fix: simplify RenderDocCapture usage with TriggerCapture

- Remove BeginCapture/EndCapture complexity for manual frame capture
- Use TriggerCapture for single frame capture (simpler API)
- Move TriggerCapture before Present to ensure frame is captured
- Add SetForegroundWindow/SetFocus before TriggerCapture
- Remove default capture path in Initialize to allow SetCaptureFilePath to work

engine/src/Debug/RenderDocCapture.cpp

@@ -29,7 +29,6 @@ bool RenderDocCapture::Initialize(void* device, void* window) {
     m_api->SetCaptureOptionU32(2, 1);
     m_api->SetCaptureOptionU32(8, 1);
     m_api->SetCaptureOptionU32(9, 1);
-    m_api->SetCaptureFilePathTemplate(".\\captures");
 
     m_initialized = true;
     Logger::Get().Info(LogCategory::General, "RenderDocCapture initialized successfully");
@@ -176,6 +175,10 @@ void RenderDocCapture::TriggerCapture() {
     if (!m_isLoaded || !m_api) {
         return;
     }
+    if (m_window) {
+        SetForegroundWindow((HWND)m_window);
+        SetFocus((HWND)m_window);
+    }
     m_api->TriggerCapture();
 }