feat(reports): add Envelope, Phone Book (address+phone) and Rolodex Info reports

- PDF builders in app/reporting.py (envelope, phone+address, rolodex info)
- Endpoints in app/main.py with auth, filtering, logging, Content-Disposition
- New HTML template report_phone_book_address.html
- Rolodex bulk actions updated with buttons/links
- JS helper to submit selections to alternate endpoints

Tested via docker compose build/up and health check.

static/js/custom.js

@@ -81,6 +81,25 @@ document.addEventListener('DOMContentLoaded', function() {
         });
     });
 
+    // Submit selection to alternate endpoints using data-action
+    document.querySelectorAll('.js-submit-to').forEach(function(link) {
+        link.addEventListener('click', function(e) {
+            e.preventDefault();
+            var container = link.closest('.table-responsive') || document;
+            var form = container.querySelector('form.js-answer-table');
+            if (!form) form = document.querySelector('form.js-answer-table');
+            if (!form) return;
+            var original = form.getAttribute('action');
+            var action = link.getAttribute('data-action');
+            if (action) form.setAttribute('action', action);
+            try {
+                form.submit();
+            } finally {
+                if (original) form.setAttribute('action', original);
+            }
+        });
+    });
+
     // Field help: show contextual help from data-help on focus
     function attachFieldHelp(container) {
         if (!container) return;