diff --git a/README.md b/README.md
index accfed2..fc083bf 100644
--- a/README.md
+++ b/README.md
@@ -26,8 +26,9 @@
 ## 部署到 Cloudflare
 
 1. Fork 本仓库并打开 [Workers & Pages](https://dash.cloudflare.com/?to=/:account/workers-and-pages/create)，选择 **Import a repository** 后连接仓库。
-2. 部署命令修改为 `bun run deploy`。
-3. 在 **高级设置** 中填写下表变量后部署。
+2. 在构建设置中将 **Build command（构建命令）清空**。Cloudflare 可能自动识别为 `bun run build`，需要手动删除；如果控制台不允许留空，可填写 `true`。
+3. 将 **Deploy command（部署命令）** 修改为 `bun run deploy`。该命令会按需构建前端和 Worker、应用 D1 迁移并完成部署，无需单独执行构建命令；同时配置 `bun run build` 会导致前端重复构建。
+4. 在 **高级设置** 中填写下表变量后部署。
 
 | 变量 | 必填/可选 | 说明 |
 | --- | ---: | --- |
diff --git a/frontend/src/AppProvider.tsx b/frontend/src/AppProvider.tsx
index 0a75ad6..94bdb39 100644
--- a/frontend/src/AppProvider.tsx
+++ b/frontend/src/AppProvider.tsx
@@ -188,11 +188,12 @@ export function AppProvider({ children }: { children: ReactNode }) {
         servers: serversRef.current,
       })),
       onConnectedChange: (connected) => { liveConnectedRef.current = connected; },
-      wakeTargets: () => {
+      onOverviewConnected: () => {
         const now = Date.now() / 1000;
-        return serversRef.current
+        const serverIds = serversRef.current
           .filter((server) => server.timestamp && now - server.timestamp <= config.offline_threshold_seconds)
           .map((server) => server.id);
+        return serverIds.length ? api.wakeServers(serverIds) : Promise.resolve();
       },
     });
   }, [access, config.offline_threshold_seconds, loading, selectedId]);
@@ -211,8 +212,9 @@ export function AppProvider({ children }: { children: ReactNode }) {
       link.rel = "icon";
       document.head.append(link);
     }
-    link.href = config.favicon_url || config.logo_url || "/logo.svg";
-  }, [config.favicon_url, config.logo_url]);
+    link.removeAttribute("type");
+    link.href = config.logo_url || "/logo.svg";
+  }, [config.logo_url]);
 
   useEffect(() => {
     const media = matchMedia("(prefers-color-scheme: dark)");
diff --git a/frontend/src/admin-main.tsx b/frontend/src/admin-main.tsx
index 67338e6..5885c7a 100644
--- a/frontend/src/admin-main.tsx
+++ b/frontend/src/admin-main.tsx
@@ -50,8 +50,9 @@ function AdminApp() {
       link.rel = "icon";
       document.head.append(link);
     }
-    link.href = config?.favicon_url || config?.logo_url || "/logo.svg";
-  }, [config?.favicon_url, config?.logo_url]);
+    link.removeAttribute("type");
+    link.href = config?.logo_url || "/logo.svg";
+  }, [config?.logo_url]);
 
