fix: apply Mica/Acrylic vibrancy on Windows to prevent transparent background (#12)

* fix: apply Mica/Acrylic vibrancy on Windows to prevent transparent background

The window config has transparent:true for macOS vibrancy, but only
macOS got an apply_vibrancy() call. On Windows, this left the window
fully see-through — you could see other apps through the editor.

Adds a #[cfg(target_os = "windows")] block that tries Mica first
(Windows 11 native material) and falls back to Acrylic (Windows 10
1809+). Applied in both the main window setup and create_editor_window.

The RGBA (18, 18, 18, 200) gives a dark semi-opaque base that matches
the dark theme defaults.

fixes #10

* fix: use None for Mica dark_mode, add log::warn! fallback, reword comment

Addresses code review feedback:
- Use None instead of Some(true) for Mica dark_mode, letting the system decide
- Add log::warn! when Mica is unavailable and Acrylic fallback is used
- Reword comment for clarity

Author: Artale

src-tauri/src/lib.rs

@@ -56,6 +56,17 @@ fn create_editor_window(app: &tauri::AppHandle) -> tauri::Result<()> {
         .ok();
     }
 
+    #[cfg(target_os = "windows")]
+    {
+        // Mica (Win11) provides a native translucent material; Acrylic (Win10 1809+)
+        // is the fallback. Either prevents raw transparency from tauri.conf.json.
+        if window_vibrancy::apply_mica(&window, None).is_err() {
+            log::warn!("Mica not available, falling back to Acrylic");
+            window_vibrancy::apply_acrylic(&window, Some((18, 18, 18, 200)))
+                .ok();
+        }
+    }
+
     Ok(())
 }
 
@@ -359,5 +370,15 @@ fn setup_desktop_menu(app: &tauri::App) -> Result<(), Box<dyn std::error::Error>
             .ok();
     }
 
+    #[cfg(target_os = "windows")]
+    {
+        let window = app.get_webview_window("main").unwrap();
+        if window_vibrancy::apply_mica(&window, None).is_err() {
+            log::warn!("Mica not available, falling back to Acrylic");
+            window_vibrancy::apply_acrylic(&window, Some((18, 18, 18, 200)))
+                .ok();
+        }
+    }
+
     Ok(())
 }