Modern UI Redesign & Stream Stability Update

🚀 What's New in v2.2

🎨 Brand New UI

• Refocused Two-View Dashboard: Streamlined the interface to focus purely on Channels and Settings (removed legacy clutter).
• Modern Dark Aesthetic: Added backdrop blurs, accent glow cards, live badges, and smooth controls.
• Real-Time Stream Stats: Monitor active recording duration, download bitrate/speed, and file size on disk directly from channel cards.
• Categorized Settings Center: Settings are now organized into 6 dedicated panes:
  • 📁 General & Storage
  • 🎬 Recording & Quality
  • 🌐 Network & Engine
  • 🔔 Notifications & Webhook testing
  • 🍪 Cookies & Auth
  • ⚙️ System & Backup

🛠️ Stability & Recording Engine Fixes

• Twitch Live Capture Fix: Fixed Twitch live recording failure caused by unsupported rewind arguments (--no-live-from-start).
• Live Webhook Testing: Added a one-click "Test Webhook" action in the settings to verify Discord/Slack alerts.
• Clean Process Management: Improved background process termination to ensure ffmpeg and yt-dlp child processes close cleanly without file locking.
• Docker Permission Updates: Resolved container permission issues for /usr/local/bin/yt-dlp updates.
• Updated Documentation: Fully refreshed README.md reflecting the new UI and architecture.