Add Empty States for Dashboard Pages

[Abd-Standard]

Description
Create informative empty states when users have no tasks, grants, applications, or notifications.

Acceptance Criteria
Design consistent empty state components.
Include call-to-action buttons.
Match existing UI styling

[OluRemiFour]

Hi Maintainer,
Interested in working on this issue. I'll implement the requested changes and ensure everything is properly tested before submission.

[michaelvic123]

I’d love to work on this issue. I’m a full-stack developer with experience building and maintaining web applications across both frontend and backend technologies. The issue looks interesting, and I’m confident I can contribute a solid solution.

[grantfox-oss]

🦊 GrantFox — @michaelvic123 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #69)
2. Your PR will be reviewed by the Core-Foundry maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@michaelvic123's PR #135 was approved and merged by @Abd-Standard.

🏆 @michaelvic123: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,856 total points). Track your full progress on GrantFox.

👏 Great work, @michaelvic123! Keep contributing to Core-Foundry.