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/modal.blade.php

@@ -65,7 +65,7 @@ $maxWidth = [
 
     <div
         x-show="show"
-        class="mb-6 bg-white rounded-lg overflow-hidden shadow-xl transform transition-all sm:w-full {{ $maxWidth }} sm:mx-auto"
+        class="mb-6 bg-white dark:bg-gray-800 rounded-lg overflow-hidden shadow-xl transform transition-all sm:w-full {{ $maxWidth }} sm:mx-auto"
         x-transition:enter="ease-out duration-300"
         x-transition:enter-start="opacity-0 translate-y-4 sm:translate-y-0 sm:scale-95"
         x-transition:enter-end="opacity-100 translate-y-0 sm:scale-100"