Implement /v2 prototype UI with page-based navigation

- Add /v2 route structure with dynamic nested directory pages
- Create V2DirectoryView component with breadcrumb navigation
- Add V2MoveDialog with directory search and flat list display
- Implement single upload button for current directory context
- Add /api/directories endpoint for move dialog directory picker
- Fix breadcrumb decoding to show readable names instead of URL encoding
- Add file sorting: directories first, then files, all alphabetically
- Improve performance by loading only current directory contents
- Add ScrollArea component and @radix-ui/react-scroll-area dependency
- Ensure proper URL encoding/decoding flow to prevent malformed paths

🤖 Generated with [Claude Code](https://claude.ai/code)

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

1 files changed, 1 insertions, 0 deletions

diff --git a/frontend/package.json b/frontend/package.json
index d7922cf..d3762a2 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -14,6 +14,7 @@
     "@radix-ui/react-dropdown-menu": "^2.1.15",
     "@radix-ui/react-label": "^2.1.7",
     "@radix-ui/react-progress": "^1.1.7",
+    "@radix-ui/react-scroll-area": "^1.2.1",
     "@radix-ui/react-slot": "^1.2.3",
     "@radix-ui/react-toast": "^1.2.14",
     "class-variance-authority": "^0.7.1",