Frontend Integration: Fetch Dashboard Data from Backend API #177

[CMI-James]

Description

Update the User Dashboard to fetch active and incoming streams from backend endpoints (GET /api/v1/streams), replacing mock/local-only behavior.

Closes #177

Changes proposed

What were you told to do?

I was asked to update the dashboard so it fetches user stream data from the merged backend API endpoint (GET /api/v1/streams) for outgoing and incoming streams, instead of relying on mock data.

What did I do?

Reworked dashboard stream data source to backend API

• Updated frontend/lib/dashboard.ts to fetch streams from backend API for:
  • outgoing streams (sender=<publicKey>)
  • incoming streams (recipient=<publicKey>)
• Added endpoint candidate resolution so frontend works with /api/v1/streams while remaining compatible with local /v1/streams setups.
• Removed stale mock dashboard constants and centralized numeric/address mapping helpers.

Mapped backend stream payloads into dashboard-friendly structures

• Converted backend stream amounts into display units.
• Generated outgoing/incoming lists and recent activity from API responses.
• Computed dashboard aggregates (totalSent, totalReceived, totalValueLocked, activeStreamsCount) from fetched streams.

Connected dashboard UI to live API data

• Updated frontend/components/dashboard/dashboard-view.tsx to fetch snapshot data on wallet/session key load.
• Added loading and error states for overview and incoming tabs.
• Wired incoming tab to pass API-backed incomingStreams into IncomingStreams component.

Check List (Check all the applicable boxes)

• My code follows the code style of this project.
• This PR does not contain plagiarized content.
• The title and description of the PR is clear and explains the approach.
• I am making a pull request against the main branch (left side).
• My commit messages styles matches our requested structure.
• My code additions will fail neither code linting checks nor unit test.
• I am only making changes to files I was requested to.

Screenshots / Testing Evidence

Validated with:

git commit hook (lint-staged) executed successfully:
- npm run lint --workspace=frontend --