Add membership fee system with disability discount and fix document permissions

Features:
- Implement two fee types: entrance fee and annual fee (both NT$1,000)
- Add 50% discount for disability certificate holders
- Add disability certificate upload in member profile
- Integrate disability verification into cashier approval workflow
- Add membership fee settings in system admin

Document permissions:
- Fix hard-coded role logic in Document model
- Use permission-based authorization instead of role checks

Additional features:
- Add announcements, general ledger, and trial balance modules
- Add income management and accounting entries
- Add comprehensive test suite with factories
- Update UI translations to Traditional Chinese

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/Http/Controllers/MemberPaymentController.php

@@ -6,6 +6,7 @@ use App\Mail\PaymentSubmittedMail;
 use App\Models\Member;
 use App\Models\MembershipPayment;
 use App\Models\User;
+use App\Services\MembershipFeeCalculator;
 use App\Support\AuditLogger;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
@@ -14,6 +15,13 @@ use Illuminate\Validation\Rule;
 
 class MemberPaymentController extends Controller
 {
+    protected MembershipFeeCalculator $feeCalculator;
+
+    public function __construct(MembershipFeeCalculator $feeCalculator)
+    {
+        $this->feeCalculator = $feeCalculator;
+    }
+
     /**
      * Show payment submission form
      */
@@ -32,7 +40,10 @@ class MemberPaymentController extends Controller
                 ->with('error', __('You cannot submit payment at this time. You may already have a pending payment or your membership is already active.'));
         }
 
-        return view('member.submit-payment', compact('member'));
+        // Calculate fee details
+        $feeDetails = $this->feeCalculator->calculateNextFee($member);
+
+        return view('member.submit-payment', compact('member', 'feeDetails'));
     }
 
     /**
@@ -47,8 +58,11 @@ class MemberPaymentController extends Controller
                 ->with('error', __('You cannot submit payment at this time.'));
         }
 
+        // Calculate fee details
+        $feeDetails = $this->feeCalculator->calculateNextFee($member);
+
         $validated = $request->validate([
-            'amount' => ['required', 'numeric', 'min:0'],
+            'amount' => ['required', 'numeric', 'min:' . $feeDetails['final_amount']],
             'paid_at' => ['required', 'date', 'before_or_equal:today'],
             'payment_method' => ['required', Rule::in([
                 MembershipPayment::METHOD_BANK_TRANSFER,
@@ -65,10 +79,15 @@ class MemberPaymentController extends Controller
         $receiptFile = $request->file('receipt');
         $receiptPath = $receiptFile->store('payment-receipts', 'private');
 
-        // Create payment record
+        // Create payment record with fee details
         $payment = MembershipPayment::create([
             'member_id' => $member->id,
+            'fee_type' => $feeDetails['fee_type'],
             'amount' => $validated['amount'],
+            'base_amount' => $feeDetails['base_amount'],
+            'discount_amount' => $feeDetails['discount_amount'],
+            'final_amount' => $feeDetails['final_amount'],
+            'disability_discount' => $feeDetails['disability_discount'],
             'paid_at' => $validated['paid_at'],
             'payment_method' => $validated['payment_method'],
             'reference' => $validated['reference'] ?? null,