fix(platform): Linux/Windows compile fixes from f1c9cd2 HiDPI commit

- linux: wrap raw_display in Some() — wgpu 29 RawHandle expects
  Option<RawDisplayHandle>, not RawDisplayHandle
- windows: same Some() wrap on the WindowsDisplayHandle path
- windows: add Win32_UI_HiDpi feature so SetProcessDpiAwarenessContext /
  GetDpiForSystem / GetDpiForWindow imports resolve

Caught by the new test.yml CI matrix on first run — these regressions
shipped in f1c9cd2 (cross-platform HiDPI) which compiled only on macOS.
Build-only fixes; remaining cross-platform issues (Linux Jolt linker,
Windows wgpu test failures) tracked in separate GitHub issues.

Author: proggeramlug

native/linux/src/lib.rs

@@ -274,7 +274,7 @@ pub extern "C" fn bloom_init_window(width: f64, height: f64, title_ptr: *const u
                 )
             );
             instance.create_surface_unsafe(wgpu::SurfaceTargetUnsafe::RawHandle {
-                raw_display_handle: raw_display,
+                raw_display_handle: Some(raw_display),
                 raw_window_handle: raw_window,
             }).expect("Failed to create surface")
         };

native/windows/Cargo.toml

@@ -20,6 +20,7 @@ wgpu = "29"
 windows = { version = "0.58", features = [
     "Win32_Foundation",
     "Win32_UI_WindowsAndMessaging",
+    "Win32_UI_HiDpi",
     "Win32_UI_Input_KeyboardAndMouse",
     "Win32_Graphics_Gdi",
     "Win32_System_LibraryLoader",

native/windows/src/lib.rs

@@ -309,9 +309,9 @@ pub extern "C" fn bloom_init_window(width: f64, height: f64, title_ptr: *const u
             );
             let raw = raw_window_handle::RawWindowHandle::Win32(handle);
             instance.create_surface_unsafe(wgpu::SurfaceTargetUnsafe::RawHandle {
-                raw_display_handle: raw_window_handle::RawDisplayHandle::Windows(
+                raw_display_handle: Some(raw_window_handle::RawDisplayHandle::Windows(
                     raw_window_handle::WindowsDisplayHandle::new()
-                ),
+                )),
                 raw_window_handle: raw,
             }).expect("Failed to create surface")
         };