feat: add savings projection API and dashboard UX states#751
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0xDeon
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Jun 27, 2026
0xDeon
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CI blocking merge: Dapp Frontend (Next.js) build failed and Security Scanning failed. Fix the frontend build errors and address the security scan findings before merging.
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Summary of Implementation
✅ Backend — Compound Interest Projection API
Implemented
Domain Model (
model.go)ProjectionInputwith validation for:ProjectionOutputwith timeline and summary statisticsCompoundFrequencyenum:Error handling for invalid inputs
Service Layer (
projection_service.go)ProjectionServicewith vault integrationCompoundInterestCalculatorimplementing the standard compound interest formulaAPY retrieval from vault performance data
Support for:
Handler Layer (
projection_handler.go)Implemented the following endpoints:
POST /api/v1/tools/projectionGET /api/v1/vaults/{id}/projectionAdditional functionality:
Unit Tests (
calculator_test.go)Added tests covering:
Features Delivered
✅ Daily and monthly compounding frequencies
✅ Optional recurring monthly contributions
✅ Vault-specific APY retrieval with override capability
✅ Monthly milestone timeline output
✅ Summary statistics:
✅ Input validation
✅ Clean architecture separation:
✅ Frontend — Dashboard UX States System
Implemented
Skeleton Components (
skeleton.tsx)Created reusable skeleton primitives:
SkeletonSkeletonLineSkeletonCardSkeletonTableSkeletonChartFeatures:
Empty State Component (
empty-state.tsx)Reusable component supporting:
Additional features:
Error Boundary System (
error-boundary.tsx)Implemented reusable:
Handles:
Additional features:
Toast System (
toast-provider.tsx)Implemented a global toast provider featuring:
success()error()warning()info()Capabilities:
Dashboard Skeletons (
dashboard-skeleton.tsx)Implemented page-specific loading layouts for:
Features:
Compound Interest Calculator (
savings-calculator.tsx)Implemented:
Features Delivered
✅ Reusable skeleton primitives
✅ Smooth loading animations
✅ Page-specific skeleton layouts
✅ Comprehensive error boundary system
✅ Global toast notification system with queue management
✅ Reusable empty state components
✅ Responsive design
✅ Accessibility compliance
✅ Mock data abstraction ready for future API integration
Issues Closed