Improved Roster Calendar Arrows, Cleaner Layout, and Smarter Date Jumping

Just released, some improvments to the Roster view:

• Calendar navigation now shows separate buttons for moving by month or by week, with clearer “Month”/“Week” arrows on both sides.
• Jump-to-date dropdown and view toggles tightened for a bit less horizontal space, but behaviour unchanged.
• Forward/back logic adjusted so week/month jumps honor actual week starts and month boundaries; you’ll still get the same plan-limit warnings if you go too far.