feat: 前端分離+功能api化

1. 新增資產管理CRUD、googleOAuth登入
2. 更改原記帳controller

app/Http/Controllers/Api/CategoryRuleController.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Models\CategoryRule;
+use Illuminate\Http\Request;
+use Illuminate\Foundation\Auth\Access\AuthorizesRequests;
+
+class CategoryRuleController extends Controller
+{
+    use AuthorizesRequests;
+
+    /**
+     * 新增自動分類規則
+     * POST /api/category-rules
+     */
+    public function store(Request $request)
+    {
+        $validated = $request->validate([
+            'keyword'     => 'required|string|max:255',
+            'category_id' => 'required|exists:categories,id',
+        ]);
+
+        $rule = CategoryRule::create([
+            ...$validated,
+            'user_id' => $request->user()->id,
+        ]);
+
+        // 🟢 核心優化：必須預先載入 category 關聯，否則前端拿到這筆規則物件時，會無法渲染它的分類標籤
+        $rule->load('category');
+
+        return response()->json($rule, 201);
+    }
+
+    /**
+     * 刪除自動分類規則
+     * DELETE /api/category-rules/{categoryRule}
+     */
+    public function destroy(CategoryRule $categoryRule)
+    {
+        if ($categoryRule->user_id !== $request->user()->id) {
+            return response()->json(['error' => '未經授權'], 403);
+        }
+
+        $categoryRule->delete();
+
+        return response()->json(['message' => '自動分類規則刪除成功']);
+    }
+}