- new rx_group_delete(int rxId) method in Opd_prescription controller
- deletes linked medicines first (opd_prescrption_prescribed_template), then group row
- POST route: Opd_prescription/rx_group_delete/(:num)
- Delete button (red) added to each row in Rx-Group list table
- confirm dialog before delete (shows group name)
- reloads list after delete; clears form if deleted group was loaded
- consult form medicine Dose/When/Freq changed to dropdowns from dose masters
- added Where dropdown in consult medicine editor and table display
- consult now loads options from Opd_prescription/rx_group_dose_masters
- medicine add/update payload now includes dosage_where
- medicine list now returns dosage_where_label for readable table output
- edit mode supports existing values not present in current master set
- quick chips now map into select options (with safe fallback)
