Echo: Global SDR Receiver

Improvements • Fixed KiwiSDR server fetching. (KiwiSDR 2 servers will remain unlabeled pending a future update, and previously saved Kiwi servers may need to be re-favorited) • macOS Compatibility Guidance: Introduced a proactive guidance system for users on Apple Silicon Macs. Echo now intelligently identifies platform hardware restrictions and provides a seamless "Open in Browser" shortcut for FM-DX streams. • Updated branding of "FM-DX" to "FM-DX Webserver" across the app for better consistency where space allows. Added FM-DX community credit to Acknowledgements. • Improved frequency input support for international keyboard layouts (automatically handling localized decimal separators like commas). • Changed formatting of onboarding screen to better reflect location services reason Bug Fixes • Resolved a flashing UI issue that occurred during active connections to FM-DX Webservers. • Fixed a bug where manual tuning and saving stations would silently fail for VoiceOver users or when using certain dictation settings. • Fixed a bug where Monitor Mode would not activate when listening from Active Receiver mode • Tuning Stability: Centralized frequency handling to ensure consistent behavior across all interaction types. Accessibility & VoiceOver • SDR Interface Context: The live radio player now identifies itself to VoiceOver, providing better orientation for blind and low-vision users. • Global Database Fix: Restored access to the "Favorite" button within station search results for VoiceOver users. • Onboarding Announcements: Swiping through the setup guide now clearly announces page numbers (e.g., "Page 2 of 5"). • Scanner Audio Cues: The automatic scanner now gives a three-second warning before advancing, so you're never surprised by a station change. • Map & Sheet Navigation: Improved VoiceOver focus handling for map server details and connection error screens. • Semantic Grouping: Cleaned up labels on the Acknowledgements screen, Filter chips, and Retry buttons to remove "image noise" and provide clear descriptions. • Platform Announcements: The new macOS compatibility banner features automatic VoiceOver announcements and semantic grouping, ensuring the platform-specific guidance is immediately clear to blind and low-vision users. • Accessibility improvements will keep being added as feedback is given