Use local svgo.cmd wrapper binary

Switch SVG optimizer resolution from bin/svgo-cli.exe to bin/svgo.cmd.

Update unit tests to validate the new local binary path behavior.

Co-Authored-By: Abacus.AI CLI <agent@abacus.ai>

pptx_image_compress.py

@@ -51,6 +51,7 @@ PROGRESS_BAR_LEN = 40
 TEMP_PREFIX = "pptx_compress_"
 DEFAULT_MIN_SAVINGS = "2%"
 PNG_TO_JPEG_THRESHOLD_BYTES = 500 * 1024
+SVGO_CLI_RELATIVE_PATH = Path("bin") / "svgo-client" / "svgo.cmd"
 
 
 @dataclass
@@ -238,21 +239,23 @@ def compress_raster_image(
     )
 
 
+def get_svgo_executable_path() -> Path:
+    return Path(__file__).resolve().parent / SVGO_CLI_RELATIVE_PATH
+
+
 def compress_svg_with_svgo(
     original: Path,
     out_dir: Path,
 ) -> Path | None:
     if original.suffix.lower() not in VECTOR_EXT:
         return None
-    npx_exe = which("npx")
-    if not npx_exe:
+    svgo_exe = get_svgo_executable_path()
+    if not svgo_exe.exists() or not svgo_exe.is_file():
         return None
     out_dir.mkdir(parents=True, exist_ok=True)
     out_file = out_dir / original.name
     cmd = [
-        npx_exe,
-        "--yes",
-        "svgo",
+        str(svgo_exe),
         str(original),
         "-o",
         str(out_file),