fix(transcription): medium quantized model only exists as q5_0 upstream

src-tauri/src/transcription/models.rs

@@ -40,7 +40,9 @@ const CATALOG: &[Catalog] = &[
         multilingual: false,
     },
     Catalog {
-        id: "medium.en-q5_1",
+        // ggerganov/whisper.cpp only ships a q5_0 quantization for medium
+        // (q5_1 doesn't exist upstream for this size) — q5_1 here 404s.
+        id: "medium.en-q5_0",
         label: "Medium (English, quantized) — best accuracy, slowest",
         size_mb: 540,
         multilingual: false,
@@ -64,7 +66,8 @@ const CATALOG: &[Catalog] = &[
         multilingual: true,
     },
     Catalog {
-        id: "medium-q5_1",
+        // Same upstream-availability caveat as medium.en above.
+        id: "medium-q5_0",
         label: "Medium (multilingual, quantized) — best accuracy, slowest",
         size_mb: 540,
         multilingual: true,