PCLink 4.2.1

Added

• Real-time desktop streaming preview powered by the native FerrumCast GStreamer engine with WebRTC and RTP support.
• Interactive system diagnostics tool within the control panel to analyze platform support for screen capture, display servers, and hardware encoders.
• Comprehensive Macro management dashboard to create, edit, run, duplicate, and delete automated task chains with JSON persistence.
• Modern side details panel for devices and files with full expand and fullscreen toggles.
• Jinja2 templating system for dynamic page rendering.

Changed

• Modularized the monolithic Web UI frontend scripts into dedicated files for core utilities, device fleet, macros, phone operations, and desktop streaming.
• Updated Linux package definitions to dynamically reference modular system and GStreamer dependencies.
• Migrated blocking system command execution, local file operations, and terminal shell interfaces to asynchronous thread pools.

Improved

• Refactored file downloader to utilize fast, native system file responses.
• Re-optimized input rate limiter to leverage clock-resilient monotonic timing and highly efficient queue manipulations.

Fixed

• Patched potential file upload memory exhaustion vulnerabilities by enforcing strict buffer ceilings.
• Resolved authentication bypass vectors by strictly validating WebSocket terminal connections and verifying API credentials prior to upgrades.
• Prevented path traversal vulnerabilities by enforcing strict UUID formats on transfers and doubly validating file browser execution targets.