Stabilize iOS/watchOS/tvOS apps and add cross-platform audit remediation

SharedCore/Tests/SharedCoreWatchOSTests/WorkoutValidationTests.swift

@@ -0,0 +1,39 @@
+import XCTest
+@testable import SharedCore
+
+final class WorkoutValidationTests: XCTestCase {
+    func testValidateSupersetsRejectsEmptyPayload() {
+        let issues = WorkoutValidation.validateSupersets([])
+        XCTAssertEqual(issues.first?.code, "empty_supersets")
+    }
+
+    func testValidateSupersetsRejectsInvalidRoundsAndExercisePayload() {
+        let supersets: [[String: Any]] = [
+            [
+                "rounds": 0,
+                "exercises": [
+                    ["reps": 0, "duration": 0]
+                ]
+            ]
+        ]
+
+        let issues = WorkoutValidation.validateSupersets(supersets)
+        XCTAssertTrue(issues.contains(where: { $0.code == "invalid_rounds" }))
+        XCTAssertTrue(issues.contains(where: { $0.code == "invalid_exercise_payload" }))
+    }
+
+    func testValidateSupersetsAcceptsValidPayload() {
+        let supersets: [[String: Any]] = [
+            [
+                "rounds": 3,
+                "exercises": [
+                    ["reps": 12, "duration": 0],
+                    ["reps": 0, "duration": 30]
+                ]
+            ]
+        ]
+
+        let issues = WorkoutValidation.validateSupersets(supersets)
+        XCTAssertTrue(issues.isEmpty)
+    }
+}