issue #2430

[mishrapari210607-bit]

Summary

Implements issue #2430 by adding empty state UI for dashboard sections that previously rendered blank when no data was available.

Changes

• Added empty states for AI Mentor widget
• Added empty states for Coding Time widget
• Added empty states for Consistency Score widget
• Added empty states for Commit Time Chart
• Preserved existing loading and error states
• Prevented dashboard cards from collapsing when data is unavailable

Verification

• npm run lint ✅
• npm run type-check ✅

Closes #2430

[github-actions]

Thanks for your first PR on DevTrack! 🎉

A maintainer will review it within 48 hours. While you wait:

• Make sure CI is passing (type-check + lint)
• Double-check the PR description is filled out and the issue is linked
• Feel free to ask questions in Discussions if you need help

If you find DevTrack useful, a ⭐ star on the repo is always appreciated — it helps the project grow and attract more contributors!

[github-actions]

GSSoC Label Checklist 🏷️

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

Difficulty (pick one):

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

Quality (optional):

• quality:clean — ×1.2 multiplier
• quality:exceptional — ×1.5 multiplier

Validation (required to score):

• gssoc:approved — counts for points
• gssoc:invalid / gssoc:spam / gssoc:ai-slop — does not score

Type labels (type:*) are auto-detected from files and title. Review and adjust if needed.
Points formula: (difficulty × quality_multiplier) + type_bonus