Add test coverage for remaining controllers, fix label accessibility, refactor duplicated code

New tests (47 added, 622 total):
- MonitorMessengerCommand: no failures, failures with email, null error, multiple (4)
- UnsubscribeController: unsubscribe with invitations refused + admin notified (1)
- AdminController: suspend/reactivate orga, orders page with filters, logs, invite orga submit/empty, delete/resend invitation, export CSV/PDF (13)
- AccountController: export CSV/PDF, getAllowedBilletTypes (free/basic/sur-mesure/null), billet type restriction, finance stats all statuses, soldCounts (9)
- HomeController: city filter, date filter, all filters combined, stock route (4)
- OrderController: event ended, invalid cart JSON, invalid email, stock zero (4)
- MailerService: getAdminEmail, getAdminFrom (2)
- JS: comment node, tabs missing panel/id/parent, cart stock polling edge cases (10)

Accessibility fixes:
- events.html.twig: add for/id on search, city, date labels
- admin/orders.html.twig: add for/id on search, status labels

Code quality:
- cart.js: remove dead ternaire branch (max > 10 always plural)
- tabs.js: use optional chaining for tablist?.setAttribute
- MeilisearchConsistencyCommand: extract diffAndReport() (was duplicated 3x)
- Email templates: extract _order_items_table.html.twig partial
- SonarQube: exclude src/Entity/** from CPD

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/Service/MailerServiceTest.php

@@ -53,6 +53,18 @@ class MailerServiceTest extends TestCase
         );
     }
 
+    public function testGetAdminEmail(): void
+    {
+        $service = $this->createService();
+        self::assertSame('contact@test.com', $service->getAdminEmail());
+    }
+
+    public function testGetAdminFrom(): void
+    {
+        $service = $this->createService();
+        self::assertSame('E-Ticket <contact@test.com>', $service->getAdminFrom());
+    }
+
     public function testSendEmailSkipsUnsubscribedRecipient(): void
     {
         $this->unsubscribeManager->method('isUnsubscribed')->willReturn(true);