fix: TypeScript error in branch name lookup for dropdown

Fixed type error by separating the lookup of realtimeRepo (RepoStatus)
and reconciledRepo (ReconciledRepo) to avoid accessing .branch property
on a union type where one variant doesn't have that property.

Now properly checks realtimeRepo.currentActiveBranch first, then falls
back to reconciledRepo.currentActiveBranch, and finally to the deprecated
reconciledRepo.branch property.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: sallyom

components/frontend/src/app/projects/[name]/sessions/[sessionName]/page.tsx

@@ -1661,16 +1661,22 @@ export default function ProjectSessionDetailPage({
                                   // Find branch info for repo directories from real-time status
                                   let branchName: string | undefined;
                                   if (opt.type === "repo") {
-                                    // Try real-time repos status first, then fall back to CR status
-                                    const repo = reposStatus?.repos?.find(
+                                    // Try real-time repos status first
+                                    const realtimeRepo = reposStatus?.repos?.find(
                                       (r) => r.name === opt.path
-                                    ) || session?.status?.reconciledRepos?.find(
+                                    );
+
+                                    // Fall back to CR status
+                                    const reconciledRepo = session?.status?.reconciledRepos?.find(
                                       (r: ReconciledRepo) => {
                                         const repoName = r.name || r.url?.split("/").pop()?.replace(".git", "");
                                         return opt.path === repoName;
                                       }
                                     );
-                                    branchName = repo?.currentActiveBranch || repo?.branch;
+
+                                    branchName = realtimeRepo?.currentActiveBranch
+                                      || reconciledRepo?.currentActiveBranch
+                                      || reconciledRepo?.branch;
                                   }
 
                                   return (