feat: implement file deletion functionality and enhance deployment script

frontend/lib/store.ts

@@ -92,3 +92,16 @@ export function getUploadPath(token: string, originalName: string): string {
   return path.join(UPLOADS_DIR, token, originalName)
 }
 
+export async function deleteFile(token: string): Promise<void> {
+  await ensureReady()
+  const record = await getFile(token)
+  if (!record) throw new Error('File not found')
+
+  // Remove from DB first
+  await getDb().execute({ sql: 'DELETE FROM files WHERE token = ?', args: [token] })
+
+  // Remove upload directory (best-effort — don't fail if already gone)
+  const dir = path.join(UPLOADS_DIR, token)
+  await fs.rm(dir, { recursive: true, force: true })
+}
+