feat(web): regroup console nav into 7 groups, split downloads/plans/tasks, add legacy redirects

- Sidebar: 概览/资源/订阅/下载/整理/Agent/系统, 18 items (+ 定时任务); single
  active item via findNavItem; 待处理 badge; collapsed rail groups; mobile drawer
  shares NAV_GROUPS.
- New pages: /downloads (queue + cache watermark header), /downloads/plans,
  /downloads/:id, /tasks (business tasks only) + /tasks/:id detail, /rules.
- Legacy links: ?tab= on tasks/subscriptions/sources redirect via clientLoader;
  /tasks/:downloadId falls back to /downloads/:id.
- List filters in URL query; settingsPath() helper for settings deep links.
- Copy per glossary (待处理, 收录策略, 引擎面板, 文件管理, 版本目标).

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

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

@@ -2,7 +2,7 @@ import { useQueryClient } from "@tanstack/react-query";
 import type { EngineRun } from "@umt/contracts";
 import { Ban, CheckCircle2, Clock, Cpu, LoaderCircle, RotateCw, XCircle } from "lucide-react";
 import { useEffect, useRef, useState } from "react";
-import { useNavigate, useSearchParams } from "react-router";
+import { Link, useNavigate, useSearchParams } from "react-router";
 import { useEngineRuns, useEngineStats } from "~/api/engine.ts";
 import { DataTable } from "~/components/console/data-table.tsx";
 import { FilterBar, FilterSelect } from "~/components/console/filter-bar.tsx";
@@ -15,7 +15,7 @@ import { engineRunLabel, formatDuration, formatRelative, spanSec as runDurationS
 import { qk } from "~/lib/query-keys.ts";
 import { useSse } from "~/lib/sse.ts";
 
-export const meta = () => [{ title: "工作流引擎 · UHD 媒体自动化控制台" }];
+export const meta = () => [{ title: "引擎面板 · UHD 媒体自动化控制台" }];
 
 const STAT_ORDER = [
   { status: "pending", label: "待执行", icon: Clock, tone: "neutral" },
@@ -95,8 +95,15 @@ export default function EnginePage() {
   return (
     <>
       <PageHeader
-        title="工作流引擎"
-        description="引擎的运行记录，只读。业务进度看「下载与任务」。"
+        title="引擎面板"
+        description={
+          <>
+            排查用,只读。业务进度看
+            <Link to={consolePath("tasks")} className="mx-1 underline underline-offset-4">
+              业务任务
+            </Link>
+          </>
+        }
         actions={
           <Button
             variant="outline"