feat(web): W5-B file manager page /console/files

Roots + lazy dir tree, virtualized grid with status badges and asset/slot/
download links, breadcrumb, sort, glob search, hidden toggle, filter chips,
paging and truncation notice; multi-select (Shift/Ctrl/all), action bar,
context menu, drag-to-move with dryRun preview, keyboard navigation,
offline (503) and empty/error states, mobile layout with tree drawer.
Rename/move/copy/delete dialogs with dryRun previews and reference checks,
4-step organize wizard, trash view (restore/restore-to/purge, expiry).
DEV-only ?mock=1 in-memory backend; smoke route list includes /console/files.

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

apps/web/app/components/console/nav.ts

@@ -5,6 +5,7 @@ import {
   Download,
   FileStack,
   Fingerprint,
+  FolderTree,
   Globe,
   House,
   Inbox,
@@ -63,6 +64,12 @@ export const NAV_GROUPS: NavGroup[] = [
         icon: FileStack,
         description: "Copy/Move 入库前后路径与逐文件结果",
       },
+      {
+        to: "/console/files",
+        label: "文件",
+        icon: FolderTree,
+        description: "浏览已登记的库根与下载目录,改名、移动、删除与批量整理",
+      },
     ],
   },
   {