feat: add Contribution Velocity Predictor dashboard

[saidai-bhuvanesh]

🚀 [Feature] Contribution Velocity Predictor Dashboard

🎯 Objective

This PR introduces an enterprise-grade Contribution Velocity Predictor system designed to provide AI-powered contributor forecasting, momentum analytics, OSS growth intelligence, and realtime developer activity prediction inside the DevCard analytics ecosystem.

The implementation significantly expands the existing GitHub Analytics Command Center with advanced visualization infrastructure, predictive contribution insights, and custom SVG-powered analytics systems built entirely using lightweight native Svelte 5 rendering.

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✨ Features

• AI-powered contribution velocity scoring
• Contribution forecasting analytics
• OSS growth prediction system
• Momentum intelligence insights
• Realtime contributor activity heatmap
• Advanced SVG radar analytics
• Interactive contribution trend visualization
• Enterprise analytics dashboard infrastructure
• Zero-dependency chart rendering
• Responsive analytics layouts
• Accessibility-safe visualization system
• Glassmorphism-inspired enterprise UI

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🏗️ Technical Implementation

Added Components

• ActivityHeatmap.svelte
• AnalyticsWidget.svelte
• ContributionForecastChart.svelte
• ContributionRadar.svelte
• GrowthRadar.svelte
• MomentumInsights.svelte
• OSSImpactGraph.svelte
• ReputationScoreCard.svelte
• VelocityScoreCard.svelte

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Dashboard Expansion

Enhanced:

• apps/web/src/routes/dashboard/+page.svelte

The dashboard now includes:

• AI reputation systems
• contribution forecasting
• contributor momentum prediction
• growth radar analytics
• OSS impact visualization
• realtime activity intelligence

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🛡️ Architecture Safety

• Frontend-only implementation
• Zero backend schema modifications
• No API contract changes
• No authentication flow modifications
• No database changes introduced
• No routing architecture rewrites
• Fully isolated analytics infrastructure
• Minimal merge conflict probability
• Reusable modular component system preserved

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⚡ Performance Optimizations

• Zero heavy charting libraries used
• Native SVG rendering infrastructure
• Lightweight reactive calculations
• Optimized Svelte 5 rendering flows
• Reduced unnecessary rerenders
• Efficient visualization rendering
• Responsive layout optimization
• Minimal DOM recalculations

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♿ Accessibility Improvements

• Added semantic interactive analytics elements
• Keyboard-accessible SVG interactions
• aria-label support for visualizations
• Improved screen-reader compatibility
• Accessible hover/focus interaction patterns
• WCAG-friendly visualization rendering

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🧠 Svelte 5 Modernization

Implemented using modern Svelte 5 APIs:

• $props()
• $state()
• $derived()

Additional improvements:

• Removed dependency on heavy external visualization packages
• Improved component isolation
• Preserved reusable analytics infrastructure
• Maintained modern reactive rendering patterns

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🧪 Validation

✔ pnpm check passed successfully
✔ pnpm build passed successfully
✔ Svelte 5 compatibility verified
✔ SVG rendering validated locally
✔ Responsive dashboard layouts verified
✔ Accessibility interaction flows tested
✔ Zero TypeScript compilation issues
✔ No backend regressions introduced

✅ Checklist

• Code follows repository guidelines
• Self-review completed
• Build verification completed
• Frontend-only architecture preserved
• No unrelated modifications included
• Accessibility-safe rendering verified
• Modern Svelte 5 APIs used correctly
• Zero-dependency visualization infrastructure maintained
• Enterprise dashboard consistency preserved
• Reusable analytics component architecture maintained

[saidai-bhuvanesh]

Applied a complete frontend architecture hardening pass including reusable visualization extraction, accessibility improvements, security-safe rendering updates, performance optimizations, duplicate rendering cleanup, and reusable analytics infrastructure stabilization.