Fix semester context, attendance rosters, and billing workflows

- load global semester helpers consistently and use date-based semester defaults
- fix grading and daily attendance duplicate student/section rows
- keep attendance violations scoped to the current semester by default
- update invoice, refund, discount, payment, and financial aid flows
- add configuration cleanup migrations for duplicate calendar/semester keys
- refresh parent registration/report-card and print request handling
- update related models, services, views, cron notes, and test coverage

app/Controllers/Administrator/FinancialAidController.php

@@ -68,7 +68,7 @@ class FinancialAidController extends BaseController
                 return redirect()->back()->with('error', 'Only open requests can be approved.');
             }
 
-            $amount = (float) $this->request->getPost('admin_amount');
+            $amount = $this->approvalAmount($request);
             $note = trim((string) $this->request->getPost('admin_note'));
             service('financialAid')->applyApprovedAmount($request, $amount, (int) session()->get('user_id'), $note);
 
@@ -103,4 +103,14 @@ class FinancialAidController extends BaseController
 
         return redirect()->to('/administrator/financial-aid')->with('success', 'Financial aid request was denied.');
     }
+
+    private function approvalAmount(array $request): float
+    {
+        $postedAmount = trim((string) $this->request->getPost('admin_amount'));
+        if ($postedAmount !== '') {
+            return (float) $postedAmount;
+        }
+
+        return (float) ($request['requested_amount'] ?? 0);
+    }
 }