fix: 修复6个配置路由500错误 + 实时日志直读文件 + 开启自动同步

- 修复 config_cache/config_refresh/config_acls/config_rules/config_auth/config_peers
  6个路由缺少 save_struct() 调用导致 NameError: name 'ok' is not defined
- logs_live 改为直接读 access.log 文件，不经过 SQLite 缓存，确保实时性
- 仪表盘调整调用顺序：先同步日志再计算统计
- 设置 log_sync_interval=30 开启自动同步（原为0=关闭）

app.py

@@ -818,8 +818,10 @@ def change_password():
 @app.route("/")
 @login_required
 def dashboard():
-    stats = get_stats()
+    # Trigger auto-sync first (get_parsed_logs checks _should_auto_sync),
+    # then compute stats from the now-fresh SQLite data.
     entries = get_parsed_logs()
+    stats = get_stats()
     cfg = get_all_config()
     # P1-2: surface any active alert rules at the top of the dashboard so
     # operators see them without having to navigate to /alerts.
@@ -1060,10 +1062,14 @@ def logs_import():
 @app.route("/logs/live")
 @login_required
 def logs_live():
-    """Live tail view (auto-refresh)."""
+    """Live tail view (auto-refresh). Reads directly from file for real-time."""
     cfg = get_all_config()
     n = int(cfg.get("live_tail_lines", 100))
-    entries = get_parsed_logs(force=False)[-n:]
+    # Read directly from file - bypass SQLite cache for true real-time
+    limit = max(n * 3, 500)
+    text = read_access_log_tail(max_lines=limit)
+    entries = log_parser.parse_lines(text)
+    entries = entries[-n:]
     entries = list(reversed(entries))
     return render_template("logs_live.html", entries=entries,
                            cfg=cfg, n=n,
@@ -1264,7 +1270,7 @@ def config_acls():
                         type=types[i] if i < len(types) else "src",
                         values=vals, comment=cmnt))
             struct["acls"] = new_acls
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_acls"))
@@ -1314,7 +1320,7 @@ def config_rules():
             idx = int(request.form.get("index", "-1"))
             if 0 <= idx < len(struct["rules"]):
                 del struct["rules"][idx]
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_rules"))
@@ -1364,7 +1370,7 @@ def config_cache():
             idx = int(request.form.get("index", "-1"))
             if 0 <= idx < len(struct["cache_dirs"]):
                 del struct["cache_dirs"][idx]
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_cache"))
@@ -1415,7 +1421,7 @@ def config_refresh():
             idx = int(request.form.get("index", "-1"))
             if 0 <= idx < len(struct["refresh_patterns"]):
                 del struct["refresh_patterns"][idx]
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_refresh"))
@@ -1468,7 +1474,7 @@ def config_auth():
             idx = int(request.form.get("index", "-1"))
             if 0 <= idx < len(struct["auth_params"]):
                 del struct["auth_params"][idx]
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_auth"))
@@ -1521,7 +1527,7 @@ def config_peers():
             idx = int(request.form.get("index", "-1"))
             if 0 <= idx < len(struct["cache_peers"]):
                 del struct["cache_peers"][idx]
-        content_preview = msg if ok else ""
+        ok, msg, content_preview = save_struct(struct)
         if not ok:
             flash(msg, "error")
             return redirect(url_for("config_peers"))