   if (error) return <div className={`admin-loading ${dark ? "admin-dark" : ""}`}><span>{error}</span><button className="secondary-btn" onClick={() => void loadConfig()}>重试</button></div>;
   if (!config) return <div className={`admin-loading ${dark ? "admin-dark" : ""}`}>正在加载管理面板</div>;
diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 07db199..2e3e1ce 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -41,6 +41,10 @@ export const api = {
   bootstrap: () => request<Bootstrap>("/api/bootstrap"),
   config: () => request<Config>("/api/config"),
   exchangeRates: () => request<ExchangeRates>("/api/exchange-rates"),
+  wakeServers: (serverIds: string[]) => request<void>("/api/live/wake", {
+    method: "POST",
+    body: JSON.stringify({ server_ids: serverIds }),
+  }),
   refreshExchangeRates: () => request<ExchangeRates>("/api/admin/exchange-rates/refresh", { method: "POST" }, true),
   servers: () => request<{ servers: Server[] }>("/api/servers"),
   adminServers: () => request<{ servers: AdminServer[] }>("/api/admin/servers", {}, true),
diff --git a/frontend/src/components/AdminPanel.tsx b/frontend/src/components/AdminPanel.tsx
index d452b31..a81ebd8 100644
--- a/frontend/src/components/AdminPanel.tsx
+++ b/frontend/src/components/AdminPanel.tsx
@@ -620,7 +620,7 @@ export function AdminPanel({
                     <div className="section-title"><Eye size={15} />外观与展示</div>
                     <div className="form-grid"><label><span>站点名称</span><input required value={settings.site_name} onChange={(event) => updateSettings("site_name", event.target.value)} /></label><label><span>站点描述</span><input value={settings.site_description} onChange={(event) => updateSettings("site_description", event.target.value)} /></label></div>
                     <label><span>站点公告</span><textarea rows={3} maxLength={1000} value={settings.site_announcement} onChange={(event) => updateSettings("site_announcement", event.target.value)} /></label>
-                    <div className="form-grid three"><label><span>界面语言</span><select value={settings.locale} onChange={(event) => updateSettings("locale", event.target.value as Settings["locale"])}><option value="zh-CN">简体中文</option><option value="en">English</option></select></label><label><span>站点 Logo 地址</span><input type="url" maxLength={1000} value={settings.logo_url} onChange={(event) => updateSettings("logo_url", event.target.value)} placeholder="https://example.com/logo.svg" /></label><label><span>浏览器图标地址</span><input type="url" maxLength={1000} value={settings.favicon_url} onChange={(event) => updateSettings("favicon_url", event.target.value)} placeholder="https://example.com/favicon.png" /></label></div>
+                    <div className="form-grid"><label><span>界面语言</span><select value={settings.locale} onChange={(event) => updateSettings("locale", event.target.value as Settings["locale"])}><option value="zh-CN">简体中文</option><option value="en">English</option></select></label><label><span>站点 Logo / 浏览器图标地址</span><input type="url" maxLength={1000} value={settings.logo_url} onChange={(event) => updateSettings("logo_url", event.target.value)} placeholder="https://example.com/logo.svg" /></label></div>
                     <div className="form-grid"><label><span>离线判定（秒）</span><input type="number" min="30" max="3600" value={settings.offline_threshold_seconds} onChange={(event) => updateSettings("offline_threshold_seconds", Number(event.target.value))} /></label><label><span>历史保留（天）</span><input type="number" min="1" max="30" value={settings.history_retention_days} onChange={(event) => updateSettings("history_retention_days", Number(event.target.value))} /></label></div>
                   </> : null}
 
diff --git a/frontend/src/demo.ts b/frontend/src/demo.ts
index 6e645c5..0105cfd 100644
--- a/frontend/src/demo.ts
+++ b/frontend/src/demo.ts
@@ -5,7 +5,6 @@ export const demoConfig: Config = {
   site_description: "边缘节点与核心服务运行状态",
   site_announcement: "",
   logo_url: "",
-  favicon_url: "",
   locale: "zh-CN",
   public_dashboard: true,
   offline_threshold_seconds: 180,
diff --git a/frontend/src/transport.ts b/frontend/src/transport.ts
index 75deddf..02834be 100644
--- a/frontend/src/transport.ts
+++ b/frontend/src/transport.ts
@@ -3,16 +3,13 @@ import type { Server } from "./types";
 
 const RECONNECT_DELAY = 3_000;
 const HEARTBEAT_INTERVAL = 30_000;
-const WAKE_CONCURRENCY = 6;
-const WAKE_TIMEOUT = 5_000;
-const WAKE_SETTLE = 100;
 
 export interface LiveTransportHandlers {
   onServer: (server: Server) => void;
   onBatch: (updates: BatchUpdate[], cached: boolean) => void;
   onConnectedChange: (connected: boolean) => void;
-  /** Online servers that should be woken when the overview connects. */
-  wakeTargets: () => string[];
+  /** Wakes online Agents through one batched HTTP request. */
+  onOverviewConnected: () => Promise<void>;
 }
 
 export interface LiveTransportOptions {
@@ -31,8 +28,8 @@ function endpoint(serverId: string | null): URL {
 
