fix(tests): mark XPadPracticeTests @MainActor for Swift 6 strict concurrency

[wiradifit]

Problem

Under latest-stable Xcode / Swift 6.2:

Tests/XPadPracticeTests/XPadPracticeTests.swift:118:41: error: call to main actor-isolated
instance method 'getLessonMastery(for:)' in a synchronous nonisolated context

ProgressTracker is main-actor-isolated (@MainActor public final class), but XPadPracticeTests calls it from nonisolated XCTest methods — rejected by Swift 6 isolation checking.

Fix

Annotate the test class @MainActor — the standard XCTest migration for testing MainActor-isolated code (XCTestCase supports async/main-actor test methods natively).

Verification

Verified on macOS 15 / Xcode latest-stable (public CI run): with this patch, all XPadPracticeTests errors are gone.

Scope note: swift test still surfaces separate pre-existing type-conversion errors in Tests/XPadMIDITests/CoreMIDILoopbackTests.swift (~258) — unrelated to this file, reported separately so each fix stays reviewable.

Summary by Sourcery

Enable XPadPracticeTests to compile under Swift 6 strict concurrency by aligning the test class with the main-actor isolation of the code it exercises.

Bug Fixes:

• Resolve Swift 6 strict-concurrency test failures when XPadPracticeTests accesses main-actor-isolated progress tracking code.

Tests:

• Mark XPadPracticeTests as main-actor isolated for compatibility with XCTest and Swift 6 concurrency checking.

[qodo-code-review]

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Marks XPadPracticeTests as @mainactor so its tests can safely access the main-actor-isolated ProgressTracker under Swift 6 strict concurrency; verification confirms the file’s reported errors are resolved, while unrelated CoreMIDILoopbackTests failures remain out of scope.

File-Level Changes

Change	Details	Files
Align the test class with Swift 6 concurrency isolation by making it main-actor isolated.	Annotate the XCTestCase subclass with @mainactor. Allow synchronous test methods to call the main-actor-isolated ProgressTracker APIs without isolation errors.	Tests/XPadPracticeTests/XPadPracticeTests.swift

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[sourcery-ai]

Hey - I've reviewed your changes and they look great!

Sourcery assessment

Approved.

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