fix(clipboard): remove default hotkey configuration

- Set all hotkeys to unassigned (0) by default instead of Cmd+Shift+V
- Users need to manually configure hotkeys if desired
- Fixes double-click auto-paste functionality by ensuring proper configuration initialization

Author: qianmoQ

DockMasterPro/Plugins/ClipboardPlugin/ClipboardPlugin.swift

@@ -511,11 +511,9 @@ final class ClipboardPlugin: WidgetPlugin, ShortcutPlugin, PluginLocalizable {
         _ = database.setConfigBool(key: Key.snippetsEnabled, value: true)
         _ = database.setConfigBool(key: Key.showMenuBarIcon, value: true)
 
-        // 默认快捷键：Cmd+Shift+V
-        _ = database.setConfigInt(key: Key.hotkeyKeyCode, value: 9)  // V key
-        _ = database.setConfigInt(key: Key.hotkeyModifiers, value: Int(NSEvent.ModifierFlags.command.rawValue | NSEvent.ModifierFlags.shift.rawValue))
-        
-        // 其他快捷键默认未设置
+        // 所有快捷键默认未设置
+        _ = database.setConfigInt(key: Key.hotkeyKeyCode, value: 0)
+        _ = database.setConfigInt(key: Key.hotkeyModifiers, value: 0)
         _ = database.setConfigInt(key: Key.snippetsHotkeyKeyCode, value: 0)
         _ = database.setConfigInt(key: Key.snippetsHotkeyModifiers, value: 0)
         _ = database.setConfigInt(key: Key.importExportHotkeyKeyCode, value: 0)