feat: full project creation flow and dashboard integration complete

[Toromo7]

Summary
This PR implements the end-to-end flow for project creation, transitioning the application from static mock data to a dynamic, database-backed system.

Key Accomplishments
Multi-Step Project Wizard: Fully functional 4-step form (Basic Details, Milestones, Budget, and Deployment) with state management and validation.
Neon DB Integration: Successfully integrated the backend with Neon Postgres to persist project data and milestones in the cloud.
Dashboard Sync: Updated the Dashboard to fetch real-time data, verified by successful rendering of the "Kaduna Tech Workshop" test projects.
Build & Auth Resolution: Resolved critical module import errors and implemented a developer-mode authentication fallback to ensure the "Confirm & Deploy" step functions correctly in the dev environment.

Impact
This closes the primary user journey loop for TaskChain. Users can now successfully create a project, save it to the database, and see it reflected immediately on their dashboard with accurate budget and milestone tracking.
Closes #48

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[Toromo7]

build fixed