feat: implement AI-powered Human-in-the-Loop Norm Builder interface and standard CRUD endpoints

server.js

@@ -137,6 +137,87 @@ const server = http.createServer((req, res) => {
   }
   // --- END CATEGORIES CRUD ---
 
+  // --- STANDARDS CRUD ---
+  const STANDARDS_FILE = path.join(CONFIG_DIR, 'standards.json');
+  const readStandards = () => {
+    if (fs.existsSync(STANDARDS_FILE)) {
+      try { return JSON.parse(fs.readFileSync(STANDARDS_FILE, 'utf-8')); } catch (e) {}
+    }
+    return [];
+  };
+
+  if (pathname === '/api/standards') {
+    if (req.method === 'GET') {
+      res.writeHead(200, { 'Content-Type': 'application/json' });
+      const allStandards = readStandards();
+      const catId = parsedUrl.searchParams.get('categoryId');
+      if (catId) {
+        res.end(JSON.stringify(allStandards.filter(s => s.categoria_id === catId)));
+      } else {
+        res.end(JSON.stringify(allStandards));
+      }
+      return;
+    }
+    
+    if (req.method === 'POST' || req.method === 'PUT') {
+      let body = '';
+      req.on('data', chunk => body += chunk.toString());
+      req.on('end', () => {
+        try {
+          const standard = JSON.parse(body);
+          
+          // Sanitização numérica para parametros_controle
+          if (standard.parametros_controle) {
+            for (const key of Object.keys(standard.parametros_controle)) {
+               const grupo = standard.parametros_controle[key];
+               if (typeof grupo === 'object' && grupo !== null) {
+                  for (const prop of Object.keys(grupo)) {
+                     const val = grupo[prop];
+                     if (val !== null && val !== undefined && val !== '') {
+                        const num = parseFloat(val);
+                        if (!isNaN(num)) {
+                           grupo[prop] = num;
+                        }
+                     }
+                  }
+               }
+            }
+          }
+
+          let standards = readStandards();
+          if (req.method === 'POST') {
+            standard.id = Date.now().toString();
+            standards.push(standard);
+          } else {
+            const index = standards.findIndex(s => s.id === standard.id);
+            if (index !== -1) standards[index] = { ...standards[index], ...standard };
+          }
+          fs.writeFileSync(STANDARDS_FILE, JSON.stringify(standards, null, 2));
+          res.writeHead(200, { 'Content-Type': 'application/json' });
+          res.end(JSON.stringify(standard));
+        } catch (err) {
+          res.writeHead(400); res.end(JSON.stringify({ error: 'Invalid payload' }));
+        }
+      });
+      return;
+    }
+
+    if (req.method === 'DELETE') {
+      const id = parsedUrl.searchParams.get('id');
+      if (id) {
+        let standards = readStandards();
+        standards = standards.filter(s => s.id !== id);
+        fs.writeFileSync(STANDARDS_FILE, JSON.stringify(standards, null, 2));
+        res.writeHead(200, { 'Content-Type': 'application/json' });
+        res.end(JSON.stringify({ success: true }));
+      } else {
+        res.writeHead(400); res.end(JSON.stringify({ error: 'Missing id' }));
+      }
+      return;
+    }
+  }
+  // --- END STANDARDS CRUD ---
+
   // Serve static files
   let filePath = path.join(DIST_DIR, req.url === '/' ? 'index.html' : req.url);