
+            {describeSchedule({ type: "interval", everyMs: ms })}
+          </SelectItem>
+        ))}
+        <SelectItem value={CUSTOM}>自定义…</SelectItem>
+      </SelectContent>
+    </Select>
+  );
+}