feat(web): visit 204 response, up page header/sort, trim system page

reaction_board/web/server.py

@@ -315,11 +315,15 @@ border-color:#3a2c22;color:#f3e9dc}button{background:#e9b97c;color:#2a1a10}}
         raise ApiError(HTTPStatus.METHOD_NOT_ALLOWED, "method_not_allowed", "不支持该操作")
 
     def _visit_post(self, query: Mapping[str, list[str]]) -> None:
-        """记录一次页面浏览；前端 sendBeacon 上报，写内存后定期批量落库。"""
+        """记录一次页面浏览；前端 sendBeacon 上报，写内存后定期批量落库。
+
+        埋点不需要响应内容，统一返回 ``204 No Content``，避免为加密体积和
+        前端解析负担；异常（如请求体过大）仍返回 JSON 错误。
+        """
         track = self.context.config_store.get().web.track
         collector = self.context.visits
         if not track.enabled or collector is None:
-            self._send_json(HTTPStatus.OK, {"recorded": False, "reason": "disabled"})
+            self._send_no_content()
             return
 
         path_value = _param(query, "path", "")
@@ -329,7 +333,7 @@ border-color:#3a2c22;color:#f3e9dc}button{background:#e9b97c;color:#2a1a10}}
 
         user_agent = self.headers.get("User-Agent")
         if not track.count_bots and is_bot(user_agent):
-            self._send_json(HTTPStatus.OK, {"recorded": False, "reason": "bot"})
+            self._send_no_content()
             return
 
         peer = self.client_address[0] if self.client_address else None
@@ -340,16 +344,11 @@ border-color:#3a2c22;color:#f3e9dc}button{background:#e9b97c;color:#2a1a10}}
             header_order=track.header_order,
         )
         if not ip:
-            self._send_json(HTTPStatus.OK, {"recorded": False, "reason": "no_ip"})
+            self._send_no_content()
             return
 
-        route = normalize_route(path_value)
-        recorded = collector.record(ip, route)
-        self._send_json(HTTPStatus.OK, {
-            "recorded": bool(recorded),
-            "route": route,
-            "reason": None if recorded else "capped",
-        })
+        collector.record(ip, normalize_route(path_value))
+        self._send_no_content()
 
     def _read_small_body(self) -> bytes:
         try:
@@ -570,6 +569,12 @@ border-color:#3a2c22;color:#f3e9dc}button{background:#e9b97c;color:#2a1a10}}
         if self.command != "HEAD":
             self.wfile.write(payload)
 
+    def _send_no_content(self, status: int = HTTPStatus.NO_CONTENT) -> None:
+        self.send_response(int(status))
+        self.send_header("Content-Length", "0")
+        self._security_headers()
+        self.end_headers()
+
     def _send_html(self, status: int, html: str) -> None:
         payload = html.encode("utf-8")
         self.send_response(int(status))