fix: resolve workspace integration blockers (#5)

apps/viewer-3d/tools/copy-decoders.mjs

@@ -2,13 +2,30 @@
 // runtime paths /draco/ and /basis/ resolve (version-matched to installed three).
 // Also copies the web-ifc single-thread WASM to public/web-ifc/ for the IFC path.
 // Runs automatically via `npm install` (postinstall). Safe to re-run.
-import { cpSync, copyFileSync, existsSync, mkdirSync, rmSync } from 'node:fs';
+import {
+  chmodSync,
+  cpSync,
+  copyFileSync,
+  existsSync,
+  mkdirSync,
+  readdirSync,
+  rmSync,
+} from 'node:fs';
 import { dirname, resolve } from 'node:path';
 import { fileURLToPath } from 'node:url';
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
 const root = resolve(__dirname, '..');
 
+function normalizePublicModes(directory) {
+  chmodSync(directory, 0o755);
+  for (const entry of readdirSync(directory, { withFileTypes: true })) {
+    const path = resolve(directory, entry.name);
+    if (entry.isDirectory()) normalizePublicModes(path);
+    else if (entry.isFile()) chmodSync(path, 0o644);
+  }
+}
+
 const threeEntry = fileURLToPath(import.meta.resolve('three'));
 const threeRoot = resolve(dirname(threeEntry), '..');
 const libs = resolve(threeRoot, 'examples/jsm/libs');
@@ -30,6 +47,7 @@ for (const [src, dest] of targets) {
   rmSync(dest, { force: true, recursive: true });
   mkdirSync(dest, { recursive: true });
   cpSync(src, dest, { recursive: true });
+  normalizePublicModes(dest);
   console.log(`[copy-decoders] ${src} -> ${dest}`);
 }
 
@@ -42,8 +60,10 @@ if (existsSync(ifcSrcDir)) {
   for (const wasm of ['web-ifc.wasm', 'web-ifc-mt.wasm']) {
     const src = resolve(ifcSrcDir, wasm);
     if (!existsSync(src)) continue;
-    copyFileSync(src, resolve(ifcDest, wasm));
-    console.log(`[copy-decoders] ${src} -> ${resolve(ifcDest, wasm)}`);
+    const dest = resolve(ifcDest, wasm);
+    copyFileSync(src, dest);
+    chmodSync(dest, 0o644);
+    console.log(`[copy-decoders] ${src} -> ${dest}`);
   }
 } else {
   console.warn('[copy-decoders] web-ifc not installed yet — skipping IFC wasm.');