Improvements and fixes

Added

• Added login button to SAAS home page that redirects to signin screen or app root based on authentication status
• Added SessionProvider to SAAS layout to support authentication state across SAAS pages
• Added pre-commit hooks with husky and lint-staged to run linting and type checking before commits

Changed

• Removed Settings option from the main navigation bar since it's already available in the user dropdown menu
• Improved dark mode by replacing black with dark gray colors for better visual comfort and reduced contrast

Fixed

• Fixed event title alignment in calendar events to be top-aligned instead of vertically centered
• Removed minimum height constraint for all-day events in WeekView and DayView components to improve space utilization
• Made EventModal and TaskModal content scrollable on small screens to ensure buttons remain accessible