feat: add onboarding walkthrough targets for dashboard widgets

[RajD2910]

Summary

This PR improves the onboarding walkthrough experience by adding target IDs to key dashboard widgets so the existing Driver.js onboarding tour can properly highlight and explain important sections of the dashboard.

Changes Made
Added onboarding tour target IDs for:
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Goals & Insights
Impact

These targets allow the onboarding walkthrough to spotlight and describe core dashboard sections, helping first-time users understand the available features and metrics.

Related Issue

Closes #2438

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[github-actions]

GSSoC Label Checklist 🏷️

@Umbrella-io — please apply the appropriate labels before merging:

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• level:beginner — 20 pts
• level:intermediate — 35 pts
• level:advanced — 55 pts
• level:critical — 80 pts

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[Priyanshu-byte-coder]

This PR has merge conflicts with main. Please rebase your branch: git fetch upstream && git rebase upstream/main, resolve conflicts, then force-push.

[RajD2910]

Thanks for the review. I have rebased the branch on the latest main, resolved the pnpm-lock.yaml conflicts, and force-pushed the updated changes. The PR is now up to date and ready for review.

[Priyanshu-byte-coder]

New UI/feature PRs are on hold during the code quality sprint — see discussion #2651. PRs for tests, refactoring, bug fixes, docs, and performance are welcome.

[Priyanshu-byte-coder]

New feature/UI PRs are on hold during the code-quality sprint — see discussion #2651. We'll revisit after the sprint; tests, refactors, and bug-fix PRs are the priority right now.

[Priyanshu-byte-coder]

Closing as stale. The last commit on this branch was 2026-06-21, over a month ago, and there's been no activity since. It also has merge conflicts against current main.

This isn't a rejection of the idea — DevTrack's PR queue grew past 110 open PRs, so I'm clearing branches that have gone quiet so the review tab reflects what's actually in progress.

If you still want to land this: rebase on current main, address any review feedback above, and reopen this PR (or open a fresh one) — I'll review it. Thanks for contributing to DevTrack.