test: add QA coverage — access unit tests, VideoPlayer snapshots, Maestro E2E flows, testIDs

- Add testIDs to explore, workout detail, and collection detail screens
- Add testID prop to VideoPlayer component
- Create access service unit tests (isFreeWorkout, canAccessWorkout)
- Create VideoPlayer rendering snapshot tests (preview/background modes)
- Create Maestro E2E flows: explore-freemium, collection-detail
- Update tab-navigation flow with Explore screen assertions
- Update profile-settings flow with real activity stat assertions
- Update all-tests suite to include new flows

.maestro/flows/tab-navigation.yaml

@@ -17,6 +17,16 @@ name: Tab Navigation
     id: "explore-tab"
     optional: true
 
+# Verify Explore screen loaded with key sections
+- assertVisible:
+    id: "explore-screen"
+    timeout: 5000
+    optional: true
+- assertVisible:
+    id: "filters-section"
+    timeout: 3000
+    optional: true
+
 # Navigate to Activity tab
 - tapOn:
     text: "Activity"