Preserve recommendation state after returning from project detail page

[jwalkorat]

Summary

Added recommendation state preservation when returning from a project detail page.

The selected form inputs are stored using sessionStorage and automatically restored when navigating back to the homepage.

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Related Issue

Closes #52

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Type of Change

• Bug fix
• Feature
• Data
• Documentation
• Style
• Refactor
• Test

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What Was Changed

File	Change made
static/script.js	Added sessionStorage restore logic for recommendations

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How to Test This PR

1. Run:
   python app.py

2. Open:
   http://127.0.0.1:5000

3. Fill the form and generate recommendations

4. Open any project page

5. Navigate back to the homepage

6. Verify:

   • form inputs are restored
   • recommendations reload automatically
   • page scrolls to recommendations section

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Test Results

Tested manually in browser.

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Self-Review Checklist

• Read CONTRIBUTING.md
• Used correct branch naming
• No debug statements added
• Only related files modified
• Tested on desktop and mobile

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Notes for Reviewer

None.

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