fix(widget): correct broken navigation routes in recommendation widget cards

[just-tanvi]

Problem

Several recommendations generated by the recommendation system (surfaced through NextBestActionWidget.tsx) linked to non-existent pages (e.g. /projects, /open-source/issues, /pathways, etc.), resulting in 404 page-not-found errors when clicked.

Solution

• Audited the filesystem and mapping routes under src/app/ to identify all valid destinations.
• Updated the recommendation objects in src/utils/recommendations.ts to link to correct existing routes (e.g. /paths, /opensource, /community, and /resources?open=internship-calendar) while preserving the original user intent.
• Solved E2E strict-mode selector conflicts in login.spec.ts and roadmap.spec.ts to ensure full test suite validation passes.

Verification Results

• E2E Tests: npm run test:e2e passed successfully (28/28 tests passed).
• Unit Tests: npm test passed successfully (19/19 tests passed).
• TypeScript & Production Build: npm run build compiled successfully.

closes #685