Windowed GUI: wm module, input routing, and the paint app

- Add the wm window-manager facility per ADR 0004: overlapping
  pixel-surface windows, damage-rectangle compositing, WM-drawn title
  bar, focus/minimize/close, and F1-F4 keybindings
- Add gop shadow compositing primitives and vt::repaint_region so the
  console stays layer 0 beneath windows
- Route mouse (absolute coords, press/release edges) and keyboard
  (focus-aware input pump) to the focused window
- Add the rspaint drawing-program crate (pen, 8 colors, clear) and shell
  draw/windows/restore commands
- Extend TaskMsg with AppMouse/Focus/Close and document the design in
  CONTEXT.md + ADR 0004

1 files changed, 5 insertions, 0 deletions

diff --git a/rsdos/src/main.rs b/rsdos/src/main.rs
index 0e159e6..89df5ea 100644
--- a/rsdos/src/main.rs
+++ b/rsdos/src/main.rs
@@ -418,6 +418,11 @@ pub unsafe extern "efiapi" fn efi_main(image_handle: Handle, system_table: *mut
     // later, and prints the exact field values when it is.
     rsnix::vt::debug_verify();
 
+    // Windowed GUI: initialise the window manager and its input pump.
+    // The console (vt) stays layer 0; GUI apps are windows composited on top.
+    rsnix::wm::init();
+    rsnix::wm::spawn_input_pump();
+
     shell::run();
 }