feat: refactor Home component and add mock data for initial messages …

[Benedict315]

PR Description: Centralize Mock Data
Summary
This PR centralizes hardcoded mock data from React components into a dedicated configuration file to prevent unnecessary re-renders and improve maintainability.

Changes Made
Moved mock data to src/config/mockData.ts: Consolidated goalData, initialMessages, and defaultAllocations into a single export file
Updated src/app/page.tsx: Removed inline goalData definition and added imports for goalData and initialMessages from the centralized file
Updated src/utils/allocationParser.ts: Modified getDefaultAllocations() to return the imported defaultAllocations array instead of defining it locally
Why This Change
Performance: Prevents recreation of mock objects on every component render
Maintainability: All mock data is now in one place for easy updates
Code Quality: Eliminates static mock objects within React component bodies
Acceptance Criteria ✅
No static mock objects are defined within React components
Application functions exactly as before with data imported from centralized file
All imports are correct and functional
Testing
Verified no compilation errors in modified files
Confirmed no remaining hardcoded mock data in components
Changes are minimal and non-breaking
Files Changed
mockData.ts (existing file, now used for imports)
page.tsx
allocationParser.ts
closes #43

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