Fix bed management: preserve camaId from frontend to backend

- Use camaId generated in frontend instead of generating new one in backend API
- Remove patientId and internacionId from cama table (use internaciones table instead)
- Fix discharge: delete cama if fuera de area, mark available otherwise
- Fix MapaCamas to find patient via internaciones table

server/api-mariadb.js

@@ -239,7 +239,10 @@ app.put('/api/camas/:id', async (req, res) => {
 
 app.post('/api/camas', async (req, res) => {
   try {
-    const cama = { ...req.body, id: generateUUID() };
+    const cama = req.body;
+    if (!cama.id) {
+      cama.id = generateUUID();
+    }
     await createCama(cama);
     res.json(cama);
   } catch (err) {

server/db-mariadb.js

@@ -1,6 +1,18 @@
 import * as mariadb from 'mariadb';
 import * as bcrypt from 'bcryptjs';
 
+// UUID generator
+export function generateUUID() {
+  if (typeof crypto !== 'undefined' && typeof crypto.randomUUID === 'function') {
+    return crypto.randomUUID();
+  }
+  return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0;
+    const v = c === 'x' ? r : (r & 0x3) | 0x8;
+    return v.toString(16);
+  });
+}
+
 // MariaDB connection pool
 const pool = mariadb.createPool({
   host: process.env.DB_HOST || '10.9.8.135',
@@ -350,9 +362,10 @@ export async function getCamaById(id) {
 }
 
 export async function createCama(cama) {
+  const id = cama.id || generateUUID();
   await query(
     'INSERT INTO camas (id, numero, areaId, tipo, estado) VALUES (?, ?, ?, ?, ?)',
-    [cama.id, cama.numero, cama.areaId, cama.tipo, cama.estado]
+    [id, cama.numero, cama.areaId, cama.tipo, cama.estado]
   );
 }