feat: student name popover preview on /repertoire via htmx

app/src/Controllers/SearchController.php

@@ -203,6 +203,30 @@ class SearchController
      * Render the repertoire index partial and exit (for HTMX swaps).
      * Never returns.
      */
+    /**
+     * HTMX endpoint: returns a popover snippet for a student name.
+     * Renders directly and exits.
+     */
+    public function handleStudentPreview(): never {
+        $name = trim($_GET['name'] ?? '');
+        header('Content-Type: text/html; charset=UTF-8');
+
+        if ($name === '') {
+            echo '';
+            exit();
+        }
+
+        $theses = $this->db->getThesesByAuthorName($name);
+
+        if (empty($theses)) {
+            echo '';
+            exit();
+        }
+
+        include APP_ROOT . '/templates/partials/student-preview.php';
+        exit();
+    }
+
     private function renderRepertoirePartial(
         array $repData,
         array $activeFilters,