feat(sprint-3): apply Survey Teal field UI

FieldLogger/ViewModels/HomeViewModel.cs

@@ -40,6 +40,16 @@ public sealed partial class HomeViewModel : ObservableObject
     [ObservableProperty]
     private string _syncStatus = "";
 
+    public bool HasNoActiveJob => !HasActiveJob;
+
+    public string ActiveJobPointSummary => PointCount == 1
+        ? "1 point saved locally"
+        : $"{PointCount} points saved locally";
+
+    public string CaptureReadinessText => HasActiveJob
+        ? "READY · Press LOG on the locating receiver"
+        : "BLOCKED · Choose or create an active job first";
+
     public ObservableCollection<LoggedPoint> RecentPoints { get; } = new();
 
     public HomeViewModel(DeviceConnectionManager manager, MaglinkService gps,
@@ -149,6 +159,15 @@ public sealed partial class HomeViewModel : ObservableObject
         PointCount++;
     }
 
+    partial void OnHasActiveJobChanged(bool value)
+    {
+        OnPropertyChanged(nameof(HasNoActiveJob));
+        OnPropertyChanged(nameof(CaptureReadinessText));
+    }
+
+    partial void OnPointCountChanged(int value) =>
+        OnPropertyChanged(nameof(ActiveJobPointSummary));
+
     private async void OnPacketIgnoredNoJob(object? sender, EventArgs e)
     {
         await Shell.Current.DisplayAlert("No Active Job",