fix: content quality, image format, task monitor, calendar data source, search UI & sort

platform/backend/app/api/metrics.py

@@ -321,6 +321,27 @@ def _extract_zhihu_post_id(url: str) -> str:
     raise ValueError("无法从URL中提取知乎文章/回答ID")
 
 
+def _fetch_zhihu_page(post_id: str) -> dict:
+    """多种方式尝试获取知乎文章数据，返回原始 JSON"""
+    UA = _ZHIHU_UA
+    # 方式1：专栏 API
+    urls = [
+        f"https://zhuanlan.zhihu.com/api/posts/{post_id}",
+        f"https://www.zhihu.com/api/v4/posts/{post_id}",
+        f"https://www.zhihu.com/api/v4/answers/{post_id}",
+    ]
+    exceptions = []
+    for url in urls:
+        try:
+            resp = http_requests.get(url, headers={"User-Agent": UA}, timeout=10)
+            if resp.status_code == 200:
+                return resp.json()
+            exceptions.append(f"{url} → {resp.status_code}")
+        except Exception as e:
+            exceptions.append(f"{url} → {e}")
+    raise RuntimeError(f"知乎API已封禁，无法获取数据（{'; '.join(exceptions)}）")
+
+
 class ZhihuFetchRequest(BaseModel):
     topic_id: str
     zhihu_url: str
@@ -338,17 +359,9 @@ def fetch_zhihu_metrics(
         raise HTTPException(status_code=404, detail="选题不存在")
 
     post_id = _extract_zhihu_post_id(data.zhihu_url)
-    api_url = f"https://zhuanlan.zhihu.com/api/posts/{post_id}"
 
     try:
-        resp = http_requests.get(api_url, headers={"User-Agent": _ZHIHU_UA}, timeout=15)
-        if resp.status_code == 404:
-            api_url = f"https://www.zhihu.com/api/v4/answers/{post_id}"
-            resp = http_requests.get(api_url, headers={"User-Agent": _ZHIHU_UA}, timeout=15)
-        if resp.status_code != 200:
-            raise HTTPException(status_code=502, detail=f"知乎API返回 {resp.status_code}")
-
-        raw = resp.json()
+        raw = _fetch_zhihu_page(post_id)
         platform = "zhihu"
 
         existing = db.query(ContentMetrics).filter(