feat: 创建数据模型

- SystemSetting: 系统设置模型,支持配置管理
- Terminal: 终端模型,支持终端管理
- TerminalKnowledgeBase: 终端知识库关联模型
- TerminalPrompt: 终端提示词模型
- TerminalSyncLog: 终端同步日志模型
- SopTemplate: SOP模板模型
- SopStep: SOP步骤模型
- SopInteractiveTask: SOP交互任务模型
- SopTemplateVersion: SOP模板版本模型

所有模型集成 LogsActivity trait 用于操作日志记录

app/Models/Terminal.php

@@ -0,0 +1,90 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\SoftDeletes;
+use Spatie\Activitylog\Traits\LogsActivity;
+use Spatie\Activitylog\LogOptions;
+
+class Terminal extends Model
+{
+    use HasFactory, SoftDeletes, LogsActivity;
+
+    /**
+     * 可批量赋值的属性
+     *
+     * @var array<string>
+     */
+    protected $fillable = [
+        'name',
+        'code',
+        'ip_address',
+        'station_id',
+        'diagram_url',
+        'display_config',
+        'is_online',
+        'last_online_at',
+    ];
+
+    /**
+     * 属性类型转换
+     *
+     * @return array<string, string>
+     */
+    protected function casts(): array
+    {
+        return [
+            'display_config' => 'array',
+            'is_online' => 'boolean',
+            'last_online_at' => 'datetime',
+        ];
+    }
+
+    /**
+     * 获取终端关联的知识库
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
+     */
+    public function knowledgeBases()
+    {
+        return $this->belongsToMany(KnowledgeBase::class, 'terminal_knowledge_bases')
+                    ->withPivot('priority')
+                    ->withTimestamps()
+                    ->orderBy('priority');
+    }
+
+    /**
+     * 获取终端的提示词配置
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasOne
+     */
+    public function prompt()
+    {
+        return $this->hasOne(TerminalPrompt::class);
+    }
+
+    /**
+     * 获取终端的同步日志
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function syncLogs()
+    {
+        return $this->hasMany(TerminalSyncLog::class);
+    }
+
+    /**
+     * 配置活动日志选项
+     *
+     * @return \Spatie\Activitylog\LogOptions
+     */
+    public function getActivitylogOptions(): LogOptions
+    {
+        return LogOptions::defaults()
+            ->logOnly(['name', 'code', 'station_id', 'diagram_url', 'display_config'])
+            ->logOnlyDirty()
+            ->setDescriptionForEvent(fn(string $eventName) => "终端已{$eventName}");
+    }
+}