M1: 数据模型 + sablog:import 脚本（MySQL 8 验证通过，不迁移 trackback 等过时功能）

app/Models/Category.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class Category extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'name',
+        'slug',
+        'display_order',
+        'post_count',
+    ];
+
+    public function posts(): HasMany
+    {
+        return $this->hasMany(Post::class);
+    }
+
+    public function getUrlAttribute(): string
+    {
+        return route('category.show', $this->slug ?? $this->id);
+    }
+}