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/Console/Commands/ImportMembersCommand.php

@@ -151,6 +151,9 @@ class ImportMembersCommand extends Command
                     'payment_method' => MembershipPayment::METHOD_CASH,
                     'status' => MembershipPayment::STATUS_APPROVED_CHAIR,
                     'paid_at' => now(),
+                    'cashier_verified_at' => now(),
+                    'accountant_verified_at' => now(),
+                    'chair_verified_at' => now(),
                     'notes' => 'Imported from legacy roster - pre-approved',
                 ]);