v1.7.1 - Calendar Parsing Fix

🐛 Bug Fixes

• Fixed octal number parsing error in calendar duration calculations that caused crashes when processing events with times like 09:XX
• Calendar table now displays correctly without errors

🔧 Technical Details

• Replaced ${hours * 60 + minutes} with $(( 10#$hours * 60 + 10#$minutes )) to force base-10 interpretation
• Affects duration calculations in lib/calendar.sh lines 319 and 423
• Fixes error: 09: value too great for base (error token is "09")

Full Changelog: v1.7.0...v1.7.1