feat(ui): implement dark mode dashboard verification fleet and notifi…

[Glorious21]

Summary

This PR implements the requested Figma dark-mode designs for the SwiftChain frontend, covering the dashboard, blockchain receipt verification, fleet and partner network, and notifications experiences.

Implemented

• Implemented the Dashboard Overview Page with active shipments, metrics, recent transactions, and quick actions.
• Implemented the Smart Contract Receipt Verification Page for verifying delivery proofs and transaction receipts.
• Implemented the Fleet & Partner Network Page for viewing delivery partners, fleet vehicles, coverage areas, and on-chain trust scores.
• Implemented the Notifications Page for shipment status updates and transaction confirmations.
• Updated the required routes for the new interfaces.
• Applied dark-mode color variables and appropriate contrast ratios.
• Implemented responsive layouts across desktop and mobile viewports.
• Matched the implemented layouts and component structures with the provided Figma designs.

Validation

• Tested the implemented interfaces locally.
• Verified responsive behavior across desktop and mobile viewports.
• Checked dark-mode colors, contrast, spacing, typography, and component consistency.
• Verified that the changes do not introduce visual or functional regressions.

Issues

Closes #447
Closes #448
Closes #449
Closes #450