Fix remaining API issues and borrow conflicts

- Rename display param to target_display to avoid tracing conflict
- Refactor session loop to avoid holding borrow across handle_message

agent/src/capture/dxgi.rs

@@ -55,7 +55,7 @@ impl DxgiCapturer {
 
     /// Create D3D device and output duplication
     fn create_duplication(
-        display: &Display,
+        target_display: &Display,
     ) -> Result<(ID3D11Device, ID3D11DeviceContext, IDXGIOutputDuplication, DXGI_OUTDUPL_DESC)> {
         unsafe {
             // Create DXGI factory
@@ -63,7 +63,7 @@ impl DxgiCapturer {
                 .context("Failed to create DXGI factory")?;
 
             // Find the adapter and output for this display
-            let (adapter, output) = Self::find_adapter_output(&factory, display)?;
+            let (adapter, output) = Self::find_adapter_output(&factory, target_display)?;
 
             // Create D3D11 device
             let mut device: Option<ID3D11Device> = None;
@@ -100,7 +100,7 @@ impl DxgiCapturer {
                 "Created DXGI duplication: {}x{}, display: {}",
                 desc.ModeDesc.Width,
                 desc.ModeDesc.Height,
-                &display.name
+                target_display.name
             );
 
             Ok((device, context, duplication, desc))