Resolve "fix: remove minimum count for book no in patient profile in admin page"

What does this MR do and why?

This MR fixes an issue in the Admin → Patient Profile search where the search button was disabled for any input with less than 2 characters.

Previously, the minimum 2-character validation was applied to all search types, including book number search. This prevented users from searching single-digit book numbers (e.g., 1, 2, 3).

✅ Changes Made

Updated the disabled condition in PatientSearch.tsx.

The 2-character minimum restriction now applies only to phone/name searches.

Book number searches can now be performed with single-digit values.

🎯 Why?

Book numbers can be single-digit. Restricting the search to minimum 2 characters was incorrect and blocked valid searches.

References

Closes #175 (closed)

Before:

Search button disabled when entering single-digit book number (e.g., 1) Minimum 2-character rule applied to all search types

After:

Search button enabled for single-digit book number Minimum rule applied only for phone/name search

Navigation: Admin → Patient Profile

MR acceptance checklist

Bug fix does not break existing functionality

Validation logic updated correctly

No UI layout changes introduced

Code follows project conventions

Tested locally

Single-digit book number search verified