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]>

3 files changed, 33 insertions, 0 deletions

diff --git a/frontend/app/api/directories/route.ts b/frontend/app/api/directories/route.ts
new file mode 100644
index 0000000..b3515bb
--- /dev/null
+++ b/frontend/app/api/directories/route.ts
@@ -0,0 +1,16 @@
+import { NextResponse } from 'next/server'
+import { Drive_ls_directories } from '@/lib/drive_server'
+
+export async function GET() {
+  try {
+    const directories = await Drive_ls_directories()
+    
+    return NextResponse.json(directories)
+  } catch (error) {
+    console.error('Error fetching directories:', error)
+    return NextResponse.json(
+      { error: error instanceof Error ? error.message : 'Internal server error' },
+      { status: 500 }
+    )
+  }
+}
\ No newline at end of file
diff --git a/frontend/app/v2/[...path]/page.tsx b/frontend/app/v2/[...path]/page.tsx
new file mode 100644
index 0000000..4af0167
--- /dev/null
+++ b/frontend/app/v2/[...path]/page.tsx
@@ -0,0 +1,12 @@
+import { V2DirectoryView } from "@/components/v2/V2DirectoryView"
+
+export default async function V2DirectoryPage({
+  params,
+}: {
+  params: Promise<{ path: string[] }>
+}) {
+  const { path: pathSegments } = await params
+  const currentPath = '/' + (pathSegments?.join('/') || '')
+
+  return <V2DirectoryView path={currentPath} />
+}
\ No newline at end of file
diff --git a/frontend/app/v2/page.tsx b/frontend/app/v2/page.tsx
new file mode 100644
index 0000000..e693c77
--- /dev/null
+++ b/frontend/app/v2/page.tsx
@@ -0,0 +1,5 @@
+import { V2DirectoryView } from "@/components/v2/V2DirectoryView"
+
+export default function V2RootPage() {
+  return <V2DirectoryView path="/" />
+}
\ No newline at end of file