fix: Share extension title extraction and theme persistence

- Enable text support in share extension to extract page titles
- Extract titles from attributedTitle and attributedContentText
- Prevent titles from being used as URLs with proper validation
- Fix theme settings persistence using SettingsRepository instead of UserDefaults
- Theme changes now properly notify the app for immediate updates

URLShare/Info.plist

@@ -8,6 +8,8 @@
 		<dict>
 			<key>NSExtensionActivationRule</key>
 			<dict>
+				<key>NSExtensionActivationSupportsText</key>
+				<true/>
 				<key>NSExtensionActivationSupportsWebURLWithMaxCount</key>
 				<integer>1</integer>
 			</dict>

URLShare/ShareBookmarkViewModel.swift

@@ -67,8 +67,22 @@ class ShareBookmarkViewModel: ObservableObject {
             logger.warning("No extension context available for content extraction")
             return 
         }
+        
+        var extractedUrl: String?
+        var extractedTitle: String?
+        
         for item in extensionContext.inputItems {
             guard let inputItem = item as? NSExtensionItem else { continue }
+            
+            // Use the inputItem's attributedTitle or attributedContentText as potential title
+            if let attributedTitle = inputItem.attributedTitle?.string, !attributedTitle.isEmpty {
+                extractedTitle = attributedTitle
+                logger.info("Extracted title from input item: \(attributedTitle)")
+            } else if let attributedContent = inputItem.attributedContentText?.string, !attributedContent.isEmpty {
+                extractedTitle = attributedContent
+                logger.info("Extracted title from content text: \(attributedContent)")
+            }
+            
             for attachment in inputItem.attachments ?? [] {
                 if attachment.hasItemConformingToTypeIdentifier(UTType.url.identifier) {
                     attachment.loadItem(forTypeIdentifier: UTType.url.identifier, options: nil) { [weak self] (url, error) in
@@ -76,6 +90,12 @@ class ShareBookmarkViewModel: ObservableObject {
                             if let url = url as? URL {
                                 self?.url = url.absoluteString
                                 self?.logger.info("Extracted URL from shared content: \(url.absoluteString)")
+                                
+                                // Set title if we extracted one and current title is empty
+                                if let title = extractedTitle, self?.title.isEmpty == true {
+                                    self?.title = title
+                                    self?.logger.info("Set title from shared content: \(title)")
+                                }
                             } else if let error = error {
                                 self?.logger.error("Failed to extract URL: \(error.localizedDescription)")
                             }
@@ -85,9 +105,18 @@ class ShareBookmarkViewModel: ObservableObject {
                 if attachment.hasItemConformingToTypeIdentifier(UTType.plainText.identifier) {
                     attachment.loadItem(forTypeIdentifier: UTType.plainText.identifier, options: nil) { [weak self] (text, error) in
                         DispatchQueue.main.async {
-                            if let text = text as? String, let url = URL(string: text) {
+                            if let text = text as? String {
+                                // Only treat as URL if it's a valid URL and we don't have one yet
+                                if self?.url == nil, let url = URL(string: text), url.scheme != nil {
                                     self?.url = url.absoluteString
                                     self?.logger.info("Extracted URL from shared text: \(url.absoluteString)")
+                                } else {
+                                    // If not a valid URL or we already have a URL, treat as potential title
+                                    if self?.title.isEmpty == true {
+                                        self?.title = text
+                                        self?.logger.info("Set title from shared text: \(text)")
+                                    }
+                                }
                             } else if let error = error {
                                 self?.logger.error("Failed to extract text: \(error.localizedDescription)")
                             }

readeck/UI/Settings/AppearanceSettingsView.swift

@@ -6,10 +6,12 @@ struct AppearanceSettingsView: View {
     
     private let loadCardLayoutUseCase: PLoadCardLayoutUseCase
     private let saveCardLayoutUseCase: PSaveCardLayoutUseCase
+    private let settingsRepository: PSettingsRepository
     
     init(factory: UseCaseFactory = DefaultUseCaseFactory.shared) {
         self.loadCardLayoutUseCase = factory.makeLoadCardLayoutUseCase()
         self.saveCardLayoutUseCase = factory.makeSaveCardLayoutUseCase()
+        self.settingsRepository = SettingsRepository()
     }
     
     var body: some View {
@@ -58,18 +60,29 @@ struct AppearanceSettingsView: View {
     }
     
     private func loadSettings() {
-        // Load theme setting
-        let themeString = UserDefaults.standard.string(forKey: "selectedTheme") ?? "system"
-        selectedTheme = Theme(rawValue: themeString) ?? .system
-        
-        // Load card layout setting
         Task {
+            // Load both theme and card layout from repository
+            if let settings = try? await settingsRepository.loadSettings() {
+                await MainActor.run {
+                    selectedTheme = settings.theme ?? .system
+                }
+            }
             selectedCardLayout = await loadCardLayoutUseCase.execute()
         }
     }
     
     private func saveThemeSettings() {
-        UserDefaults.standard.set(selectedTheme.rawValue, forKey: "selectedTheme")
+        Task {
+            // Load current settings, update theme, and save back
+            var settings = (try? await settingsRepository.loadSettings()) ?? Settings()
+            settings.theme = selectedTheme
+            try? await settingsRepository.saveSettings(settings)
+            
+            // Notify app about theme change
+            await MainActor.run {
+                NotificationCenter.default.post(name: .settingsChanged, object: nil)
+            }
+        }
     }
     
     private func saveCardLayoutSettings() {