feat: page tutorials for Today & Workout, FAB fix, quadrant color consistency

- Add first-visit tutorial cards for TodayView (3 steps) and WorkoutView (3 steps) using new InViewTutorialCard component; each has independent AppStorage completion flag
- Fix FAB hidden behind custom tab bar in MatrixView by moving NavigationStack inside outer ZStack so FAB sits at the correct safe area level
- Fix task colors throughout app to use quadrant.color/softColor instead of taskColor — tasks now consistently show orange/yellow/blue/green matching their matrix quadrant in Today timeline, calendar dots, and day view
- Fix WorkoutView background (move ignoresSafeArea out of ZStack children into .background modifier)

Co-Authored-By: Kutesir <tqwyy79vzn@privaterelay.appleid.com>

KisaniCal/Views/WorkoutView.swift

@@ -62,6 +62,7 @@ struct WorkoutView: View {
     @State private var showManage = false
     @State private var showAddSection = false
     @State private var isReordering = false
+    @ObservedObject private var tm = TutorialManager.shared
     private let restTick = Timer.publish(every: 1, on: .main, in: .common).autoconnect()
 
     private var headerDate: String {
@@ -71,8 +72,6 @@ struct WorkoutView: View {
 
     var body: some View {
         ZStack(alignment: .bottomTrailing) {
-            AppColors.background(cs).ignoresSafeArea()
-
             if isReordering {
                 Color.black.opacity(0.001)
                     .ignoresSafeArea()
@@ -219,7 +218,23 @@ struct WorkoutView: View {
                     .foregroundColor(AppColors.accent)
                 }
             }
+
+            if tm.workoutIsActive {
+                VStack {
+                    Spacer()
+                    InViewTutorialCard(
+                        tips: tm.workoutTips,
+                        step: $tm.workoutStep,
+                        onAdvance: { tm.advanceWorkout() },
+                        onSkip:    { tm.skipWorkout() }
+                    )
+                    .padding(.bottom, 84)
+                }
+                .transition(.opacity)
+                .zIndex(10)
+            }
         }
+        .background(AppColors.background(cs).ignoresSafeArea())
         .overlay(alignment: .top) {
             if isReordering {
                 Button {