 /**
  * WSS-only live feed. Returns a disposer; the caller owns when the connection
- * starts and stops. Reconnects on close, and on the overview it opens a short
- * socket per online server so hibernating Durable Objects resume reporting.
+ * starts and stops. Reconnects on close, and asks the Worker to wake online
+ * Agents in one batch when the overview connection opens.
  */
 export function connectLive(
   { serverId }: LiveTransportOptions,
@@ -40,48 +37,20 @@ export function connectLive(
 ): () => void {
   const sockets: WebSocket[] = [];
   const reconnects: number[] = [];
-  const wakeTimers: number[] = [];
-  const wakeSockets = new Set<WebSocket>();
   let cancelled = false;
+  let wakeInFlight = false;
 
   const reportConnected = () => {
     handlers.onConnectedChange(sockets.some((socket) => socket.readyState === WebSocket.OPEN));
   };
 
   const wakeOverviewAgents = () => {
-    if (serverId || cancelled) return;
-    const queue = Array.from(new Set(handlers.wakeTargets()));
-    let cursor = 0;
-    let active = 0;
-    const launch = () => {
-      while (!cancelled && active < WAKE_CONCURRENCY && cursor < queue.length) {
-        const socket = new WebSocket(endpoint(queue[cursor++]));
-        wakeSockets.add(socket);
-        active += 1;
-        let finished = false;
-        let timeout = 0;
-        const finish = () => {
-          if (finished) return;
-          finished = true;
-          clearTimeout(timeout);
-          wakeSockets.delete(socket);
-          active -= 1;
-          socket.onopen = null;
-          socket.onclose = null;
-          socket.onerror = null;
-          if (socket.readyState === WebSocket.OPEN || socket.readyState === WebSocket.CONNECTING) {
-            socket.close();
-          }
-          launch();
-        };
-        timeout = window.setTimeout(finish, WAKE_TIMEOUT);
-        wakeTimers.push(timeout);
-        socket.onopen = () => wakeTimers.push(window.setTimeout(finish, WAKE_SETTLE));
-        socket.onclose = finish;
-        socket.onerror = finish;
-      }
-    };
-    launch();
+    if (serverId || cancelled || wakeInFlight) return;
+    wakeInFlight = true;
+    void Promise.resolve()
+      .then(handlers.onOverviewConnected)
+      .catch(() => { /* Best effort; the live socket remains usable. */ })
+      .finally(() => { wakeInFlight = false; });
   };
 
   const connect = () => {
@@ -126,9 +95,6 @@ export function connectLive(
     handlers.onConnectedChange(false);
     clearInterval(heartbeat);
     reconnects.forEach(clearTimeout);
-    wakeTimers.forEach(clearTimeout);
-    wakeSockets.forEach((socket) => socket.close());
-    wakeSockets.clear();
     sockets.forEach((socket) => socket.close());
     sockets.length = 0;
   };
diff --git a/frontend/src/types.ts b/frontend/src/types.ts
index 70f9c69..43439b8 100644
--- a/frontend/src/types.ts
+++ b/frontend/src/types.ts
@@ -2,8 +2,8 @@ export interface Config {
   site_name: string;
   site_description: string;
   site_announcement: string;
+  /** 站点 Logo，同时用作浏览器标签图标。空则回落到 /logo.svg。 */
   logo_url: string;
-  favicon_url: string;
   locale: "zh-CN" | "en";
   public_dashboard: boolean;
   offline_threshold_seconds: number;
diff --git a/migrations/initial_01.sql b/migrations/initial_01.sql
index 22d16de..f59e732 100644
--- a/migrations/initial_01.sql
+++ b/migrations/initial_01.sql
@@ -272,7 +272,6 @@ INSERT INTO settings(id, value, updated_at) VALUES (
       "site_description": "轻量、实时的服务器运行状态",
       "site_announcement": "",
       "logo_url": "",
-      "favicon_url": "",
       "locale": "zh-CN",
       "public_dashboard": "true",
       "history_cache_version": "0",
diff --git a/scripts/websocket-smoke.mjs b/scripts/websocket-smoke.mjs
index ab8fac4..1c3d618 100644
--- a/scripts/websocket-smoke.mjs
+++ b/scripts/websocket-smoke.mjs
@@ -188,6 +188,27 @@ try {
     throw new Error(`Invalid Agent config: ${JSON.stringify(config)}`);
   }
   if (!configOnly) {
+  const wakeHintPromise = waitForJsonMessage(
+    agent,
+    "batched overview wake hint",
+    (message) => message.type === "ack" && message.realtimeHint === true,
+  );
+  const wakeResponse = await fetch(new URL("/api/live/wake", baseUrl), {
+    method: "POST",
+    headers: {
+      Authorization: `Bearer ${adminToken}`,
+      "Content-Type": "application/json",
+    },
+    body: JSON.stringify({ server_ids: [serverId] }),
+  });
+  if (wakeResponse.status !== 204) {
+    throw new Error(`Batch wake returned HTTP ${wakeResponse.status}: ${await wakeResponse.text()}`);
+  }
+  const wakeHint = await wakeHintPromise;
+  if (wakeHint.nextWssReportAfterMs !== 5_000) {
+    throw new Error(`Invalid batch wake hint: ${JSON.stringify(wakeHint)}`);
+  }
+
   const timestamp = Math.floor(Date.now() / 1_000);
   const baseSample = {
     timestamp,
diff --git a/src/db.rs b/src/db.rs
index b8046ed..ea011bf 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -159,6 +159,11 @@ struct AgentConfigRow {
     auto_update: i64,
 }
 
