fix: loyalty points awarded 100x lower than configured POINTS_PER_RUPEE (#5983)

[adrika4]

📋 Summary

Fixes loyalty points calculation so customers are awarded the correct
number of points per rupee spent, instead of 100x fewer than configured.

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🔗 Related Issue

Closes #5983

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🔄 Type of Change

• Bug fix
• New feature
• Documentation update
• Style / UI improvement
• Refactor
• Test
• Chore / dependency update

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🛠️ What Was Changed

• Corrected the loyalty points calculation in checkout.js so it matches the configured POINTS_PER_RUPEE value
• Points awarded per order now reflect the intended rate instead of being scaled down by 100x

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why this needed

• Customers were being under-rewarded, receiving 100x fewer loyalty points than the configured rate intended
• This directly affects redemption value and customer trust in the loyalty program

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🧪 How Has This Been Tested?

• Ran frontend locally with npm run dev
• Ran npm run lint — no errors
• Ran npm run build — no errors
• Uploaded a test document and verified output
• Tested on mobile view

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✅ Self-Review Checklist

• My branch name follows the convention (feat/, fix/, docs/)
• My commit messages follow the convention (feat:, fix:, docs:)
• I have linked the related issue (Closes #IssueNumber)
• I have tested my changes locally
• I have added screenshots for UI changes
• My changes do not break existing functionality
• I have not pushed any .env file or API keys
• My PR contains only changes related to the linked issue

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📋 Additional Notes

None.

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