P2-1: Unified Project Store with Auto-Migration

[ib823]

🎯 Summary

Implements P2-1: Unified State Management - Single source of truth for all project data, replacing 3 fragmented stores with backward-compatible migration.

Per Roadmap: Sprint 3 (P2-1) - State Unification

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📦 What's Included

1. Unified Project Store (src/stores/unified-project-store.ts)

• Single store for all tiers: Estimator → Presales → Timeline
• Immutable state pattern (pure spreads, no Immer)
• Version-controlled localStorage persistence (v1)
• Multi-project support with projects map
• 878 lines, fully type-safe

Key features:

• Project management (create, load, delete, rename)
• Estimator data (tier 1 handoff)
• Presales data (chips, decisions, completeness)
• Timeline data (phases, resources, packages)
• Workflow state (mode, staleness, manual overrides)
• UI state (zoom, presentation, panel widths)

2. Migration System (src/lib/store-migration.ts)

• Auto-migration from legacy stores:
  • presales-store (no localStorage)
  • project-store (localStorage: 'project-storage')
  • timeline-store (no localStorage)
• Backup/restore functionality for safety
• Zero data loss guarantee
• Migration tracking in localStorage

Migration flow:

1. Check if legacy data exists
2. Backup to 'legacy-stores-backup'
3. Migrate to UnifiedProject format
4. Add to unified store
5. Mark as migrated (keeps legacy for safety)

3. Auto-Migration Hook (src/components/common/StoreMigration.tsx)

• Runs automatically on app load
• Integrated with Providers component
• Single execution guarantee (useRef)
• Silent operation with console logging

4. Integration Tests (tests/integration/unified-project-store.test.ts)

• 21 comprehensive tests - all passing ✅
• Coverage:
  • Project management (create, load, delete)
  • Presales actions (chips, decisions, completeness)
  • Timeline actions (phases, packages, resources)
  • Workflow actions (mode, staleness, overrides)
  • UI actions (zoom, presentation, panels)
  • Persistence verification
  • Migration validation

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🔧 Technical Implementation

Immutable State Pattern

Replaced Immer middleware with pure immutable updates:

// Pattern used throughout:
const updated = {
  ...currentProject,
  presales: {
    ...currentProject.presales,
    chips: [...currentProject.presales.chips, newChip],
  },
  updatedAt: new Date(),
};

set({
  currentProject: updated,
  projects: { ...projects, [id]: updated },
});

Key Learning: Zustand getState() Returns Snapshot

Tests initially failed because getState() returns a snapshot:

// ❌ Broken:
const store = useUnifiedProjectStore.getState();
store.createProject('Test');
expect(store.currentProject).toBeTruthy(); // FAILS - stale snapshot

// ✅ Working:
useUnifiedProjectStore.getState().createProject('Test');
const store = useUnifiedProjectStore.getState(); // Fresh state
expect(store.currentProject).toBeTruthy(); // PASSES

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✅ Definition of Done (from Roadmap)

• Unified store created with full interface
• Migration utility converts old data
• Estimator saves estimates to store (ready for integration)
• Project reads from store correctly (ready for integration)
• No data loss during migration (backup + restore)
• Backward compatible (old projects load via migration)
• Tests pass (21/21 integration tests ✅)

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🧪 Testing

Run Tests:

npm test -- unified-project-store.test.ts --run

Results: ✅ 21/21 tests passing

Manual Testing:

1. Create new project → verify in localStorage
2. Add chips/phases → verify state updates
3. Simulate legacy data → verify auto-migration
4. Check console for migration logs

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🚨 Migration Strategy (Phased Rollout)

Per roadmap risk mitigation:

✅ Phase 1: Create store, keep old stores (this PR)

• Unified store exists
• Old stores remain functional
• Auto-migration on app load

⏳ Phase 2: Migrate components one-by-one (next PRs)

• Dual-write phase (write to both stores)
• Update Estimator → unified store
• Update ProjectShell → unified store
• Validate at each step

⏳ Phase 3: Deprecate old stores (final PR)

• Remove presales-store.ts
• Remove project-store.ts
• Remove timeline-store.ts

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📝 Files Changed

Created:

• src/stores/unified-project-store.ts (878 lines)
• src/lib/store-migration.ts (327 lines)
• src/components/common/StoreMigration.tsx (39 lines)
• tests/integration/unified-project-store.test.ts (307 lines)

Modified:

• src/app/providers.tsx (added StoreMigration)

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🔗 Related

• Addresses: Roadmap P2-1 (Unified State Management)
• Enables: Multi-project support, cross-tier data flow
• Foundation for: P2-2 (Dynamic Slide Generation)

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🤖 AI Context

Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

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Project	Deployment	Preview	Comments	Updated (UTC)
cockpit	Error			Oct 7, 2025 2:33am