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/inbox.tsx

@@ -21,7 +21,7 @@ import { errorMessage } from "~/lib/api.ts";
 import { useSse, useSseStatus } from "~/lib/sse.ts";
 import { formatDateTime } from "~/lib/utils.ts";
 
-// 待处理中心(REQ §13.1):按作品与问题类型合并;每项给证据、建议、影响范围与预览;
+// 待处理(REQ §13.1):按作品与问题类型合并;每项给证据、建议、影响范围与预览;
 // 处理选项来自后端 decision.options;SSE 收到 decision.* 事件即刷新。
 
 const OPEN: DecisionStatus[] = ["open", "investigating", "awaiting_user"];
@@ -276,7 +276,7 @@ export default function InboxPage() {
   return (
     <>
       <PageHeader
-        title="待处理中心"
+        title="待处理"
         description="Agent 调查和重试后仍未解决的事项,按作品和问题类型合并"
         actions={
           <>