feat: add min-length filter and history deduplication

Services/ClipboardStore.swift

@@ -47,7 +47,19 @@ class ClipboardStore: ObservableObject {
 
     private func performAdd(_ item: ClipboardItem) {
         print("[Buffer] Store: Adding item, current count: \(items.count)")
-
+
+        // Deduplication: if an identical inline text entry already exists, promote it
+        // to the top instead of adding a duplicate. File-backed large text is already
+        // deduplicated consecutively via hash in ClipboardWatcher.
+        if SettingsManager.shared.deduplicateHistory,
+           item.type == .text,
+           let newText = item.textContent,
+           !item.isFileBacked,
+           let existing = items.first(where: { $0.type == .text && !$0.isFileBacked && $0.textContent == newText }) {
+            moveToTop(existing)
+            return
+        }
+
         // Insert at beginning (newest first)
         items.insert(item, at: 0)
 

Services/ClipboardWatcher.swift

@@ -84,6 +84,9 @@ class ClipboardWatcher: ObservableObject {
 
         // Try to capture text first
         if let text = pasteboard.string(forType: .string), !text.isEmpty {
+            // Drop entries that are shorter than the configured minimum length
+            guard text.count >= SettingsManager.shared.minTextLength else { return }
+
             let textSize = text.utf8.count
 
             // Use prefix hash for large text to avoid expensive full-string hashing

Services/SettingsManager.swift

@@ -11,36 +11,46 @@ class SettingsManager: ObservableObject {
     // Keys
     private let hotkeyModifiersKey = "hotkeyModifiers"
     private let hotkeyKeyCodeKey = "hotkeyKeyCode"
-
+    private let minTextLengthKey = "minTextLength"
+    private let deduplicateHistoryKey = "deduplicateHistory"
+
     @Published var hotkeyModifiers: HotkeyModifiers
     @Published var hotkeyKeyCode: UInt16
     @Published var launchAtLogin: Bool = false
-
+    @Published var minTextLength: Int
+    @Published var deduplicateHistory: Bool
+
     private init() {
         // Initialize with defaults first, then load saved values
         let defaultMods = HotkeyModifiers(shift: true, command: true, option: false, control: false)
         let defaultKeyCode: UInt16 = 9  // V key
-        
+
         // Load saved modifiers or use default
         if let savedMods = defaults.array(forKey: hotkeyModifiersKey) as? [String] {
             self.hotkeyModifiers = HotkeyModifiers(from: savedMods)
         } else {
             self.hotkeyModifiers = defaultMods
         }
-        
+
         // Load saved keycode or use default (V key)
         let savedKeyCode = defaults.integer(forKey: hotkeyKeyCodeKey)
         self.hotkeyKeyCode = savedKeyCode > 0 ? UInt16(savedKeyCode) : defaultKeyCode
-        
+
         // Load launch at login status
         if #available(macOS 13.0, *) {
             self.launchAtLogin = SMAppService.mainApp.status == .enabled
         }
+
+        // Load history filter settings
+        self.minTextLength = defaults.object(forKey: minTextLengthKey) as? Int ?? 1
+        self.deduplicateHistory = defaults.bool(forKey: deduplicateHistoryKey)
     }
-    
+
     func save() {
         defaults.set(hotkeyModifiers.toArray(), forKey: hotkeyModifiersKey)
         defaults.set(Int(hotkeyKeyCode), forKey: hotkeyKeyCodeKey)
+        defaults.set(minTextLength, forKey: minTextLengthKey)
+        defaults.set(deduplicateHistory, forKey: deduplicateHistoryKey)
     }
 
