The web UI records keybinds as djb2 hashes of DOM event.code strings
(e.g. "KeyM" → 2090563626), but uiohook fires native scan codes
(e.g. M → 50). These never matched, so global keybinds only worked
in-focus via the web fallback, never out-of-focus via the native hook.
Add a uiohook-to-DOM-code mapping table and pre-compute the djb2
hashes so pressedKeys uses the same numbering as the keybind store.
Installs uiohook-napi for OS-level non-consuming input hooks, creates
KeybindManager class that receives keybind configs from the renderer,
matches the OS-wide key/mouse event stream, and sends matched actions
back via IPC. Exposes syncKeybinds, onKeybindAction, onAccessibilityStatus,
onKeybindHookError, and checkAccessibility APIs through the preload bridge.
Jannis Braun