Version 2.0.5

v2.0.5
✅ Calculator UI redesigned — traditional 5-column layout with dark theme (sin, cos, tan rows + reciprocal functions cosec, sec, cot)
✅ Auto-bracket closing for functions — typing tan60 now auto-wraps as tan(60) when function button is tapped; closing bracket added automatically on = or operator tap
✅ Live preview with implicit brackets — unclosed function brackets like tan(60 now show live preview result without user needing to manually close bracket
✅ Memory operations — M+, M−, MR buttons fully functional
✅ Settings "Check for Updates" button — links directly to GitHub Releases for easy APK downloads
✅ Deg/Rad toggle — embedded in scientific keypad, both modes tested and working
✅ Comprehensive Calculator testing checklist — 50+ test cases covering trig, roots, logs, parentheses, memory, and edge cases