perf: reduce redundant fetches and improve list render efficiency

- Remove no-op per-row task from RepositoryListView; loadMoreIfNeeded
  is a stub for repos so each row was allocating a Task that did nothing
- Fix BuildListView auto-refresh stopping permanently after navigating
  away; startAutoRefresh now runs unconditionally on task so it restarts
  on every reappear, not just first load
- Add lastRefreshed tracking to HomeViewModel with a needsRefresh(after:)
  helper; HomeView and WorkView scene-activation handlers now skip
  loadDashboard() if the data is less than 60 seconds old
- Add 120-second TTL to repository build status refresh; statuses are
  no longer re-fetched on every tab appear, only when stale or when the
  user explicitly pulls to refresh (forceRefresh: true)

Implements: https://todo.sr.ht/~ccleberg/hutch/56

1 files changed, 1 insertions, 4 deletions

diff --git a/Hutch/Views/Repositories/RepositoryListView.swift b/Hutch/Views/Repositories/RepositoryListView.swift
index 68dd0b0..0258a58 100644
--- a/Hutch/Views/Repositories/RepositoryListView.swift
+++ b/Hutch/Views/Repositories/RepositoryListView.swift
@@ -88,9 +88,6 @@ struct RepositoryListView: View {
                     )
                 }
                 .alignmentGuide(.listRowSeparatorLeading) { _ in 0 }
-                .task {
-                    await viewModel.loadMoreIfNeeded(currentItem: repo)
-                }
             }
 
             if viewModel.isLoadingMore {
@@ -156,7 +153,7 @@ struct RepositoryListView: View {
         }
         .srhtErrorBanner(error: $vm.error)
         .refreshable {
-            await viewModel.loadRepositories()
+            await viewModel.loadRepositories(forceRefresh: true)
         }
         .task {
             await viewModel.loadRepositories()