fix: embed conversations data inline in chat page HTML

Instead of making a separate fetch to /admin/chat/conversations (which
Nginx intercepts), pre-load conversations in the PHP chat() method and
embed them as window.INITIAL_CONVS JSON in the page script.

renderConvs(INITIAL_CONVS) runs synchronously on page load — no HTTP
request needed. setInterval still tries to refresh via fetch every 15s
but the initial render no longer depends on it.

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

admin/DashboardController.php

@@ -1808,7 +1808,37 @@ HTML;
         SessionAuth::require();
         $user = SessionAuth::user();
         $userName = self::h($user['name'] ?? 'Admin');
-        $companies = CompanyRepository::findAll();
+
+        // Pre-load conversations for inline embedding (no extra HTTP round-trip)
+        $companyMap = [];
+        foreach (CompanyRepository::findAll() as $co) {
+            $companyMap[(int)$co['id']] = $co['name'];
+        }
+        $convRows = db()->query("
+            SELECT c.phone_number,
+                   MAX(c.contact_name) as contact_name,
+                   MAX(c.company_id)   as company_id,
+                   MAX(c.created_at)   as last_time,
+                   (SELECT content FROM conversations c2 WHERE c2.phone_number = c.phone_number ORDER BY c2.id DESC LIMIT 1) as last_message,
+                   (SELECT COUNT(*) FROM conversations c3 WHERE c3.phone_number = c.phone_number AND c3.direction = 'inbound'
+                    AND c3.id > COALESCE((SELECT MAX(c4.id) FROM conversations c4 WHERE c4.phone_number = c.phone_number AND c4.direction = 'outbound'),0)) as unread_count
+            FROM conversations c
+            GROUP BY c.phone_number
+            ORDER BY last_time DESC
+        ")->fetchAll();
+        $initialConvs = [];
+        foreach ($convRows as $r) {
+            $cid = (int)$r['company_id'];
+            $initialConvs[] = [
+                'phone'        => $r['phone_number'],
+                'contact_name' => $r['contact_name'] ?? '',
+                'company_name' => $companyMap[$cid] ?? '',
+                'last_message' => mb_substr($r['last_message'] ?? '', 0, 80),
+                'last_time'    => $r['last_time'],
+                'unread_count' => (int)$r['unread_count'],
+            ];
+        }
+        $initialConvsJson = json_encode($initialConvs, JSON_UNESCAPED_UNICODE | JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT);
 
         http_response_code(200);
         header('Content-Type: text/html; charset=utf-8');
@@ -1917,19 +1947,12 @@ HTML;
 </div>
 <script>
 let activePhone = '';
+const INITIAL_CONVS = {$initialConvsJson};
 
-// ─── Load conversations ──────────────────────────────────────────────────────
+// ─── Render conversations list ───────────────────────────────────────────────
-async function loadConvs() {
+function renderConvs(convs) {
   const list = document.getElementById('convList');
-  try {
+  if (!convs || convs.length === 0) {
-    const r = await fetch('/admin/chat?api=convs');
-    if (!r.ok) {
-      list.innerHTML = \`<div style="padding:16px;color:#e53e3e;font-size:13px">Error \${r.status} al cargar conversaciones</div>\`;
-      return;
-    }
-    const data = await r.json();
-    const convs = data.conversations || [];
-    if (convs.length === 0) {
     list.innerHTML = '<div style="padding:24px 16px;text-align:center;color:#a0a8b8;font-size:13px">Sin conversaciones aún</div>';
     return;
   }
@@ -1953,9 +1976,23 @@ async function loadConvs() {
       </div>
     </div>\`;
   }).join('');
+}
+
+// ─── Load conversations ──────────────────────────────────────────────────────
+async function loadConvs() {
+  try {
+    const r = await fetch('/admin/chat?api=convs');
+    if (!r.ok) return;
+    const data = await r.json();
+    const convs = data.conversations || [];
+    if (convs.length === 0) {
+      list.innerHTML = '<div style="padding:24px 16px;text-align:center;color:#a0a8b8;font-size:13px">Sin conversaciones aún</div>';
+      return;
+    }
+    list.innerHTML = convs.map(c => {
+      renderConvs(convs);
   } catch (e) {
     console.error('loadConvs error:', e);
-    list.innerHTML = '<div style="padding:16px;color:#e53e3e;font-size:13px">Error al cargar conversaciones. Revisa la consola.</div>';
   }
 }
 
@@ -2123,7 +2160,7 @@ if (msgInput) {
   });
 }
 
-loadConvs();
+renderConvs(INITIAL_CONVS);
 setInterval(loadConvs, 15000);
 </script>
 </body>