+#[derive(Debug, Deserialize)]
+struct ServerIdRow {
+    id: String,
+}
+
 #[derive(Debug, Deserialize)]
 pub struct AgentLiveContext {
     pub report_interval: i64,
@@ -365,7 +370,6 @@ pub struct SettingsView {
     pub site_description: String,
     pub site_announcement: String,
     pub logo_url: String,
-    pub favicon_url: String,
     pub locale: String,
     pub public_dashboard: bool,
     pub offline_threshold_seconds: i64,
@@ -512,6 +516,27 @@ pub async fn list_servers(db: &D1Database, include_hidden: bool) -> Result<Vec<S
     db.prepare(query).all().await?.results()
 }
 
+/// Returns only requested server IDs that exist and are visible, preserving request order.
+pub async fn visible_server_ids(db: &D1Database, ids: &[String]) -> Result<Vec<String>> {
+    if ids.is_empty() {
+        return Ok(Vec::new());
+    }
+    let requested = serde_json::to_string(ids)?;
+    let rows = db
+        .prepare(
+            r#"SELECT s.id
+               FROM json_each(?1) requested
+               JOIN servers s ON s.id = CAST(requested.value AS TEXT)
+               WHERE s.hidden = 0
+               ORDER BY CAST(requested.key AS INTEGER)"#,
+        )
+        .bind(&[text(&requested)])?
+        .all()
+        .await?
+        .results::<ServerIdRow>()?;
+    Ok(rows.into_iter().map(|row| row.id).collect())
+}
+
 pub async fn get_server(
     db: &D1Database,
     id: &str,
@@ -1204,7 +1229,6 @@ pub async fn settings(
         site_description: string_setting(&values, "site_description", "轻量、实时的服务器运行状态"),
         site_announcement: string_setting(&values, "site_announcement", ""),
         logo_url: string_setting(&values, "logo_url", ""),
-        favicon_url: string_setting(&values, "favicon_url", ""),
         locale: string_setting(&values, "locale", "zh-CN"),
         public_dashboard: bool_setting(&values, "public_dashboard", true),
         offline_threshold_seconds: values
@@ -1280,9 +1304,6 @@ pub async fn update_settings(
     if let Some(value) = input.logo_url.as_deref() {
         push_setting!("logo_url", value.trim());
     }
-    if let Some(value) = input.favicon_url.as_deref() {
-        push_setting!("favicon_url", value.trim());
-    }
     if let Some(value) = input.locale.as_deref() {
         push_setting!("locale", value.trim());
     }
@@ -1658,24 +1679,22 @@ pub async fn cleanup_history(db: &D1Database, retention_days: i64) -> Result<()>
     let delete_archive = db
         .prepare("DELETE FROM metric_history_hourly WHERE timestamp < ?1")
         .bind(&[number(cutoff)])?;
-    // DDL 不和上面的语句放进同一个 batch：batch 是隐式事务，而 SQLite 不允许
-    // 在事务里 ALTER TABLE ... RENAME。压缩+删除先提交，轮换单独走；轮换中途
-    // 失败下一次 cron 重来即可，重复压缩无害（见上）。
+    // 压缩和保留期删除先原子提交；轮换随后在另一个原子 batch 中完成。
+    // 两个阶段都可独立重试，且轮换失败时不会留下缺少当前表的半完成状态。
     db.batch(vec![compact, delete_archive]).await?;
     rotate_recent_history(db).await
 }
 
