Dashboard implementation

[teslims2]

PR: Dashboard Implementation

Summary

Implement the missing dashboard shown after login (for authenticated users), with:

• Welcome message with user name/email
• BST token balance from GET /users/:id/token-balance
• Enrolled courses progress from GET /users/:id/progress
• Recent credentials from GET /credentials/:userId
• Course title lookup from GET /courses/:id for progress entries

Implementation details

• New route: apps/frontend/src/app/dashboard/page.tsx
• Locale-aware route link: apps/frontend/src/app/[locale]/dashboard/page.tsx
• Protected route handling using existing ProtectedRoute and auth context
• Navbar updated to include /dashboard

UX/Loading

• Skeleton loaders while API data loads
• Graceful message when no enrolled courses/credentials exist
• Error banner when dashboard data fetch fails

Tests & mocks

• Added apps/frontend/src/__tests__/pages/DashboardPage.test.tsx
• Updated MSW handlers in apps/frontend/src/__tests__/mocks/handlers.ts for dashboard endpoints (/users/me, /users/:id/token-balance, /users/:id/progress, /credentials/:userId, /courses/:id)

Notes

• On first run, install dependencies and fix k6@^0.50.0 resolution issue in pipeline if needed.
• Branch pushed to dashboard-implementation.
• Open PR on GitHub: https://github.com/teslims2/Brain-Storm/pull/new/dashboard-implementation
  #Closes Frontend: Dashboard — build student dashboard page #35

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