fix: honor form failing validation due to non-standard field names

Honor form uses submitterEmail/submitterName/vetFirstName instead of
the generic email/name fields, causing all submissions to be rejected
with a 400 before reaching the spreadsheet.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

server.js

@@ -86,8 +86,10 @@ app.post('/api/submit', async (req, res) => {
   try {
     const { name, email, message, phone, subject, origin } = req.body;
 
-    if (!email && !phone && !name) {
-      // We need at least ONE piece of identifying info or data to consider it valid
+    const hasIdentifier = name || email || phone ||
+      req.body.submitterEmail || req.body.submitterName || req.body.vetFirstName ||
+      req.body.contactName || req.body.groupName;
+    if (!hasIdentifier) {
       return res.status(400).json({ error: 'Please provide at least a name, email, or phone number.' });
     }