Clear WS_CLIPCHILDREN on the client's window

The client creates its 3D view's window with it, so not adding it wasn't
enough: covered entirely by the renderer's window, the client's window got no
WM_PAINT and the client still drew about once a second.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

adapter/renderer_process.cpp

@@ -89,9 +89,10 @@ std::unique_ptr<RendererProcess> RendererProcess::start(HWND window, protocol::V
                            .reserved = 0};
 
     // The renderer's window goes on top of the client's 3D view, as a child window. The client's window mustn't clip
-    // its children (WS_CLIPCHILDREN): the client draws a frame when its window gets WM_PAINT, which a window entirely
-    // covered by clipped children never gets (it then drew about once a second). The renderer's swap chain is a flip
-    // model one, which the compositor shows above the client's drawing anyway.
+    // its children (WS_CLIPCHILDREN, which the client creates it with): the client draws a frame when its window gets
+    // WM_PAINT, which a window entirely covered by clipped children never gets (it then drew about once a second). The
+    // renderer's swap chain is a flip model one, which the compositor shows above the client's drawing anyway.
+    SetWindowLongW(window, GWL_STYLE, GetWindowLongW(window, GWL_STYLE) & ~WS_CLIPCHILDREN);
     const auto exe = running_copy(module_folder() / L"t5de-renderer.exe");
     std::wstring command = std::format(L"\"{}\" --channel {} --parent {}", exe.wstring(), name, GetCurrentProcessId());
     STARTUPINFOW startup{.cb = sizeof(STARTUPINFOW)};