Update membership types to match charter Article 7

- Add individual, sponsor, honorary_academic types (per charter)
- Keep legacy types (regular, honorary, lifetime, student) for compatibility
- Update labels to Chinese names
- Fix MembershipPayment import to include verification dates

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/Models/Member.php

@@ -16,11 +16,14 @@ class Member extends Model
     const STATUS_EXPIRED = 'expired';
     const STATUS_SUSPENDED = 'suspended';
 
-    // Membership type constants
-    const TYPE_REGULAR = 'regular';
-    const TYPE_HONORARY = 'honorary';
-    const TYPE_LIFETIME = 'lifetime';
-    const TYPE_STUDENT = 'student';
+    // Membership type constants (per charter Article 7)
+    const TYPE_INDIVIDUAL = 'individual';       // 個人會員
+    const TYPE_SPONSOR = 'sponsor';             // 贊助會員
+    const TYPE_HONORARY_ACADEMIC = 'honorary_academic';  // 榮譽學術會員
+
+    // Legacy types for backward compatibility
+    const TYPE_REGULAR = 'individual';  // Alias for individual
+    const TYPE_HONORARY = 'honorary_academic';  // Alias for honorary_academic
 
     // Disability certificate status constants
     const DISABILITY_STATUS_PENDING = 'pending';
@@ -216,10 +219,12 @@ class Member extends Model
     public function getMembershipTypeLabelAttribute(): string
     {
         return match($this->membership_type) {
-            self::TYPE_REGULAR => '一般會員',
-            self::TYPE_HONORARY => '榮譽會員',
-            self::TYPE_LIFETIME => '終身會員',
-            self::TYPE_STUDENT => '學生會員',
+            'individual', 'regular' => '個人會員',
+            'sponsor' => '贊助會員',
+            'honorary_academic', 'honorary' => '榮譽學術會員',
+            // Legacy types
+            'lifetime' => '終身會員',
+            'student' => '學生會員',
             default => $this->membership_type,
         };
     }