 /// 丢弃上一代分钟历史，把当前代降级为上一代，再建一张空的当前代。
 async fn rotate_recent_history(db: &D1Database) -> Result<()> {
-    db.prepare("DROP TABLE IF EXISTS metric_history_old")
-        .run()
-        .await?;
-    db.prepare("ALTER TABLE metric_history RENAME TO metric_history_old")
-        .run()
-        .await?;
-    db.prepare(metric_history_ddl("metric_history"))
-        .run()
-        .await?;
+    // D1 batch guarantees transactional execution, including SQLite DDL. If any
+    // statement fails, the prior pair of recent-history tables remains intact.
+    db.batch(vec![
+        db.prepare("DROP TABLE IF EXISTS metric_history_old"),
+        db.prepare("ALTER TABLE metric_history RENAME TO metric_history_old"),
+        db.prepare(metric_history_ddl("metric_history")),
+    ])
+    .await?;
     Ok(())
 }
 
diff --git a/src/live.rs b/src/live.rs
index a7ca410..47ddebf 100644
--- a/src/live.rs
+++ b/src/live.rs
@@ -1,6 +1,7 @@
 use std::cell::RefCell;
 use std::collections::HashSet;
 
+use futures_util::{stream, StreamExt};
 use serde::{Deserialize, Serialize};
 use worker::*;
 
@@ -610,6 +611,29 @@ pub struct LiveHub {
     active_d1_flushes: RefCell<HashSet<String>>,
 }
 
+struct ActiveD1FlushGuard<'a> {
+    active: &'a RefCell<HashSet<String>>,
+    server_id: String,
+}
+
+impl<'a> ActiveD1FlushGuard<'a> {
+    fn acquire(active: &'a RefCell<HashSet<String>>, server_id: &str) -> Option<Self> {
+        if !active.borrow_mut().insert(server_id.to_string()) {
+            return None;
+        }
+        Some(Self {
+            active,
+            server_id: server_id.to_string(),
+        })
+    }
+}
+
+impl Drop for ActiveD1FlushGuard<'_> {
+    fn drop(&mut self) {
+        self.active.borrow_mut().remove(&self.server_id);
+    }
+}
+
 impl LiveHub {
     async fn broadcast_to_global_dashboard(&self, server_id: &str, payload: &str) -> bool {
         let result = async {
@@ -664,7 +688,7 @@ impl LiveHub {
                 .is_empty()
     }
 
-    fn hint_agents(&self, server_id: Option<&str>) {
+    fn hint_agents(&self, server_id: Option<&str>, force_realtime: bool) {
         let sockets = server_id.map_or_else(
             || self.state.get_websockets_with_tag("agents"),
             |server_id| {
@@ -680,7 +704,8 @@ impl LiveHub {
             let Some(agent_server_id) = attachment.server_id.as_deref() else {
                 continue;
             };
-            let realtime_active = !attachment.hidden && self.dashboard_active_for(agent_server_id);
+            let realtime_active = !attachment.hidden
+                && (force_realtime || self.dashboard_active_for(agent_server_id));
             let Ok(payload) = live_ack_payload(
                 now,
                 false,
@@ -846,6 +871,10 @@ impl DurableObject for LiveHub {
                     }
                     return Response::empty();
                 }
+                Some("hint-agents") => {
+                    self.hint_agents(None, true);
+                    return Response::empty();
+                }
                 Some("record-alert-sample") => {
                     let record = req.json::<AlertRecordRequest>().await?;
                     self.record_alert_point(&record.server_id, &record.point)
@@ -947,7 +976,7 @@ impl DurableObject for LiveHub {
         pair.server.serialize_attachment(dashboard_attachment())?;
         self.state.accept_websocket_with_tags(&pair.server, &[&tag]);
         self.replay_latest(&pair.server, server_id.as_deref());
-        self.hint_agents(server_id.as_deref());
+        self.hint_agents(server_id.as_deref(), false);
         Response::from_websocket(pair.client)
     }
 
