Fix TopRepos error handling and improve UI statesFix toprepos

[nangaretejal991-bit]

• Added proper error state with retry button
• Fixed empty state logic
• Improved API handling

[vercel]

@nangaretejal991-bit is attempting to deploy a commit to the PRIYANSHU DOSHI's projects Team on Vercel.

A member of the Team first needs to authorize it.

[Priyanshu-byte-coder]

This PR has two separate issues blocking it:

1. Mixed commits from two different contributors
The commit history shows work from both MansimranKaurBedi0 (copy URL feature on DashboardHeader) and nangaretejal991-bit (TopRepos improvements). These are unrelated changes and should be submitted as separate PRs — one per feature, one author each.

2. Broken diffs in both files

DashboardHeader.tsx: Has duplicate useState import and leftover dead code from the original file after the new function closes. The file as patched would not compile.

TopRepos.tsx: Contains two conflicting .then() chains — both the old and new implementations are present in the file, causing a syntax error.

Please:

1. Rebase on main
2. Submit the DashboardHeader copy button as its own clean PR
3. Submit the TopRepos improvements as a separate clean PR

Also: package-lock.json removes "peer": true on 12 entries — this is npm version noise unrelated to the feature. After rebasing, run git checkout origin/main -- package-lock.json before committing.

[Priyanshu-byte-coder]

Closing per the review feedback — this PR mixes commits from two contributors and has broken diffs in both DashboardHeader.tsx and TopRepos.tsx. Please submit as two separate clean PRs: one for the TopRepos improvements and one for the DashboardHeader copy-URL button (note: a clean PR for the copy-URL feature already exists as #66).