implement 1/N categorical pricing logic and real-time chart synchronization

Issue #57 | State: OPEN | Created: 2026-01-15T09:30:30Z

Assignees: Abdulkarim4u

Updated: 2026-01-16T00:19:16Z | Closed: N/A

Logic & Backend:

• Fixed categorical market "50% default" bug by implementing 1/N starting probability logic.
• Updated BatchProcessor and seeding scripts to ensure market sums equal 100% on launch.
• Implemented recursive price lookback logic in PriceHistoryService to prevent 0¢ chart drops. Frontend & UI/UX:
• Implemented "Perfect Sync" charts: injected synthetic start and live data points to ensure historical lines are always visible and in sync with header percentages.
• Added dynamic price movement labels (↑/↓) showing real-time gains/losses relative to launch price.
• Refined ChartTooltips and legends to show professional dollar volume and live prices.
• Patched homepage "No" buttons to correctly initiate BUY orders instead of SELL. Documentation:
• Added comprehensive design document in /docs/task/design.
• Added industry-standard charts testing plan in /docs/test.