@@ -1043,16 +1072,21 @@ impl DurableObject for LiveHub {
 
         let due_for_d1 = received_at.saturating_sub(attachment.last_d1_write_at)
             >= HISTORY_WRITE_INTERVAL_SECONDS;
-        let flush_active = self.active_d1_flushes.borrow().contains(&server_id);
-        let mut flush = if !unpersisted_reports.is_empty()
-            && (due_for_d1 || attachment.d1_flush.is_some())
-            && !flush_active
-        {
-            let database = self.env.d1("DB")?;
-            begin_d1_flush(&mut attachment).map(|snapshot| (database, snapshot))
-        } else {
-            None
-        };
+        let should_flush =
+            !unpersisted_reports.is_empty() && (due_for_d1 || attachment.d1_flush.is_some());
+        let mut flush_guard = None;
+        let mut flush = None;
+        if should_flush {
+            // Acquire before any external await below. Durable Object events may
+            // interleave while broadcasting or writing D1.
+            if let Some(guard) = ActiveD1FlushGuard::acquire(&self.active_d1_flushes, &server_id) {
+                let database = self.env.d1("DB")?;
+                flush = begin_d1_flush(&mut attachment).map(|snapshot| (database, snapshot));
+                if flush.is_some() {
+                    flush_guard = Some(guard);
+                }
+            }
+        }
         if flush.is_some() {
             if !trim_socket_attachment(&mut attachment) {
                 return ws.close(Some(1011), Some("live state exceeds attachment limit"));
@@ -1081,9 +1115,6 @@ impl DurableObject for LiveHub {
         let mut persistence_error = false;
         let mut attachment_serialized = false;
         if let Some((database, snapshot)) = flush.take() {
-            self.active_d1_flushes
-                .borrow_mut()
-                .insert(server_id.clone());
             let history_point = snapshot
                 .history
                 .point()
@@ -1110,7 +1141,6 @@ impl DurableObject for LiveHub {
                 }
                 Ok(inserted) => (true, inserted),
             };
-            self.active_d1_flushes.borrow_mut().remove(&server_id);
 
             let Some(mut current_attachment) = ws.deserialize_attachment::<SocketAttachment>()?
             else {
@@ -1134,6 +1164,7 @@ impl DurableObject for LiveHub {
             attachment = current_attachment;
             attachment_serialized = true;
             persisted = write_succeeded;
+            drop(flush_guard.take());
 
             if newly_written {
                 match crate::db::has_enabled_alert_rules(&database).await {
@@ -1314,6 +1345,36 @@ pub async fn disconnect_agents(env: &Env, server_ids: &[String]) -> Result<()> {
     Ok(())
 }
 
