Fix: Project dashboard not updating emissions data

[Mounesh-13]

Problem
The Project dashboard does not update emissions data dynamically, while the Home dashboard reflects updates correctly.

Root Cause
The Home tab uses useSWR, which provides automatic polling and revalidation.
The Project tab relied on useEffect, resulting in stale data unless the page was manually refreshed.

Solution

Replaced useEffect-based data fetching with useSWR
Added refreshInterval (60s) for automatic updates
Used dynamic SWR keys (projectId + date range) to ensure proper re-fetching
Kept aggregation logic in the frontend using useMemo for performance

Improvements

Added null-safe reducers (?? 0) to prevent NaN issues from malformed API data
Introduced a user-facing error state for failed data fetching
Aligned Project dashboard behavior with Home dashboard for consistency

Testing

Verified automatic refresh (updates within 60 seconds)
Verified date range filter triggers re-fetch
Verified data updates after switching browser tabs (focus revalidation)
Verified correct behavior for empty projects (no NaN values)
Confirmed no console errors or UI regressions

This change ensures the Project dashboard stays in sync with real-time emissions data and improves overall reliability.