feat: restore sablog browse modes and clean imported HTML

Keep the public site readable after import (nbsp, highlighter, wrapping code, compact pager) and finish the admin extras already in this tree: sticky levels, preview, page cache, and live llms.txt.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Blog/Support/PageCacheMiddleware.php

@@ -45,7 +45,7 @@ class PageCacheMiddleware
                 'body' => $response->getContent(),
                 'type' => $response->headers->get('Content-Type') ?: 'text/html; charset=utf-8',
             ], $ttl);
-            self::rememberKey($key);
+            self::rememberKey($key, $request->fullUrl());
         }
 
         return $response;
@@ -53,8 +53,8 @@ class PageCacheMiddleware
 
     public static function flush(): void
     {
-        foreach ((array) Cache::get(self::TAG.'_keys', []) as $key) {
-            Cache::forget($key);
+        foreach (array_keys((array) Cache::get(self::TAG.'_keys', [])) as $key) {
+            Cache::forget((string) $key);
         }
 
         Cache::forget(self::TAG.'_keys');
@@ -88,16 +88,50 @@ class PageCacheMiddleware
         Cache::forget(self::TAG.'_misses');
     }
 
+    /**
+     * @return list<array{key: string, url: string, cached_at: string}>
+     */
+    public static function entries(): array
+    {
+        $entries = [];
+
+        foreach ((array) Cache::get(self::TAG.'_keys', []) as $key => $meta) {
+            $entries[] = [
+                'key' => (string) $key,
+                'url' => is_array($meta) ? (string) ($meta['url'] ?? $key) : (string) $key,
+                'cached_at' => is_array($meta) ? (string) ($meta['cached_at'] ?? '') : '',
+            ];
+        }
+
+        usort($entries, fn (array $left, array $right): int => strcmp($right['cached_at'], $left['cached_at']));
+
+        return $entries;
+    }
+
+    public static function forget(string $key): void
+    {
+        Cache::forget($key);
+        $keys = (array) Cache::get(self::TAG.'_keys', []);
+        unset($keys[$key]);
+        Cache::put(self::TAG.'_keys', $keys, now()->addDay());
+    }
+
     private static function increment(string $metric): void
     {
         $key = self::TAG.'_'.$metric;
         Cache::put($key, (int) Cache::get($key, 0) + 1, now()->addDay());
     }
 
-    private static function rememberKey(string $key): void
+    private static function rememberKey(string $key, ?string $url = null): void
     {
         $keys = (array) Cache::get(self::TAG.'_keys', []);
-        $keys[$key] = true;
+        $previous = $keys[$key] ?? [];
+
+        $keys[$key] = [
+            'url' => $url ?: (is_array($previous) ? (string) ($previous['url'] ?? '') : ''),
+            'cached_at' => now()->toDateTimeString(),
+        ];
+
         Cache::put(self::TAG.'_keys', $keys, now()->addDay());
     }
 
@@ -117,16 +151,24 @@ class PageCacheMiddleware
             return false;
         }
 
-        // 动态端点
+        // 动态端点、订阅和 agent 索引不进整页缓存，新文章要马上能看到
         if (str_starts_with($path, 'track-view')) {
             return false;
         }
 
+        if (in_array($path, ['rss.xml', 'rss.php', 'sitemap.xml', 'robots.txt', 'llms.txt'], true)) {
+            return false;
+        }
+
+        if (str_ends_with($path, '.md')) {
+            return false;
+        }
+
         return true;
     }
 
     private function key(Request $request): string
     {
-        return self::TAG.':'.md5($request->fullUrl());
+        return self::TAG.':'.md5($request->fullUrl().'|view:'.HomeViewMode::resolve($request));
     }
 }