Yep. AI rewrote the whole thing.

Downterm/CommandNotchTests/AppSettingsControllerTests.swift

@@ -0,0 +1,42 @@
+import XCTest
+@testable import CommandNotch
+
+@MainActor
+final class AppSettingsControllerTests: XCTestCase {
+    func testTerminalSessionConfigurationIncludesShellPath() {
+        let store = InMemoryAppSettingsStore()
+        var settings = AppSettings.default
+        settings.terminal.shellPath = "/opt/homebrew/bin/fish"
+        store.storedSettings = settings
+
+        let controller = AppSettingsController(store: store)
+
+        XCTAssertEqual(controller.terminalSessionConfiguration.shellPath, "/opt/homebrew/bin/fish")
+    }
+
+    func testTerminalSizePresetsDecodeFromTypedSettings() {
+        let store = InMemoryAppSettingsStore()
+        let presets = [
+            TerminalSizePreset(name: "Wide", width: 960, height: 420, hotkey: .cmdShiftDigit(4))
+        ]
+        var settings = AppSettings.default
+        settings.terminal.sizePresetsJSON = TerminalSizePresetStore.encodePresets(presets)
+        store.storedSettings = settings
+
+        let controller = AppSettingsController(store: store)
+
+        XCTAssertEqual(controller.terminalSizePresets, presets)
+    }
+}
+
+private final class InMemoryAppSettingsStore: AppSettingsStoreType {
+    var storedSettings = AppSettings.default
+
+    func load() -> AppSettings {
+        storedSettings
+    }
+
+    func save(_ settings: AppSettings) {
+        storedSettings = settings
+    }
+}