fe_comment v2: FE-user feedback tickets with summary, uploads and API

- Replace the v1 submit endpoint with a full JSON API under
  /api/fe-comment/ (state, feedback create/update/delete, uploads,
  summary notes/recipients, submit), guarded by frontend login and a
  configurable FE user group; unauthorized callers get {"allowed":false}
- New models: tx_fecomment_summary (one open ticket per user, status
  open/sent) and tx_fecomment_feedback (url, RTE note, FAL attachments),
  both editable in the backend on the ticket storage page
- FeedbackApiMiddleware registered after frontend authentication (the
  frontend.user attribute does not exist earlier); uploads land in
  fileadmin/fe_comment/summary-<uid>/ with mime/extension check, 20 MB cap
- Submit sends one HTML mail (author block, items with attachment links,
  reply-to = FE user mail) to selected recipients with mailTo fallback,
  then closes the summary
- felogin wired React-compatible: felogin.pid=520 plus headless FeLogin
  JSON templates via site settings - felogin v14 and EXT:headless both
  claim templateRootPaths.10, the felogin.view.* settings feed exactly
  that index, so the structured JSON form (incl. __RequestToken) wins
- Read the sys_file_reference insert id before syncAttachmentCount():
  DBAL throws "no identity value" once the count UPDATE has run
- migrations: drop_fecomment_tables.php (repairs the no-uid tables,
  only drops when empty), check_feuser.php (login diagnosis),
  fec_login_test.sh / fec_api_test.sh (curl chains incl. CSRF token flow)

migrations/drop_fecomment_tables.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * One-time repair 2026-10-02: the fe_comment tables were created while the
+ * TCA cache was stale, so TYPO3's schema enrichment (uid/pid/...) never ran
+ * and MySQL cannot add an auto-increment PK afterwards. Both tables are
+ * still EMPTY - drop them and let extension:setup recreate them properly.
+ *
+ * Usage: php migrations/drop_fecomment_tables.php
+ *        (then: vendor/bin/typo3 cache:flush && vendor/bin/typo3 extension:setup)
+ */
+
+$root = null;
+$dir = __DIR__;
+for ($i = 0; $i < 5; $i++) {
+    if (is_file($dir . '/config/system/settings.php')) { $root = $dir; break; }
+    $dir = dirname($dir);
+}
+if ($root === null) { exit("Could not locate project root above " . __DIR__ . "\n"); }
+$settings = require $root . '/config/system/settings.php';
+$db = $settings['DB']['Connections']['Default'];
+$pdo = new PDO(
+    sprintf('mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4', $db['host'] ?? 'localhost', $db['port'] ?? 3306, $db['dbname'] ?? ''),
+    $db['user'] ?? '', $db['password'] ?? '',
+    [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION]
+);
+foreach (['tx_fecomment_summary', 'tx_fecomment_feedback'] as $table) {
+    $count = 0;
+    try { $count = (int)$pdo->query('SELECT COUNT(*) FROM `' . $table . '`')->fetchColumn(); } catch (\Throwable) { echo "$table: existiert nicht - ok\n"; continue; }
+    if ($count > 0) { exit("$table enthaelt $count Zeilen - ABBRUCH, nicht droppen!\n"); }
+    $pdo->exec('DROP TABLE `' . $table . '`');
+    echo "$table: geloescht (war leer)\n";
+}
+echo "Fertig. Jetzt: vendor/bin/typo3 cache:flush && vendor/bin/typo3 extension:setup\n";