Feat/spa rewrite drafts flags

.gitignore

@@ -16,3 +16,6 @@ catalog-shacl.ttl
 /node_modules
 /test/tmp
 /.idea
+
+dist/
+.vercel

dev-server.js

@@ -0,0 +1,82 @@
+#!/usr/bin/env node
+// Minimal static dev server with SPA fallback.
+// Serves files from the project root; for any GET that does not resolve
+// to an existing file (e.g. /apps, /learning), responds with index.html.
+
+import http from 'node:http';
+import fs from 'node:fs';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
+
+const root = path.dirname(fileURLToPath(import.meta.url));
+const port = Number(process.env.PORT || 8765);
+
+const MIME = {
+  '.html': 'text/html; charset=utf-8',
+  '.js':   'application/javascript; charset=utf-8',
+  '.mjs':  'application/javascript; charset=utf-8',
+  '.css':  'text/css; charset=utf-8',
+  '.json': 'application/json; charset=utf-8',
+  '.webmanifest': 'application/manifest+json; charset=utf-8',
+  '.svg':  'image/svg+xml',
+  '.png':  'image/png',
+  '.jpg':  'image/jpeg',
+  '.jpeg': 'image/jpeg',
+  '.gif':  'image/gif',
+  '.ico':  'image/x-icon',
+  '.ttl':  'text/turtle; charset=utf-8',
+  '.shce': 'text/plain; charset=utf-8',
+  '.txt':  'text/plain; charset=utf-8',
+  '.map':  'application/json; charset=utf-8',
+  '.woff': 'font/woff',
+  '.woff2':'font/woff2',
+};
+
+function safeJoin(base, p){
+  const target = path.normalize(path.join(base, p));
+  if(!target.startsWith(base)) return null;
+  return target;
+}
+
+function send(res, status, body, type='text/plain; charset=utf-8'){
+  res.writeHead(status, { 'Content-Type': type, 'Cache-Control': 'no-cache' });
+  res.end(body);
+}
+
+const server = http.createServer((req, res) => {
+  try {
+    const url = new URL(req.url, 'http://localhost');
+    const decoded = decodeURIComponent(url.pathname);
+    const target = safeJoin(root, decoded);
+    if(!target){ return send(res, 400, 'Bad path'); }
+
+    fs.stat(target, (err, stat) => {
+      if(!err && stat.isFile()){
+        const ext = path.extname(target).toLowerCase();
+        res.writeHead(200, { 'Content-Type': MIME[ext] || 'application/octet-stream', 'Cache-Control': 'no-cache' });
+        fs.createReadStream(target).pipe(res);
+        return;
+      }
+      // SPA fallback: serve index.html ONLY for top-level app routes (no `.`
+      // in the last segment, and not under /node_modules or /viewer where a
+      // missing file is a real 404). This avoids masking bad ESM imports.
+      const last = decoded.split('/').pop() || '';
+      const isAssetPath = decoded.startsWith('/node_modules/') ||
+                          decoded.startsWith('/viewer/') ||
+                          decoded.startsWith('/assets/');
+      if(!last.includes('.') && !isAssetPath){
+        const idx = path.join(root, 'index.html');
+        res.writeHead(200, { 'Content-Type': MIME['.html'], 'Cache-Control': 'no-cache' });
+        fs.createReadStream(idx).pipe(res);
+        return;
+      }
+      send(res, 404, 'Not found: ' + decoded);
+    });
+  } catch(e){
+    send(res, 500, String(e));
+  }
+});
+
+server.listen(port, () => {
+  console.log(`Solid Resources Catalog dev server: http://localhost:${port}/`);
+});