     func toggleLaunchAtLogin(_ enabled: Bool) {

Views/SettingsView.swift

@@ -79,34 +79,63 @@ struct SettingsView: View {
             }
 
             Divider()
-
+
+            // History section
+            VStack(alignment: .leading, spacing: 12) {
+                Text("History")
+                    .font(.system(size: 13, weight: .medium))
+                    .foregroundColor(.secondary)
+
+                HStack {
+                    Text("Ignore entries shorter than")
+                        .font(.system(size: 12))
+                    Spacer()
+                    Stepper(
+                        settings.minTextLength == 1
+                            ? "1 character"
+                            : "\(settings.minTextLength) characters",
+                        value: $settings.minTextLength,
+                        in: 1...20
+                    )
+                    .font(.system(size: 12))
+                    .onChange(of: settings.minTextLength) { _ in settings.save() }
+                }
+
+                Toggle("Deduplicate history", isOn: $settings.deduplicateHistory)
+                    .font(.system(size: 12))
+                    .onChange(of: settings.deduplicateHistory) { _ in settings.save() }
+                    .toggleStyle(.switch)
+            }
+
+            Divider()
+
             // System section
             VStack(alignment: .leading, spacing: 12) {
                 Text("System")
                     .font(.system(size: 13, weight: .medium))
                     .foregroundColor(.secondary)
-                
+
                 Toggle("Launch at Login", isOn: $settings.launchAtLogin)
                     .font(.system(size: 12))
                     .onChange(of: settings.launchAtLogin) { newValue in
                         SettingsManager.shared.toggleLaunchAtLogin(newValue)
-                        // Sync back state in case toggle fails 
+                        // Sync back state in case toggle fails
                         DispatchQueue.main.async {
                             settings.launchAtLogin = SettingsManager.shared.launchAtLogin
                         }
                     }
                     .toggleStyle(.switch)
             }
-            
+
             Spacer()
-            
+
             // Footer
             Text("Changes take effect after restarting Buffer")
                 .font(.system(size: 10))
                 .foregroundColor(.secondary)
         }
         .padding(20)
-        .frame(width: 320, height: 280)
+        .frame(width: 320, height: 400)
         .background(KeyRecorder(isRecording: $isRecording) { keyCode, modifiers in
             settings.hotkeyKeyCode = keyCode
             settings.hotkeyModifiers = modifiers
@@ -187,35 +216,43 @@ class SettingsViewModel: ObservableObject {
     @Published var hotkeyModifiers: HotkeyModifiers
     @Published var hotkeyKeyCode: UInt16
     @Published var launchAtLogin: Bool
-
+    @Published var minTextLength: Int
+    @Published var deduplicateHistory: Bool
+
     private let defaults = UserDefaults.standard
     private let hotkeyModifiersKey = "hotkeyModifiers"
     private let hotkeyKeyCodeKey = "hotkeyKeyCode"
-    
+
     init() {
         // Load modifiers
         if let savedMods = defaults.array(forKey: hotkeyModifiersKey) as? [String] {
             self.hotkeyModifiers = HotkeyModifiers(from: savedMods)
         } else {
             self.hotkeyModifiers = HotkeyModifiers(shift: true, command: true, option: false, control: false)
         }
-        
+
         // Load keycode (default to V = 9)
         let savedKeyCode = defaults.integer(forKey: hotkeyKeyCodeKey)
         self.hotkeyKeyCode = savedKeyCode > 0 ? UInt16(savedKeyCode) : 9
-        
+
         // Load launch at login status from manager natively via SMAppService
         self.launchAtLogin = SettingsManager.shared.launchAtLogin
+
+        // Load history filter settings
+        self.minTextLength = SettingsManager.shared.minTextLength
+        self.deduplicateHistory = SettingsManager.shared.deduplicateHistory
     }
-    
+
     func save() {
         defaults.set(hotkeyModifiers.toArray(), forKey: hotkeyModifiersKey)
         defaults.set(Int(hotkeyKeyCode), forKey: hotkeyKeyCodeKey)
-        
+
         SettingsManager.shared.hotkeyModifiers = hotkeyModifiers
         SettingsManager.shared.hotkeyKeyCode = hotkeyKeyCode
+        SettingsManager.shared.minTextLength = minTextLength
+        SettingsManager.shared.deduplicateHistory = deduplicateHistory
         SettingsManager.shared.save()
-        
+
         NotificationCenter.default.post(name: .bufferHotkeyChanged, object: nil)
     }
 }