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>

resources/views/components/dropdown.blade.php

@@ -1,4 +1,4 @@
-@props(['align' => 'right', 'width' => '48', 'contentClasses' => 'py-1 bg-white'])
+@props(['align' => 'right', 'width' => '48', 'contentClasses' => 'py-1 bg-white dark:bg-gray-700'])
 
 @php
 switch ($align) {