Added a curve composition feature to the curve tool, allowing users to sequentially combine two curves into a new editable polyline while preserving deadzone configurations.

Added support for reading native HID battery reports from PlayStation (DualSense / DualSense Edge / DualShock 4) controllers, displaying real-time battery levels, charging states, and low-battery alerts in the title bar and device inspector.

Added comprehensive Japanese (日本語) localization with automatic system locale detection, while refining multilingual text phrasing and typography across the interface.

Optimized Gamepad Overlay rendering and layout presentation, improving visual clarity for OBS browser sources and desktop overlay scenarios.