fix: resolve api route mapping, response type validation, and signatu…

[Alhaji-naira]

PR Description: Monorepo Cleanup, API Route Fixes, and Layout Stabilization

Overview

This PR addresses code debt, removes unused files accumulated during the hackathon phase, resolves layout/provider crashes, and fixes runtime API and state rendering loops to make the application fully stable in both development and production builds.

Key Changes

1. Codebase Cleanup & Technical Debt Reduction

• Unused Code Removal: Safely deleted redundant hooks (useDebounce, useWalletConnection, useSorobanEvents), test files, mock scripts, and unused components (e.g., SwapInterface, ExpertModeModal, Sidebar).
• Dependency & Import Fixes:
  • Corrected import pathways and standardized default imports for Slider and Checkbox components.
  • Type-safe cast Sentry configuration and TanStack Query parameters to adapt to newer library versions.

2. Layout & Context Stabilization

• Root Layout Restructuring: Nested layout elements inside missing global providers (SettingsProvider, QueryProvider, BackendHealthProvider, and NetworkGuard) in src/app/layout.tsx to prevent context bails downstream.
• Render Loop Elimination: Refactored useSigningActions selector hook in src/stores/signatureStore.ts to query slice variables individually, preventing React hydration loops and resolving the Maximum update depth exceeded runtime overlay error.

3. API Path Resolution & Paginated Validation

• Path Correction: Changed target endpoint from /invoices to /api/invoices in src/lib/api.ts to properly call the Next.js API route.
• Interface & Validator Matching: Redefined InvoicesResponse type definition and the isInvoicesResponse validator function in types/api.ts to accommodate the paginated API response payload shape ({ data: InvoiceSummary[], pagination: ... }).
• State Update Adaptation: Modified the client page fetch cycle in src/app/page.tsx to call setInvoices(res.data.data).

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Verification & Testing

• Type Safety: Verified via tsc --noEmit returning zero compilation errors.
• Production Build: Executed npm run build successfully (Exit code: 0).
• Manual Verification: Navigated the application locally on http://localhost:3000/; verified the Verified Asset Pipeline dashboard table retrieves, validates, and renders the mock invoice rows cleanly.

closes #271

[AlAfiz]

Nice and Great work done. A proper clean up