feat(mac): add Qwen3 MLX streaming dictation

Replace the Sherpa offline pipeline with native MLX streaming, resilient model downloads, live transcript previews, and supporting tests and documentation.

OSGKeyboard/Services/OpenSourceLicenseCatalog.swift

@@ -6,8 +6,8 @@
 //
 // Keep this list aligned with bundled resources and runtime downloads.
 //
-// iOS targets remain zero-SPM. macOS local ASR downloads the sherpa-onnx
-// runtime binary on demand; model weights are cached under Application Support.
+// iOS targets remain zero-SPM. macOS local ASR links mlx-audio-swift (vendored
+// under ThirdParty/) for Qwen3 MLX streaming; model weights download via catalog.
 
 import Foundation
 
@@ -35,12 +35,12 @@ enum OpenSourceLicenseCatalog {
             licenseText: apache2Text
         ),
         .init(
-            id: "sherpa-onnx",
-            name: "sherpa-onnx",
-            licenseName: "Apache-2.0",
-            purpose: "macOS local ASR runtime (`sherpa-onnx-offline`) downloaded at install time and cached on device.",
-            url: URL(string: "https://github.com/k2-fsa/sherpa-onnx"),
-            licenseText: apache2Text
+            id: "mlx-audio-swift",
+            name: "mlx-audio-swift",
+            licenseName: "MIT",
+            purpose: "macOS local Qwen3 MLX streaming ASR (MLXAudioSTT), linked only in the Mac app target.",
+            url: URL(string: "https://github.com/Blaizzy/mlx-audio-swift"),
+            licenseText: mitText
         ),
     ]
 
@@ -63,4 +63,26 @@ enum OpenSourceLicenseCatalog {
     implied. See the License for the specific language governing
     permissions and limitations under the License.
     """
+
+    static let mitText = """
+    MIT License
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE.
+    """
 }