Implement unit converter with Length, Temperature, and Weight categories

[Shaily-62]

Issues: Unit Converter — length, temperature, and weight (bi-directional) #164

✨ Summary

Added a responsive unit converter web app supporting Length, Temperature, and Weight conversions with instant bi-directional updates.

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🧩 Details / Implementation

• Added category selector with options:
  • Length: m, km, mi, ft
  • Temperature: °C, °F, K
  • Weight: g, kg, lb, oz
• Implemented dual synchronized input fields
• Added Swap Units button for direction reversal
• Applied rounding to max 6 decimals (trims trailing zeros)
• Designed a mobile-friendly, responsive layout using flex
• Included modular conversion utility functions

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📁 Files Changed

• projects/unit-converter/index.html
• projects/unit-converter/styles.css
• projects/unit-converter/main.js

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✅ Acceptance Criteria

Criteria	Status
Length (m, km, mi, ft) conversions work	☐
Temperature (C, F, K) conversions work	☐
Weight (g, kg, lb, oz) conversions work	☐
Swap button reverses direction correctly	☐
Proper rounding and trailing zero trimming	☐
Mobile-friendly and responsive layout	☐

Check each item once verified before merging.

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🧪 How to Test

1. Open index.html in a browser.
2. Select a category (Length, Temperature, or Weight).
3. Enter a value in either input and confirm the other updates.
4. Use the “Swap” button and verify values flip correctly.
5. Test on mobile or smaller screens to confirm responsiveness.

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📸 Screenshots

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📸 Demo

Unit.Converter.and.2.more.pages.-.Personal.-.Microsoft_.Edge.2025-10-27.15-57-29.1.mp4

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