Redesigned Login Page for Apni Dukaan (#250)

[athalyeathu]

Fixes #250

Describe the changes you've made

• Fully redesigned login.html with semantic HTML5 structure.
• Added placeholder text, alt attributes, and required field validation.
• Cleaned up the layout using updated CSS (static/login.css).
• Validates email and password format using login.js.
• Improved accessibility and cross-browser compatibility.

Deployment Link

Please replace this with your GitHub Pages or Netlify link, if deployed.
Example: https://athalyeathu.github.io/Apni-Dukaan/login.html

Unusual Behavior

NA

Additional Context (Optional)

Redesign focuses on clarity, mobile responsiveness, and better error handling.

Checklist

• I have mentioned related issue number in PR description.
• I have added screenshots or related demo links.
• The title of my pull request is a short description of the requested changes.
• My code follows the code style of this project.
• I have not removed any existing features unintentionally.

[QAZIMAAZARSHAD]

The shared link is not working https://athalyeathu.github.io/Apni-Dukaan/login.html

If merging all changes in single PR close other PRs

and tag all related issues in PR description