源码快照 @ 2026-09-01 (source-only, 剔除非源码素材)

apps/mobile/ios/TuttiMobile/MobilePreferencesModule.swift

@@ -0,0 +1,57 @@
+import Foundation
+import React
+
+@objc(TuttiMobilePreferences)
+final class MobilePreferencesModule: NSObject {
+  private let defaults = UserDefaults.standard
+
+  @objc
+  static func requiresMainQueueSetup() -> Bool {
+    false
+  }
+
+  @objc
+  func loadThemePreference() -> String {
+    Self.normalizeThemePreference(
+      defaults.string(forKey: Self.themePreferenceKey)
+    )
+  }
+
+  @objc(saveThemePreference:resolver:rejecter:)
+  func saveThemePreference(
+    _ preference: String,
+    resolver resolve: RCTPromiseResolveBlock,
+    rejecter reject: RCTPromiseRejectBlock
+  ) {
+    guard Self.supportedThemePreferences.contains(preference) else {
+      reject(
+        "INVALID_THEME_PREFERENCE",
+        "Unsupported Mobile theme preference",
+        nil
+      )
+      return
+    }
+    defaults.set(preference, forKey: Self.themePreferenceKey)
+    guard defaults.string(forKey: Self.themePreferenceKey) == preference else {
+      reject(
+        "THEME_PREFERENCE_WRITE_FAILED",
+        "Unable to save Mobile theme preference",
+        nil
+      )
+      return
+    }
+    resolve(nil)
+  }
+
+  private static let supportedThemePreferences: Set<String> = [
+    "system", "light", "dark",
+  ]
+  private static let themePreferenceKey = "themePreference"
+
+  private static func normalizeThemePreference(_ value: String?) -> String {
+    guard let value, supportedThemePreferences.contains(value) else {
+      return "system"
+    }
+    return value
+  }
+}