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/Support/SlugGenerator.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace App\Support;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Str;
+
+class SlugGenerator
+{
+    /**
+     * 生成唯一 slug。中文标题自动回退为 $fallback 或 crc32 形式。
+     */
+    public static function make(string $string, string $table, string $column = 'slug', ?int $ignoreId = null, ?string $fallback = null): string
+    {
+        $slug = Str::slug($string, '-', 'en');
+        if ($slug === '' || $slug === null) {
+            $slug = $fallback ?? $table.'-'.crc32($string);
+        }
+
+        $base = $slug;
+        $i = 2;
+
+        while (DB::table($table)->where($column, $slug)->where('id', '!=', $ignoreId ?? 0)->exists()) {
+            $slug = $base.'-'.$i++;
+        }
+
+        return $slug;
+    }
+}