Timer implemented. No working tests.

src/components/Tracker/useTracker.ts

@@ -8,6 +8,7 @@ import { usePlanExecution } from '../../hooks/usePlanExecution';
 import { useAuth } from '../../context/AuthContext';
 import { useActiveWorkout } from '../../context/ActiveWorkoutContext';
 import { useSession } from '../../context/SessionContext';
+import { useRestTimer } from '../../hooks/useRestTimer';
 
 export const useTracker = (props: any) => { // Props ignored/removed
     const { currentUser } = useAuth();
@@ -61,6 +62,21 @@ export const useTracker = (props: any) => { // Props ignored/removed
     const form = useWorkoutForm({ userId, onUpdateSet: handleUpdateSetWrapper });
     const planExec = usePlanExecution({ activeSession, activePlan, exercises });
 
+    // Rest Timer Logic (Moved from ActiveSessionView to persist state)
+    const getTargetRestTime = () => {
+        if (activePlan) {
+            const currentStep = activePlan.steps[planExec.currentStepIndex];
+            if (currentStep && currentStep.restTimeSeconds) {
+                return currentStep.restTimeSeconds;
+            }
+        }
+        return currentUser?.profile?.restTimerDefault || 120;
+    };
+    const targetRestTime = getTargetRestTime();
+    const timer = useRestTimer({
+        defaultTime: targetRestTime
+    });
+
     // Initial Data Load
     useEffect(() => {
         if (!userId) return;
@@ -247,7 +263,8 @@ export const useTracker = (props: any) => { // Props ignored/removed
         onSessionEnd: endSession,
         onSessionQuit: quitSession,
         onRemoveSet: removeSet,
-        activeSession // Need this in view
+        activeSession, // Need this in view
+        timer // Expose timer to views
     };
 };