feat: implement issues #598-601 refactoring

[obedebuka41-dotcom]

• Refactor error handling to use structured error types with error codes #601: structured error handling with domain error classes, metadata logging, client utilities, and ErrorBoundary
• Refactor smart contract to use modular library architecture #600: modular contract architecture with common, escrow, dispute, multisig, htlc libraries
• Refactor frontend state management from Zustand to slices pattern #599: Zustand slices pattern with domain slices and combined store
• Refactor Prisma schema to use inheritance and reduce model duplication #598: Prisma schema base model documentation and consistent patterns

Files changed:

• backend/src/types/errors.ts
• backend/src/middleware/errorHandler.ts
• frontend/lib/errors.ts
• frontend/src/components/common/ErrorBoundary.tsx
• frontend/store/slices.ts
• frontend/store/useStore.ts
• contracts/src/common.rs
• contracts/src/escrow.rs
• contracts/src/dispute.rs
• contracts/src/multisig.rs
• contracts/src/htlc.rs
• contracts/src/lib.rs
• backend/prisma/schema.prisma
• packages/types/src/domain/primitives.ts
• .gitignore

What this PR does

• Summary of the implemented changes related to issue(s) DevTooling: Implement Monorepo with Turborepo for Shared Packages #240 and DevTooling: Implement Real-Time Error Monitoring with Sentry and Custom Dashboards #242
• Any breaking changes introduced (if any)
• Any migrations or data changes (if applicable)

Changes

• List of notable files and modules touched (monorepo wiring, Sentry integration, dashboards, etc.)
• Notes about the Turborepo configuration, shared packages, and ESLint/TS config

Why

• Rationale for the changes and how they solve the Acceptance Criteria

How to test

• Steps to reproduce locally, including commands to run build/test
• Any environment variables needed (e.g., SENTRY_DSN)
• How to verify the dashboards/alerts configuration (stubs or real)

Notes

• Any caveats, risks, or follow-up tasks
• If you want to close issues automatically, include:
  • Closes DevTooling: Implement Monorepo with Turborepo for Shared Packages #240
  • Closes DevTooling: Implement Real-Time Error Monitoring with Sentry and Custom Dashboards #242
    close Refactor Prisma schema to use inheritance and reduce model duplication #598
    close Refactor frontend state management from Zustand to slices pattern #599
    close Refactor smart contract to use modular library architecture #600
    close Refactor error handling to use structured error types with error codes #601

[vercel]

@Fancyhe1 is attempting to deploy a commit to the smartdevs17's projects Team on Vercel.

A member of the Team first needs to authorize it.

[drips-wave]

@obedebuka41-dotcom Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits