[Feature]: Global Register Selection Setting

[anisharma07]

Description

• On the Home Page, the card only shows data from the currently active register.
• But on the Schedule Page, you can view schedules from multiple registers at once.

What Needs to Be Done

• Add a new global option in the Settings Page where users can:
  Select one, multiple, or all registers to include in their schedule view.

• Update the Home Page and Schedule Page to:
  Show schedule cards based on the selected registers from settings page (not just the active one).
  Merge schedules if multiple registers are selected.

This simplifies register selection by moving it to a single global setting, removing clutter from multiple pages and ensuring a consistent schedule view everywhere.

Additional Context

registerSelection.mp4

[FireFistisDead]

can you assign me this @anisharma07 @Irtesaam