Tasks: Fix macOS Login Input Field Visibility

Implementation Tasks

1. [x] Update username Entry widget styling (image_generator.py:162-168)

   • Add bg='#fafafa' parameter to Entry constructor
   • Add fg='#000000' parameter for text color
   • Add insertbackground='#000000' for cursor visibility
   • Validation: Run app on macOS and verify username field is visible and accepts input

2. [x] Update password Entry widget styling (image_generator.py:181-188)

   • Add bg='#fafafa' parameter to Entry constructor
   • Add fg='#000000' parameter for text color
   • Add insertbackground='#000000' for cursor visibility
   • Ensure show='*' behavior is preserved
   • Validation: Run app on macOS and verify password field is visible with masked characters

3. [x] Update password placeholder handling (image_generator.py:192-194)

   • Verify placeholder color fg='#999999' still contrasts properly with new background
   • Test that placeholder clearing on first keystroke (lines 243-249) works correctly
   • Validation: Test "remember password" flow with placeholder display

4. [ ] Cross-platform visual verification

   • Test on macOS (primary target)
   • Test on Windows (ensure no regression)
   • Test on Linux if available (ensure no regression)
   • Validation: Input fields should be clearly visible on all platforms with good contrast

5. [ ] User interaction testing

   • Test typing in username field
   • Test typing in password field
   • Test tab navigation between fields
   • Test cursor visibility in both fields
   • Test password reveal/mask behavior
   • Validation: All keyboard interactions work smoothly with visible feedback

Dependencies

• None - tasks can be completed sequentially in order

Notes

• Tasks 1-3 can be done in a single code edit
• Task 4-5 require manual testing after code changes