Backends: WebGPU: minor build fix for Emscripten 5.0.0 (note: our examples currently don't build with 5.0.1).

Getting 'warning: unused function 'CreateWGPUSurface' [-Wunused-function]' in some build paths.
cc #9246

backends/imgui_impl_wgpu.h

diff --git a/backends/imgui_impl_wgpu.h b/backends/imgui_impl_wgpu.h
index 7ab3dd3..5222345 100644
--- a/backends/imgui_impl_wgpu.h
+++ b/backends/imgui_impl_wgpu.h
@@ -33,12 +33,21 @@
 // Setup Emscripten default if not specified.
 #if defined(__EMSCRIPTEN__) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_DAWN) && !defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU)
 #include <emscripten/version.h>
+
+#ifdef __EMSCRIPTEN_MAJOR__
+#if (__EMSCRIPTEN_MAJOR__ >= 4) && (__EMSCRIPTEN_MINOR__ >= 0) && (__EMSCRIPTEN_TINY__ >= 10)
+#define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
+#else
+#define IMGUI_IMPL_WEBGPU_BACKEND_WGPU
+#endif
+#else
 #if (__EMSCRIPTEN_major__ >= 4) && (__EMSCRIPTEN_minor__ >= 0) && (__EMSCRIPTEN_tiny__ >= 10)
 #define IMGUI_IMPL_WEBGPU_BACKEND_DAWN
 #else
 #define IMGUI_IMPL_WEBGPU_BACKEND_WGPU
 #endif
 #endif
+#endif
 
 #include <webgpu/webgpu.h>
 #if defined(IMGUI_IMPL_WEBGPU_BACKEND_WGPU) && !defined(__EMSCRIPTEN__)

docs/CHANGELOG.txt

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 46c23c68..19a9e72 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -259,6 +259,7 @@
     selects `VkSwapchainCreateInfoKHR`'s `compositeAlpha` value based on
     `cap.supportedCompositeAlpha`, which seems to be required on some Android
      devices. (#8784) [@FelixStach]
+  - WebGPU: fixes for Emscripten 5.0.0 (note: our examples currently don't build with 5.0.1).
   - Win32: handle `WM_IME_CHAR`/`WM_IME_COMPOSITION` to support Unicode inputs on
     MBCS (non-Unicode) Windows. (#9099, #3653, #5961) [@ulhc, @ocornut, @Othereum]
   - Win32: minor optimization not submitting gamepad input if packet number has not

examples/example_glfw_wgpu/main.cpp

diff --git a/examples/example_glfw_wgpu/main.cpp b/examples/example_glfw_wgpu/main.cpp
index 7c293a5..1a6373c 100644
--- a/examples/example_glfw_wgpu/main.cpp
+++ b/examples/example_glfw_wgpu/main.cpp
@@ -40,8 +40,8 @@
 static int                      wgpu_surface_height = 800;
 
 // Forward declarations
-static bool         InitWGPU(GLFWwindow* window);
-static WGPUSurface  CreateWGPUSurface(const WGPUInstance& instance, GLFWwindow* window);
+static bool InitWGPU(GLFWwindow* window);
+WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, GLFWwindow* window);
 
 static void glfw_error_callback(int error, const char* description)
 {
@@ -408,7 +408,7 @@
 #endif // __EMSCRIPTEN__
 #endif // IMGUI_IMPL_WEBGPU_BACKEND_WGPU
 
-static bool InitWGPU(GLFWwindow* window)
+bool InitWGPU(GLFWwindow* window)
 {
     WGPUTextureFormat preferred_fmt = WGPUTextureFormat_Undefined;  // acquired from SurfaceCapabilities
 

examples/example_sdl3_wgpu/main.cpp

diff --git a/examples/example_sdl3_wgpu/main.cpp b/examples/example_sdl3_wgpu/main.cpp
index adf4524..c02a5be 100644
--- a/examples/example_sdl3_wgpu/main.cpp
+++ b/examples/example_sdl3_wgpu/main.cpp
@@ -40,8 +40,8 @@
 static int                      wgpu_surface_height = 800;
 
 // Forward declarations
-static bool         InitWGPU(SDL_Window* window);
-static WGPUSurface  CreateWGPUSurface(const WGPUInstance& instance, SDL_Window* window);
+static bool InitWGPU(SDL_Window* window);
+WGPUSurface CreateWGPUSurface(const WGPUInstance& instance, SDL_Window* window);
 
 static void ResizeSurface(int width, int height)
 {