fix: anchor .git regex in repo name extraction (handleAddRepo)

Same mid-string strip bug we fixed in RepoDetailView. This instance
was in the name = gitUrl.split('/').pop()?.replace('.git', '') line.

Author: DevanshuNEU

frontend/src/components/dashboard/DashboardHome.tsx

@@ -86,7 +86,7 @@ export function DashboardHome() {
   const handleAddRepo = async (gitUrl: string, branch: string) => {
     try {
       setLoading(true)
-      const name = gitUrl.split('/').pop()?.replace('.git', '') || 'unknown'
+      const name = gitUrl.split('/').pop()?.replace(/\.git$/, '') || 'unknown'
       const repoId = await addAndIndex(name, gitUrl, branch)
       if (repoId) {
         setIndexingRepoId(repoId)