Feature/sc 39979/add user download history to clark

[imrakeshgulla]

Title

feature/sc-39979: Add user download history page

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Description

Summary
Replaces the authenticated user's legacy Library page with a dedicated Download History page backed by the CLARK API GET /users/download-history endpoint.

Key Changes

• Routing & Navigation: Added the /download-history route and set /library to automatically redirect to it. Updated primary navbar entries across desktop and mobile layouts to point to Download History.
• API Integration: Integrated GET /users/download-history into LibraryService with support for paginated results via nextCursor.
• UI & Workflows:
• Replaced saved Library page elements (rating column, download button, delete modal, and removeFromLibrary logic) with a clean audit log view.
• Added UI states for loading, empty history, error/retry, unavailable resources, and "Load More" pagination.
• Row clicks now safely fetch current details and navigate to the learning object details page instead of triggering immediate downloads or treating entries as active saved items.

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Verification & Testing

• Type Check & Lint: Passed npx tsc -p src/tsconfig.app.json --noEmit and npx ng lint clark.
• Formatting: Verified using npx prettier --check and git diff --check.
• Specs: Added focused unit tests for LibraryService API route construction and LibraryComponent state management.

Screen.Recording.2026-09-14.at.12.40.54.PM.mov

[Cwagne17]

Could you add a screenshot or video recording?