refactor(routes): canonical URLs now match sablog format exactly

- /show-{id}.shtml (comments page: /show-{id}-{page}.shtml)
- /category-{cid}.shtml / /category-{cid}-{page}.shtml
- /archives-{YYYYMM}.shtml / /archives-{YYYYMM}-{page}.shtml
- /tag/{name}, /tagslist.shtml, /index-{page}.shtml
- slug 时代的 /posts/{slug} 等旧格式全部 301 到 sablog 格式

app/Blog/Controllers/PostController.php

@@ -14,17 +14,22 @@ class PostController extends Controller
     {
     }
 
-    public function show(string $slug)
+    public function show(string $id, ?string $page = null)
     {
         $post = Post::query()
-            ->where('slug', $slug)
-            ->orWhere('id', (int) $slug)
+            ->where('id', (int) $id)
+            ->orWhere('slug', $id)
             ->first();
 
         abort_unless($post && $post->status === 'published', 404);
 
         $this->ensureReadable($post);
 
+        // sablog 式 /show-{id}-{page}.shtml 的评论分页
+        if ($page !== null) {
+            \Illuminate\Pagination\Paginator::currentPageResolver(fn () => max(1, (int) $page));
+        }
+
         // 浏览量由 /track-view 端点统计（页面整页缓存下控制器不执行，避免双计）
 
         $comments = $post->comments()