Complete Phase 3: Text injection with permissions management

- Implement text injection with paste method (NSPasteboard + ⌘V)
- Add typing fallback with Unicode support and keyboard layout respect
- Integrate secure input detection using IsSecureEventInputEnabled()
- Add comprehensive permission checking and management
- Create Permissions tab in preferences with status indicators
- Add permission onboarding flow for new users
- Implement automatic fallback between injection methods
- Add deep links to System Settings for permission grants
- Remove duplicate preferences menu item
- Create development build script for easier testing
- Update Phase 3 tasks as completed in TODO.md

Sources/CorePermissions/PermissionManager.swift

@@ -155,8 +155,10 @@ public class PermissionManager: ObservableObject {
 
         if testEvent != nil {
             inputMonitoringStatus = .granted
+            logger.debug("Input monitoring permission appears to be granted")
         } else {
             inputMonitoringStatus = .denied
+            logger.warning("Input monitoring permission appears to be denied")
         }
     }
 }