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/routes.ts

@@ -15,6 +15,8 @@ export default [
       route("identity", "routes/console/identity.tsx"),
       route("organize", "routes/console/organize.tsx"),
       route("organize/:id", "routes/console/organize.$id.tsx"),
+      route("files", "routes/console/files.tsx"),
+      route("files/trash", "routes/console/files.trash.tsx"),
       route("subscriptions", "routes/console/subscriptions.tsx"),
       route("preferences", "routes/console/preferences.tsx"),
       route("sites", "routes/console/sites.tsx"),