Generate prayer ID on server to fix crypto.randomUUID browser compat

Older browsers (and non-HTTPS contexts) don't have crypto.randomUUID.
Move ID generation to the server using Node's built-in crypto module.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DReRqHxSYuVfCzTzQGD9hZ

server.js

@@ -2,6 +2,7 @@ const express = require('express');
 const cors = require('cors');
 const fs = require('fs');
 const path = require('path');
+const { randomUUID } = require('crypto');
 
 const app = express();
 const DATA_DIR = process.env.DATA_DIR || path.join(__dirname, 'data');
@@ -50,7 +51,7 @@ app.get('/api/prayers', (req, res) => {
 app.post('/api/prayers', (req, res) => {
   try {
     const prayers = readPrayers();
-    const prayer = req.body;
+    const prayer = { id: randomUUID(), ...req.body };
     prayers.unshift(prayer);
     writePrayers(prayers);
     res.status(201).json(prayer);

src/usePrayers.ts

@@ -25,8 +25,7 @@ export function usePrayers() {
   }, []);
 
   const addPrayer = useCallback(async (request: string, tags: string[]) => {
-    const prayer: Prayer = {
-      id: crypto.randomUUID(),
+    const prayer = {
       request,
       answer: '',
       status: 'active',