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feat(analytics): scan comparison mode for side-by-side evaluation (#7)#164

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feat(analytics): scan comparison mode for side-by-side evaluation (#7)#164
saidai-bhuvanesh wants to merge 8 commits into
jpdevhub:mainfrom
saidai-bhuvanesh:feat/scan-comparison

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@saidai-bhuvanesh

@saidai-bhuvanesh saidai-bhuvanesh commented Jul 3, 2026 •
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🔗 Upstream Issue Connection

Closes #163

This Pull Request is officially linked to and resolves Issue #163 (Feature 7: Scan Comparison Mode for Side-by-Side Analysis) 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.

What changes are made?

  1. Toglable Compare Mode (src/pages/ResultsPage.tsx): Added a comparison mode toggle button to the Results/History page headers.
  2. Interactive Selection Checklist: When Comparison Mode is active, clicking a scan item toggles its checkbox selection instead of navigating immediately.
  3. Pulsing Neon Float Bar: Built a floating trigger bar that slides up from the viewport bottom when scans are selected, prompting the user to select exactly 2 scans.
  4. Side-by-Side Comparison Overlay Modal: Clicking "COMPARE NOW" fetches full biomarker data for both selected scans using Promise.all and opens a detailed comparative overlay modal.
  5. Detailed Comparative Breakdown: Renders comparative progress bars for each biomarker (gills, eyes, scales), displays the delta variance percentage, and presents recommendations.
  6. I18n Localization: Translated comparison control buttons, selection status, modal labels, and variance results to English, Hindi, and Bengali locales.

Technical Depth and Verification

We implemented a robust selection buffer that limits checkboxes to exactly two items. The overlay fetches full biomarker records in parallel using Promise.all to minimize request latency. The variance engine computes the absolute difference between freshness indexes and displays a descriptive delta summary dynamically in the modal.

Verified on the History page. Toggling compare mode enables checkbox selection. Selecting two scans opens the modal, rendering side-by-side grids and correct decay differences.

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Someone is attempting to deploy a commit to the karan3431's projects Team on Vercel.

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📥 Commits

Reviewing files that changed from the base of the PR and between 97c6f33 and 8f2db4c.

📒 Files selected for processing (13)
  • 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/ResultsPage.tsx
  • src/pages/ScannerPage.tsx
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⚠️ No linked issue found!
This PR cannot be reviewed until a related issue is linked.
Please add Closes #issue_number in your PR description.

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Feature 7: Scan Comparison Mode for Side-by-Side Analysis

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