fix(prescriptions): fix days and quantity field handling when adding new prescriptions

Summary

Fixes issues in the Update Prescription flow related to days and quantity input handling.

Problem

• Quantity field defaulted to 1, causing digit concatenation (e.g. typing 20 resulted in 120)
• Invalid prescriptions could be submitted due to missing validation
• No Validation Alerts
• For the Medicines like Syrups , Gel, Ointment, Cream, Lotions the quantities are calculated incorrectly.
• No Doctor names for the prescriptions and Consultations
• No Grouping of the medicines in the Manage Prescriptions

What Changed

• Fixed quantity input to allow clean numeric entry
• Removed silent default values for days and quantity
• Updated Days Field Min: 1, Max: 31
• Added Quick Days Access Buttons 7 10 15 31
• Added Dosage button to choose between the Full Dosage or Half Dosage
• Added Validation Alerts
• Changed the buttons names -
• Converted prescription logic to:
  • One prescription = multiple medicines
• Medicines are now grouped and submitted as a single prescription batch
• Added automatic handling for manual-quantity medicine types:
  • Syrup
  • Gel
  • Ointment
  • Cream
  • Lotion -(Directly redirect to By Quantity)
• Improved dosage calculation:
  • quantity = days × time slots
  • Half dosage = ceil(total / 2)
• Updated layout:
  • Days, Dosage, and Calculated Quantity appear in one row
• Doctor name now displayed in consultation list and Prescriptions
• Mobile Friendly

##Images

1. Display the Doctor Names in the Consultations

2. Added Quick Days Selection, Dosage Button.

3. Multiple Medicines are displayed in a single form in the Manage Prescriptions

4. Mobile View

Behavior

• By Dosage: Quantity is auto-calculated from days × time slots
• By Quantity: Only total quantity is required (days and time slots are hidden)
• For Syrups, Gels, Ointment can only be added By Quantity not by Dosage, when these types of medicines are selected it redirects to By Quantity