feat(post): 新增手机图片排版与AI智能排版功能

- 新增手机图片排版功能，支持小红书/抖音尺寸输出
- 新增AI智能排版顾问，支持内容分析与优化推荐
- 新增AI供应商管理，支持多渠道配置与同步
- 新增文章输出管理页面，支持图片预览与批量下载
- 新增字体文件与排版样式配置

app/model/PostOutput.php

@@ -0,0 +1,62 @@
+<?php
+
+declare(strict_types=1);
+
+namespace app\model;
+
+use app\common\model\Base;
+use think\model\concern\SoftDelete;
+
+class PostOutput extends Base
+{
+    use SoftDelete;
+
+    protected $defaultSoftDelete = 0;
+
+    protected $name = 'post_output';
+
+    protected $json = ['config'];
+
+    public const STATUS_PROCESSING = 0;
+    public const STATUS_COMPLETED = 1;
+    public const STATUS_FAILED = 2;
+
+    public static $statusList = [
+        0 => '生成中',
+        1 => '已完成',
+        2 => '失败',
+    ];
+
+    public static $autoClearCache = [];
+
+    public function post()
+    {
+        return $this->belongsTo(Post::class, 'post_id');
+    }
+
+    public function files()
+    {
+        return $this->hasMany(PostOutputFile::class, 'output_id');
+    }
+
+    public function getStatusTextAttr()
+    {
+        return self::$statusList[$this->getData('status')] ?? '未知';
+    }
+
+    public function getOutputTypeTextAttr()
+    {
+        $types = config('output_type');
+        $type = $this->getData('output_type');
+
+        return $types[$type]['name'] ?? $type;
+    }
+
+    public static function getByPostAndType(int $postId, string $type)
+    {
+        return static::where('post_id', $postId)
+            ->where('output_type', $type)
+            ->order('id', 'desc')
+            ->select();
+    }
+}