Add EmailJS integration for free email sending

- Install @emailjs/browser for client-side email
- Update prayer submission to send immediate emails via EmailJS
- Add EmailJS configuration to environment variables
- Update README with EmailJS setup instructions
- Keep server-side scheduled emails for cron jobs

package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.1.0",
       "dependencies": {
         "@dataconnect/generated": "file:src/dataconnect-generated",
+        "@emailjs/browser": "^4.4.1",
         "firebase": "^12.4.0",
         "next": "16.0.0",
         "next-pwa": "^5.6.0",
@@ -1479,6 +1480,15 @@
       "resolved": "src/dataconnect-generated",
       "link": true
     },
+    "node_modules/@emailjs/browser": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/@emailjs/browser/-/browser-4.4.1.tgz",
+      "integrity": "sha512-DGSlP9sPvyFba3to2A50kDtZ+pXVp/0rhmqs2LmbMS3I5J8FSOgLwzY2Xb4qfKlOVHh29EAutLYwe5yuEZmEFg==",
+      "license": "BSD-3-Clause",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/@emnapi/core": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/@emnapi/core/-/core-1.6.0.tgz",