fix(windows): gate with_webview call to Windows only

with_webview is not available on Linux; break the builder chain and apply
it conditionally so the Linux build compiles without the wry feature flag.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src-tauri/src/lib.rs

@@ -63,33 +63,31 @@ pub fn run() {
             };
 
             let app_handle = app.handle().clone();
-            WebviewWindowBuilder::new(app, "main".to_string(), window_url)
+            let builder = WebviewWindowBuilder::new(app, "main".to_string(), window_url)
                 .title("Cinny")
                 .disable_drag_drop_handler()
                 .on_new_window(move |url, _features| {
                     let _ = app_handle.opener().open_url(url.as_str(), None::<&str>);
                     NewWindowResponse::Deny
-                })
-                .with_webview(|webview| {
-                    #[cfg(target_os = "windows")]
-                    {
-                        use webview2_com::Microsoft::Web::WebView2::Win32::ICoreWebView2PermissionRequestedEventHandler;
-                        use windows::core::EventRegistrationToken;
-                        use win_permissions::PermissionHandler;
+                });
 
-                        let controller = webview.controller();
-                        if let Ok(core) = unsafe { controller.CoreWebView2() } {
-                            let handler: ICoreWebView2PermissionRequestedEventHandler =
-                                PermissionHandler.into();
-                            // Register the handler; token is unused since we never unregister.
-                            // If this fails to compile, try: unsafe { core.add_PermissionRequested(&handler) }
-                            let mut token = EventRegistrationToken(0);
-                            let _ = unsafe { core.add_PermissionRequested(&handler, &mut token) };
-                            std::mem::forget(handler);
-                        }
-                    }
-                })
-                .build()?;
+            #[cfg(target_os = "windows")]
+            let builder = builder.with_webview(|webview| {
+                use webview2_com::Microsoft::Web::WebView2::Win32::ICoreWebView2PermissionRequestedEventHandler;
+                use windows::core::EventRegistrationToken;
+                use win_permissions::PermissionHandler;
+
+                let controller = webview.controller();
+                if let Ok(core) = unsafe { controller.CoreWebView2() } {
+                    let handler: ICoreWebView2PermissionRequestedEventHandler =
+                        PermissionHandler.into();
+                    let mut token = EventRegistrationToken(0);
+                    let _ = unsafe { core.add_PermissionRequested(&handler, &mut token) };
+                    std::mem::forget(handler);
+                }
+            });
+
+            builder.build()?;
             Ok(())
         })
         .run(context)