Fixed for decoder dl speed and mobile warnings on low memory devices.

src/worker/protocol.ts

@@ -47,6 +47,16 @@ export interface LoadMessage {
    * default for the device it actually selected (src/lib/models.ts).
    */
   dtype?: DtypeSpec;
+  /**
+   * Load the encoder/decoder ONNX sessions one at a time instead of
+   * concurrently (D-027/D-029). Sequential halves the peak JS-heap/WASM
+   * memory a load needs (avoiding mobile tab crashes on larger models) at
+   * the cost of losing the CDN-concurrency benefit a fast connection would
+   * otherwise get from two simultaneous downloads — worth paying only where
+   * the memory-crash risk is real. The UI computes this (`isMobileLoadRisk`
+   * in App.tsx); omitted/false loads in parallel.
+   */
+  sequentialSessionLoad?: boolean;
 }
 
 export interface TranscribeMessage {