+pub async fn wake_agents(env: &Env, server_ids: &[String]) -> Result<()> {
+    if server_ids.is_empty() {
+        return Ok(());
+    }
+    let namespace = env.durable_object("LIVE_HUB")?;
+    let results = stream::iter(server_ids.iter())
+        .map(|server_id| {
+            let namespace = &namespace;
+            async move {
+                let stub = namespace
+                    .id_from_name(&server_hub_name(server_id))?
+                    .get_stub()?;
+                let headers = Headers::new();
+                headers.set("X-Live-Action", "hint-agents")?;
+                let mut init = RequestInit::new();
+                init.with_method(Method::Post).with_headers(headers);
+                let req = Request::new_with_init("https://live.internal/hint-agents", &init)?;
+                let response = stub.fetch_with_request(req).await?;
+                ensure_live_success(&response, "hint-agents")
+            }
+        })
+        .buffer_unordered(6)
+        .collect::<Vec<_>>()
+        .await;
+    for result in results {
+        result?;
+    }
+    Ok(())
+}
+
 pub async fn upgrade(req: Request, env: &Env) -> Result<Response> {
     let namespace = env.durable_object("LIVE_HUB")?;
     let server_id = req
@@ -1403,15 +1464,17 @@ mod tests {
         agent_wss_interval_ms, apply_live_traffic, batch_update_parts_at, begin_d1_flush,
         cached_update_value, consume_agent_message_budget, finish_d1_flush, live_ack_payload,
         next_d1_write_ms, outbound_close_code, trim_cached_live_samples, trim_socket_attachment,
-        update_alert_window, AgentMessageBudget, AlertEvaluationServer, AlertWindowSample,
-        CachedLiveSample, SocketAttachment, TrafficAttachment, ALERT_WINDOW_SECONDS,
-        BROWSER_OMITTED_REPORT_FIELDS, CACHED_LIVE_TTL_SECONDS, MAX_AGENT_BYTES_PER_WINDOW,
-        MAX_AGENT_MESSAGES_PER_WINDOW, MAX_AGENT_SAMPLES_PER_WINDOW, MAX_CACHED_LIVE_BYTES,
-        MAX_CACHED_LIVE_SAMPLES, MAX_SERIALIZED_ATTACHMENT_BYTES,
+        update_alert_window, ActiveD1FlushGuard, AgentMessageBudget, AlertEvaluationServer,
+        AlertWindowSample, CachedLiveSample, SocketAttachment, TrafficAttachment,
+        ALERT_WINDOW_SECONDS, BROWSER_OMITTED_REPORT_FIELDS, CACHED_LIVE_TTL_SECONDS,
+        MAX_AGENT_BYTES_PER_WINDOW, MAX_AGENT_MESSAGES_PER_WINDOW, MAX_AGENT_SAMPLES_PER_WINDOW,
+        MAX_CACHED_LIVE_BYTES, MAX_CACHED_LIVE_SAMPLES, MAX_SERIALIZED_ATTACHMENT_BYTES,
     };
     use crate::db::HistoryMetricAggregate;
     use crate::latency::LatencyMetricAggregates;
     use crate::models::{AgentLatencyResult, AgentReport, AlertRuleView, HistoryPoint};
+    use std::cell::RefCell;
+    use std::collections::HashSet;
 
     fn alert_point(timestamp: i64, cpu: f64, net_in: f64) -> HistoryPoint {
         HistoryPoint {
@@ -1499,6 +1562,16 @@ mod tests {
         assert_eq!(outbound_close_code(5000), None);
     }
 
+    #[test]
+    fn d1_flush_guard_is_exclusive_and_releases_on_drop() {
+        let active = RefCell::new(HashSet::new());
+        let guard = ActiveD1FlushGuard::acquire(&active, "node-a").expect("first flush lock");
+        assert!(ActiveD1FlushGuard::acquire(&active, "node-a").is_none());
+        assert!(ActiveD1FlushGuard::acquire(&active, "node-b").is_some());
+        drop(guard);
+        assert!(ActiveD1FlushGuard::acquire(&active, "node-a").is_some());
+    }
+
     #[test]
     fn bounds_agent_messages_per_connection_window() {
         let mut budget = AgentMessageBudget::default();
diff --git a/src/models.rs b/src/models.rs
index 680e689..932ddd5 100644
--- a/src/models.rs
+++ b/src/models.rs
@@ -55,7 +55,6 @@ pub struct SettingsInput {
     pub site_description: Option<String>,
     pub site_announcement: Option<String>,
     pub logo_url: Option<String>,
-    pub favicon_url: Option<String>,
     pub locale: Option<String>,
     pub public_dashboard: Option<bool>,
     pub offline_threshold_seconds: Option<i64>,
diff --git a/src/routes/admin.rs b/src/routes/admin.rs
index 4c3a114..782cd5d 100644
--- a/src/routes/admin.rs
+++ b/src/routes/admin.rs
@@ -663,6 +663,7 @@ async fn settings_patch(req: &mut Request, ctx: &RouteContext) -> Result<Respons
     {
         return error("站点公告不能超过 1000 个字符", 400);
     }
+    // logo_url 同时作为站点 Logo 和浏览器标签图标使用。
     if input
         .logo_url
         .as_deref()
@@ -789,13 +790,6 @@ async fn settings_patch(req: &mut Request, ctx: &RouteContext) -> Result<Respons
     {
         return error("界面语言仅支持简体中文或 English", 400);
     }
-    if input
-        .favicon_url
-        .as_deref()
-        .is_some_and(|value| !valid_public_asset_url(value))
-    {
-        return error("站点图标必须使用 HTTPS 地址", 400);
-    }
     let password_hash = if input
         .new_password
         .as_ref()
diff --git a/src/routes/public.rs b/src/routes/public.rs
index 1561d77..add0db4 100644
--- a/src/routes/public.rs
+++ b/src/routes/public.rs
@@ -1,5 +1,6 @@
-use std::collections::HashMap;
+use std::collections::{HashMap, HashSet};
 
