feat: 完成進貨單自動拋轉應付帳款流程與AP介面優化

1. 新增 AccountPayable (應付帳款) 模組，包含 Migration、Model、Service 與 Controller
2. 修改 GoodsReceipt (進貨單) 流程，在確認進貨時自動產生對應的應付帳款單 (AP-YYYYMMDD-XX)
3. 實作應付帳款詳細頁面 (Show.tsx)，包含發票登記與標記付款功能
4. 修正應付帳款 Show 頁面的排版，將發票資訊套用標準的綠色背景區塊，並調整按鈕位置
5. 更新相關的 Service Provider 與 Routes

database/migrations/tenant/2026_02_24_134125_create_account_payables_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('account_payables', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('vendor_id')->constrained('vendors');
+            $table->string('source_document_type')->comment('來源單據類型 (e.g. goods_receipt)');
+            $table->unsignedBigInteger('source_document_id')->comment('來源單據 ID');
+            $table->string('document_number')->unique()->comment('應付帳款單號');
+            $table->decimal('total_amount', 15, 2)->comment('總金額 (含稅)');
+            $table->decimal('tax_amount', 15, 2)->default(0)->comment('稅金');
+            $table->string('status')->default('pending')->comment('狀態: pending, partially_paid, paid, cancelled');
+            $table->date('due_date')->nullable()->comment('應付日期');
+            $table->text('remarks')->nullable()->comment('備註');
+            $table->foreignId('created_by')->nullable()->constrained('users');
+            $table->timestamps();
+            
+            $table->index(['source_document_type', 'source_document_id']);
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('account_payables');
+    }
+};

database/migrations/tenant/2026_02_24_151909_modify_status_in_goods_receipts_table_enum.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('goods_receipts', function (Blueprint $table) {
+            $table->string('status', 20)->default('draft')->change();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('goods_receipts', function (Blueprint $table) {
+            $table->enum('status', ['draft', 'completed', 'cancelled'])->default('draft')->change();
+        });
+    }
+};

database/migrations/tenant/2026_02_24_162239_add_payment_and_invoice_to_account_payables_table.php

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+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('account_payables', function (Blueprint $table) {
+            $table->string('invoice_number')->nullable()->after('due_date')->comment('發票號碼');
+            $table->date('invoice_date')->nullable()->after('invoice_number')->comment('發票日期');
+            
+            $table->timestamp('paid_at')->nullable()->after('status')->comment('付款時間');
+            $table->string('payment_method')->nullable()->after('paid_at')->comment('付款方式');
+            $table->text('payment_note')->nullable()->after('payment_method')->comment('付款備註');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('account_payables', function (Blueprint $table) {
+            $table->dropColumn([
+                'invoice_number',
+                'invoice_date',
+                'paid_at',
+                'payment_method',
+                'payment_note'
+            ]);
+        });
+    }
+};