Fixed issue where ImportDialog was being rendered for each track in waveform mode, causing multiple unclosable dialogs to appear on page load. Changes: - Moved ImportDialog to renderControlsOnly mode only - Each track now has exactly one ImportDialog (rendered in controls column) - Removed duplicate ImportDialog from renderWaveformOnly mode - Removed ImportDialog from fallback return statement This ensures only one dialog appears per track, making it properly closable. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>