Replace 6 bare `except:` blocks with targeted exception types:
- logo_downloader.py: OSError for file removal, (OSError, IOError) for font loading
- layout_manager.py: (ValueError, TypeError, KeyError, IndexError) for format string
- app.py: (OSError, ValueError) for CPU temp, (SubprocessError, OSError) for systemctl, (KeyError, TypeError, ValueError) for config parsing
Co-authored-by: 5ymb01 <5ymb01@users.noreply.github.com>
Co-authored-by: 5ymb01 <noreply@github.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>