Redesign & bug fixe: streak, Calendar, Home

[FalkenDev]

• Streak bug fixes: Deleted activity logs and finished workout sessions now correctly decrement the streak counter. Previously, removing a session would leave the home page showing the old (higher) pass count. Abandoned ("avbruten") sessions no longer count toward weekly milestone progress.
• Calendar redesign: Improved empty state handling, streak freeze UI, button styling, and accurate freeze count display.
• Home page redesign: Simplified layout, improved streak display, added weekly training time, and expanded ProgressBar with streak info.
• MyWorkouts: Shows more workouts with updated styling.
• Statistics: Minor tab styling improvements and "Your Training" section title.
• Safe migration: AddRoleToUser migration now guards against re-running on an existing column.
• Dependency cleanup: Downgraded prettier-eslint to 16.3.0 for compatibility; removed deprecated WorkoutDetailsOld route and page.

Bug fixes

• Streak count stays stale after deleting a session — fixed by decrementing currentStreak on deletion (finished sessions and activity logs only)
• Abandoned sessions counted toward "X left to next milestone" — fixed by filtering status: 'finished' in countTotalSessionsWithActivity()
• Calendar freeze count showing wrong number — fixed