+use serde::Deserialize;
 use worker::{Method, Request, Response, Result};
 
 use crate::auth::{
@@ -15,6 +16,13 @@ use crate::{
     set_admin_session_cookie, store_history_response, API_JSON_MAX_BYTES,
 };
 
+const MAX_WAKE_SERVER_IDS: usize = 500;
+
+#[derive(Deserialize)]
+struct WakeServersRequest {
+    server_ids: Vec<String>,
+}
+
 fn request_hostname(req: &Request) -> Option<String> {
     req.url()
         .ok()?
@@ -55,6 +63,9 @@ pub(crate) async fn route(mut req: Request, ctx: &RouteContext) -> Result<RouteO
         }
         return Ok(RouteOutcome::Handled(live::upgrade(req, &ctx.env).await?));
     }
+    if method == Method::Post && path == "/api/live/wake" {
+        return Ok(RouteOutcome::Handled(wake_servers(&mut req, ctx).await?));
+    }
     if method == Method::Get && path == "/api/servers" {
         return Ok(RouteOutcome::Handled(servers(ctx).await?));
     }
@@ -84,7 +95,6 @@ fn config_value(ctx: &RouteContext) -> serde_json::Value {
         "site_description": settings.site_description,
         "site_announcement": settings.site_announcement,
         "logo_url": settings.logo_url,
-        "favicon_url": settings.favicon_url,
         "locale": settings.locale,
         "public_dashboard": settings.public_dashboard,
         "offline_threshold_seconds": settings.offline_threshold_seconds,
@@ -294,6 +304,28 @@ async fn servers(ctx: &RouteContext) -> Result<Response> {
     json(&serde_json::json!({ "servers": servers }), 200)
 }
 
+async fn wake_servers(req: &mut Request, ctx: &RouteContext) -> Result<Response> {
+    if let Some(denied) = public_access_denied(ctx) {
+        return denied;
+    }
+    let input: WakeServersRequest = match request_json(req, API_JSON_MAX_BYTES).await {
+        Ok(value) => value,
+        Err(_) => return error("请求格式无效", 400),
+    };
+    if input.server_ids.len() > MAX_WAKE_SERVER_IDS
+        || input
+            .server_ids
+            .iter()
+            .any(|id| id.is_empty() || id.len() > 80 || id.contains('/'))
+        || input.server_ids.iter().collect::<HashSet<_>>().len() != input.server_ids.len()
+    {
+        return error("节点列表无效", 400);
+    }
+    let visible_ids = db::visible_server_ids(&ctx.database, &input.server_ids).await?;
+    live::wake_agents(&ctx.env, &visible_ids).await?;
+    no_content()
+}
+
 async fn history(req: &Request, ctx: &RouteContext) -> Result<Response> {
     if let Some(denied) = public_access_denied(ctx) {
         return denied;
diff --git a/wrangler.jsonc b/wrangler.jsonc
index 2e5cb37..e92100d 100644
--- a/wrangler.jsonc
+++ b/wrangler.jsonc
@@ -63,15 +63,13 @@
     "crons": ["*/5 * * * *"]
   },
   "observability": {
-    "enabled": true,
+    "enabled": false,
     "logs": {
-      "enabled": true,
-      "head_sampling_rate": 1,
-      "invocation_logs": true
+      "enabled": false,
+      "invocation_logs": false
     },
     "traces": {
-      "enabled": true,
-      "head_sampling_rate": 0.05
+      "enabled": false
     }
   },
   "dev": {