feat(reputation): vendor reputation system with verified reports feed (#5)

[saidai-bhuvanesh]

🔗 Upstream Issue Connection

Closes #159

This Pull Request is officially linked to and resolves Issue #159 (Feature 5: Vendor Reputation System with Reviews & Verification) in the upstream repository.

Upon successful review, authorization, and merge, GitHub's integration will automatically close the linked issue. All development files, localization mappings, and page changes contained in this pull request directly address the requirements specified in the corresponding issue.

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What changes are made?

1. Interactive Detail Panel: Clicking any vendor in the Leaderboard page (src/pages/Leaderboard.tsx) now opens an interactive details drawer, presenting vendor trust scores, address, total scans, and trust status.
2. Verified Consumer Reports Feed: Added a verified reports feed for each vendor showing details of bought fish freshness or general feedback reports.
3. Reputation Submission Form: Integrated an interactive form in the drawer allowing consumers to report any freshness discrepancies or disputes.
4. Backend Review Endpoints (backend/vendors.py): Added GET /{vendor_id}/reviews and POST /{vendor_id}/reviews to list and create user reviews in an in-memory database fallback.
5. Robust Optional Authentication: Configured the POST review endpoint on the backend to dynamically parse credentials from Request headers and gracefully fallback to "Anonymous Consumer" if the user is unauthenticated, avoiding hard API crashes.
6. I18n Localization: Translated all new vendor detail headers, report submission text, and review elements to English, Hindi, and Bengali locales.

Technical Depth and Verification

The reputation system enhances marketplace integrity. The backend routes handle both authenticated and guest submissions, automatically assigning authorship based on JWT tokens or falling back to "Anonymous Consumer" securely. The leaderboard page now functions as a trust portal, loading historical verified reports dynamically when a vendor is selected.

Verified reviews submissions on the vendor details panel. Submitting ratings immediately updates the real-time list of reports, showing translated titles and dates correctly.

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📥 Commits

Reviewing files that changed from the base of the PR and between 97c6f33 and f13c8ea.

📒 Files selected for processing (12)

• backend/main.py
• backend/vendors.py
• src/components/AnalyticsTrends.tsx
• src/fusionInference.js
• src/i18n/locales/bn.json
• src/i18n/locales/en.json
• src/i18n/locales/hi.json
• src/lib/api.ts
• src/lib/offlineDb.ts
• src/pages/AnalysisDashboard.tsx
• src/pages/Leaderboard.tsx
• src/pages/ScannerPage.tsx

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