fix(icons): preserve Devicon viewBox dimensions

Signed-off-by: Mr-Neutr0n <harikp2002@gmail.com>

scripts/test-build-icons-devicon.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+"""Regression tests for Devicon viewBox preservation."""
+
+from __future__ import annotations
+
+import importlib.util
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parent.parent
+BUILD = ROOT / "scripts" / "build-icons.py"
+
+
+def load_build_module():
+    sys.dont_write_bytecode = True
+    spec = importlib.util.spec_from_file_location("diagram_design_build_icons", BUILD)
+    if spec is None or spec.loader is None:
+        raise AssertionError("could not load build-icons.py")
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+def main() -> int:
+    build_icons = load_build_module()
+    svg = '<svg viewBox="0 0 32 32"><path fill="#123456" d="M0 0h32v32H0z"/></svg>'
+    normalized = build_icons.normalize_devicon(svg)
+    if 'viewBox="0 0 32 32"' not in normalized:
+        raise AssertionError(f"source viewBox was not preserved: {normalized}")
+    if 'fill="#123456"' in normalized:
+        raise AssertionError("source fill escaped currentColor normalization")
+    if 'fill="currentColor"' not in normalized:
+        raise AssertionError("normalized icon does not inherit currentColor")
+    print("PASS: Devicon normalization preserves non-128 source viewBoxes")
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())