feat: savings tab, fix pull-to-refresh, beautiful modals, fix signing

PulseHealth/Views/Tasks/TasksView.swift

@@ -76,13 +76,16 @@ struct TasksView: View {
         }
         .sheet(isPresented: $showAddTask) {
             AddTaskView(isPresented: $showAddTask) { await loadTasks() }
+                .presentationDetents([.medium, .large])
+                .presentationDragIndicator(.visible)
+                .presentationBackground(Color(hex: "0a0a1a"))
         }
         .task { await loadTasks() }
-        .refreshable { await loadTasks() }
+        .refreshable { await loadTasks(refresh: true) }
     }
 
-    func loadTasks() async {
-        isLoading = true
+    func loadTasks(refresh: Bool = false) async {
+        if !refresh { isLoading = true }
         tasks = (try? await APIService.shared.getTasks(token: authManager.token)) ?? []
         isLoading = false
     }