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Expand the on-screen keyboard to a full US layout (letters, digits, punctuation, Shift layer, Tab, arrows, F1-F12, one-shot Ctrl/Alt modifiers), make it a persistent, movable, closeable panel via a title-bar drag handle, and lower its opacity. Previously the keyboard was just a second panel swapped into the same quad as the menu launcher, which made the launcher translucent too and made the keyboard and menu mutually exclusive. Extract the shared swapchain/JNI/touch-dispatch plumbing into two generic, reusable modules - xr_swapchain.c (swapchain + per-image FBO setup) and xr_overlay.c (an off-screen Android View rendered into its own OpenXR quad, hit-tested via a laser pointer) - and make the menu launcher and keyboard two independent XrOverlay instances instead of one. The controller's menu button now only opens/closes the launcher; the launcher's "Keyboard" button only opens the keyboard - so the keyboard can stay up while picking something from the menu, and only the keyboard's own Close button hides it. xr_menu.c/.h are gone, fully absorbed into xr_overlay.c. On the Java side, OverlayPanel.java carries the shared off-screen-render/touch/ cursor plumbing that MenuOverlay and the new KeyboardOverlay both subclass.