partial fix for teacher class progress

app/Services/ClassProgress/ClassProgressMetaService.php

@@ -151,4 +151,51 @@ class ClassProgressMetaService
 
         return $options;
     }
+
+    public function unitOptions(?int $classId, ?string $schoolYear = null): array
+    {
+        $curriculum = $this->curriculumOptions($classId, $schoolYear);
+        $units = [];
+
+        foreach ($curriculum as $slug => $rows) {
+            $seen = [];
+            $units[$slug] = [];
+
+            foreach ($rows as $row) {
+                $unitNumber = $row->unit_number ?? null;
+                $unitTitle = trim((string) ($row->unit_title ?? ''));
+
+                if ($unitNumber === null && $unitTitle === '') {
+                    continue;
+                }
+
+                $key = ((string) $unitNumber).'|'.$unitTitle;
+                if (isset($seen[$key])) {
+                    continue;
+                }
+
+                $seen[$key] = true;
+                $units[$slug][] = [
+                    'unit_number' => $unitNumber !== null ? (int) $unitNumber : null,
+                    'unit_title' => $unitTitle,
+                    'label' => $this->formatUnitLabel($unitNumber !== null ? (int) $unitNumber : null, $unitTitle),
+                ];
+            }
+        }
+
+        return $units;
+    }
+
+    private function formatUnitLabel(?int $unitNumber, string $unitTitle): string
+    {
+        if ($unitNumber !== null && $unitTitle !== '') {
+            return 'Unit '.$unitNumber.' - '.$unitTitle;
+        }
+
+        if ($unitNumber !== null) {
+            return 'Unit '.$unitNumber;
+        }
+
+        return $unitTitle;
+    }
 }