fix: enable microphone access on Linux via WebKitGTK

WebKitGTK denies getUserMedia by default. This adds webkit2gtk as a
Linux dependency and configures the webview to enable media streams
and auto-grant UserMediaPermissionRequest for microphone access.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

tauri/src-tauri/Cargo.lock

@@ -5041,7 +5041,7 @@ checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "voicebox"
-version = "0.1.12"
+version = "0.1.13"
 dependencies = [
  "base64 0.22.1",
  "core-foundation-sys",
@@ -5064,6 +5064,7 @@ dependencies = [
  "tauri-plugin-updater",
  "tokio",
  "wasapi",
+ "webkit2gtk",
  "windows 0.62.2",
 ]
 

tauri/src-tauri/Cargo.toml

@@ -37,6 +37,9 @@ core-foundation-sys = "0.8"
 wasapi = "0.22"
 windows = { version = "0.62", features = ["Win32_Foundation", "Win32_UI_WindowsAndMessaging", "Win32_System_Com"] }
 
+[target.'cfg(target_os = "linux")'.dependencies]
+webkit2gtk = "2.0"
+
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
 tauri-plugin-updater = "2.0"
 tauri-plugin-process = "2.0"

tauri/src-tauri/src/main.rs

@@ -635,6 +635,33 @@ pub fn run() {
                 }
             }
 
+            // Enable microphone access on Linux (WebKitGTK denies getUserMedia by default)
+            #[cfg(target_os = "linux")]
+            {
+                use tauri::Manager;
+                if let Some(window) = app.get_webview_window("main") {
+                    let _ = window.with_webview(|webview| {
+                        use webkit2gtk::{WebViewExt, SettingsExt, PermissionRequestExt};
+                        use webkit2gtk::glib::ObjectExt;
+                        let wk_webview = webview.inner();
+
+                        // Enable media stream support in WebKitGTK settings
+                        if let Some(settings) = WebViewExt::settings(&wk_webview) {
+                            settings.set_enable_media_stream(true);
+                        }
+
+                        // Auto-grant UserMediaPermissionRequest (microphone access)
+                        wk_webview.connect_permission_request(move |_, request: &webkit2gtk::PermissionRequest| {
+                            if request.is::<webkit2gtk::UserMediaPermissionRequest>() {
+                                request.allow();
+                                return true;
+                            }
+                            false
+                        });
+                    });
+                }
+            }
+
             Ok(())
         })
         .invoke_handler(tauri::generate_handler![