Separate styling from tsx components

[lyannne]

ℹ️ Issue

Closes #280

📝 Description

1. Changed CSS styles at bottom of the file to Tailwind styling for Login.tsx, Register.tsx, and RegisterLanding.tsx.
2. Removed Account.tsx and Profile.tsx files since they were unused
3. Minor changes to GrantCalculations.text.tsx to fix an error I was getting with the structure of the data.
4. Added top margin to button on RegisterLanding.tsx for a better look.

✔️ Verification

N/A (pages look same as before)

Test Changes

N/A

🏕️ (Optional) Future Work / Notes

• For the Register page (Register.tsx), the height of the page shortened a bit when I changed the styles to Tailwind, but it shouldn't be noticeable.

[Copilot]

Pull request overview

This PR converts inline CSS styles to Tailwind classes for several authentication-related components, removes unused files, and fixes test data structure to match the actual implementation.

Changes:

• Converted inline styles to Tailwind classes in Login.tsx, Register.tsx, and RegisterLanding.tsx
• Removed unused Account.tsx and Profile.tsx files
• Fixed test assertions in GrantCalculations.test.tsx to match the actual data structure returned by the implementation

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
frontend/src/Login.tsx	Removed inline style object and converted styles to Tailwind classes
frontend/src/Register.tsx	Removed inline style object and converted error/warning styles to conditional Tailwind classes
frontend/src/RegisterLanding.tsx	Removed inline style object and converted to Tailwind classes, added margin to button
frontend/src/Account.tsx	Deleted unused component file
frontend/src/Profile.tsx	Deleted unused component file
frontend/tests/GrantCalculations.test.tsx	Fixed test expectations to match implementation's data structure with nested data property

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