fix(wasm): drop pthreads — fixes UI hang

wasm/build.sh

@@ -1,12 +1,12 @@
 #!/bin/bash
 # Build quant.cpp WASM demo
-# pthreads for parallel matmul + SIMD + ASYNCIFY for UI streaming
+# SIMD + ASYNCIFY for streaming (no pthreads — conflicts with ASYNCIFY sleep)
 set -e
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 PROJECT_DIR="$(dirname "$SCRIPT_DIR")"
 
-echo "=== Building quant.cpp WASM (pthreads + SIMD) ==="
+echo "=== Building quant.cpp WASM (SIMD + ASYNCIFY) ==="
 
 if ! command -v emcc &>/dev/null; then
     echo "Error: emcc not found. Install Emscripten SDK."
@@ -22,24 +22,21 @@ emcc "$SCRIPT_DIR/quant_wasm.c" \
     -msimd128 \
     -mrelaxed-simd \
     -flto \
-    -pthread \
     -s WASM=1 \
-    -s INITIAL_MEMORY=256MB \
-    -s MAXIMUM_MEMORY=4GB \
     -s ALLOW_MEMORY_GROWTH=1 \
+    -s MAXIMUM_MEMORY=4GB \
+    -s INITIAL_MEMORY=256MB \
     -s EXPORTED_FUNCTIONS='["_main","_wasm_load_model","_wasm_generate","_wasm_generate_async","_wasm_model_info","_wasm_is_ready","_malloc","_free"]' \
     -s EXPORTED_RUNTIME_METHODS='["UTF8ToString","allocateUTF8","FS"]' \
     -s FORCE_FILESYSTEM=1 \
     -s MODULARIZE=0 \
-    -s ENVIRONMENT='web,worker' \
+    -s ENVIRONMENT=web \
     -s NO_EXIT_RUNTIME=1 \
     -s ASSERTIONS=0 \
     -s STACK_SIZE=1MB \
     -s ASYNCIFY \
     -s 'ASYNCIFY_IMPORTS=["emscripten_sleep"]' \
     -s ASYNCIFY_STACK_SIZE=65536 \
-    -s PTHREAD_POOL_SIZE=4 \
-    -s PTHREAD_POOL_SIZE_STRICT=0 \
     -lm \
     -DNDEBUG \
     -D__EMSCRIPTEN__ \