# Changelog

## [2025-09-23] - Overlay Filesystem Removal

### Removed
- **Overlay filesystem functionality**: Removed unused overlay filesystem features
  - Removed `OVERLAY_ENABLED` and `OVERLAY_PROTECT_CONFIGS` from configuration
  - Removed `overlayfs` sections from all profile JSON files
  - Removed overlay references from documentation and scripts
  - Added overlay detection and removal functionality for existing mounts

### Added
- **Overlay cleanup functionality**: Added ability to detect and remove overlay mounts
  - `remove_overlays()` function to safely unmount overlay filesystems
  - Automatic cleanup of overlay work/upper directories
  - Removal of overlay entries from /etc/fstab
  - User prompt when overlay mounts are detected

### Rationale
- Overlay filesystems are complex and rarely needed on desktop systems
- Most users benefit more from tmpfs cache optimization than overlay complexity
- Simplified codebase by removing unused/incomplete functionality

## [2025-09-23] - tmpfs Setup Fix

### Fixed
- **one-button-optimizer.sh**: Fixed critical issue where tmpfs setup was not working
  - Added missing `setup_tmpfs()` function that was referenced but not implemented
  - Enhanced tmpfs analysis to actually scan system for cache directories 
  - Added intelligent profile recommendation based on RAM size and existing cache data
  - Fixed tmpfs persistence by generating proper fstab entries
  - Updated systemd service to restore tmpfs mounts after reboot

### Enhanced
- **tmpfs Analysis**: Now scans for actual cacheable data:
  - Browser caches (Chrome, Firefox, Chromium)
  - Package caches (/var/cache/apt)
  - Temporary files
  - Shows actual cache sizes and provides intelligent recommendations

### Technical Details
- **Issue**: When users selected "yes" for tmpfs setup, nothing happened because the `setup_tmpfs` function was missing
- **Root Cause**: The function was called in main() but never defined
- **Solution**: Implemented complete tmpfs setup with intelligent sizing and persistence

### Testing
- Added test script (`test-tmpfs-fix.sh`) to verify functionality
- Confirmed syntax validation passes
- Verified tmpfs analysis logic works correctly

## Previous versions
- Initial implementation with zram, kernel tuning, and basic tmpfs detection