feat(01-02): create MemberNoteController and routes

- MemberNoteController with index() and store() methods
- StoreNoteRequest with Traditional Chinese validation messages
- Routes registered at admin.members.notes.index/store
- JSON responses for AJAX consumption in Phase 2
- DB::transaction wrapper with AuditLogger::log

routes/web.php

@@ -27,6 +27,7 @@ use App\Http\Controllers\Admin\ArticleController;
 use App\Http\Controllers\Admin\ArticleCategoryController;
 use App\Http\Controllers\Admin\ArticleTagController;
 use App\Http\Controllers\Admin\PageController;
+use App\Http\Controllers\Admin\MemberNoteController;
 use App\Http\Controllers\PublicBugReportController;
 use App\Http\Controllers\IncomeController;
 use Illuminate\Support\Facades\Route;
@@ -138,6 +139,10 @@ Route::middleware(['auth', 'admin'])->prefix('admin')->name('admin.')->group(fun
     Route::delete('/members/{member}/payments/{payment}', [AdminPaymentController::class, 'destroy'])->name('members.payments.destroy');
     Route::get('/members/{member}/payments/{payment}/receipt', [AdminPaymentController::class, 'receipt'])->name('members.payments.receipt');
 
+    // Member Notes (會員備忘錄)
+    Route::get('/members/{member}/notes', [MemberNoteController::class, 'index'])->name('members.notes.index');
+    Route::post('/members/{member}/notes', [MemberNoteController::class, 'store'])->name('members.notes.store');
+
     Route::get('/finance-documents', [FinanceDocumentController::class, 'index'])->name('finance.index');
     Route::get('/finance-documents/create', [FinanceDocumentController::class, 'create'])->name('finance.create');
     Route::post('/finance-documents', [FinanceDocumentController::class, 'store'])->name('finance.store');