docs 22 D-on probe + app-quit teardown spec; bump wx (alignment) + kicad (root identity)

The D-on probe (wxWASM_STAR_DISPATCH=1 on top of D5) is measured and
recorded in doc 22 §10: the week's 'environmental cliff' was adopted-fiber-
stack alignment (trap 1, fixed in wx - retires the D5 entry's findings 2-3
with a mechanism); with it fixed D5+D reached 388 passed; the remaining
reds decompose into three named Phase B gaps (wake ordering on a running
context, finished-coroutine transfer livelock, invocation-aware root
routing), each with a deterministic repro suite. D parks again behind the
switch until Phase B owns coroutine lifetimes.

app-quit.spec.ts + a wx_test_quit hook in minimal_test drive a real
File->Quit-shaped exit through D5's detached teardown (loop exits on its
context, S6 latch 'clean', OnExit + wxUninitialize there) - green in the
D-on probe, closing the D5 teardown-gate open item.

Landing state (D off): coroutine + coroutine-pthread + app-quit green;
nested red at case 3 in the pre-existing doc-19 wake-window family
(cases 1-2, yesterday's blockers, now pass); races wakeup_during_transition
stays layout-sensitive. Both are the class the C+B+E flip removes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LBjomQfKyRa3jBdeAKpmTw

tests/apps/minimal_test.cpp

@@ -20,8 +20,19 @@
 #include "wx/spinctrl.h"
 #include "wx/srchctrl.h"
 
+#include <emscripten.h>
+
 #include <vector>
 
+// Quit hook for the app-quit teardown spec (docs/features/async/22 D5): close
+// the main frame exactly as File->Quit would, so the spec can drive a real
+// app exit through the detached main-loop teardown path from JS.
+extern "C" void EMSCRIPTEN_KEEPALIVE wx_test_quit()
+{
+    if (wxTheApp && wxTheApp->GetTopWindow())
+        wxTheApp->GetTopWindow()->Close(true);
+}
+
 // Control IDs
 enum {
     ID_BTN_TEST = wxID_HIGHEST + 1,