Initial public release: DWG/DXF 2D viewer sample

Standalone Vite sample composing acadrust-dwg WASM, dxf-parser, and Viewer2D.

src/viewer2d/dwgParser.ts

@@ -0,0 +1,25 @@
+/**
+ * DWG parser — rust/dwg-wasm wrapper around the acadrust crate (MPL-2.0,
+ * consumed unmodified; see rust/dwg-wasm). Emits the parseResult shape
+ * Viewer2D.load() consumes. Lazy-imported so the wasm is only fetched when a
+ * DWG is actually opened.
+ *
+ * History: until 2026-07-10 this module selected between acadrust and
+ * @horu2day/pure-cad-parser (?dwgparser= toggle). The old parser was removed
+ * after side-by-side validation (PROGRESS.md Phase 15).
+ */
+
+export type CadParseResult = {
+  version?: string;
+  vars?: Record<string, unknown>;
+  entities?: unknown[];
+  tables?: Record<string, unknown>;
+  stats?: Record<string, unknown>;
+};
+
+/** Parse a DWG buffer. Returns a parseResult for Viewer2D.load(). */
+export async function parseDwgBuffer(bytes: Uint8Array): Promise<CadParseResult> {
+  const { initAcadrustParser, parseDwgAcadrust } = await import('./acadrustParser');
+  await initAcadrustParser();
+  return parseDwgAcadrust(bytes);
+}