diff --git a/plugins/sentinel/__init__.py b/plugins/sentinel/__init__.py
index 06c860d..0bf043c 100644
--- a/plugins/sentinel/__init__.py
+++ b/plugins/sentinel/__init__.py
@@ -116,6 +116,7 @@ class Plugin(PluginWebMixin):
                 "system": c.get("system", {}),
                 "platform": c.get("platform", {}),
                 "last_seen": c.get("last_seen", 0),
+                "latency_ms": c.get("latency_ms", 0),
                 "error": c.get("error", ""),
             })
         return web.json_response({"nodes": result})
@@ -195,12 +196,13 @@ class Plugin(PluginWebMixin):
             for node in nodes:
                 if not node.get("enabled", True):
                     continue
-                online, sys_info, err = await self._fetch_system(node)
+                online, sys_info, err, latency = await self._fetch_system(node)
                 _NODE_CACHE[node.get("id", "")] = {
                     "online": online,
                     "system": sys_info or {},
                     "platform": (sys_info or {}).get("platform", {}),
                     "last_seen": time.time(),
+                    "latency_ms": latency,
                     "error": err if not online else "",
                 }
             # 每次轮询都推送 SSE (确保实时性)
@@ -217,14 +219,17 @@ class Plugin(PluginWebMixin):
 
         def _sync_fetch():
             try:
+                t0 = time.time()
                 headers = {"Authorization": f"Bearer {api_key}"} if api_key else {}
                 req = urllib.request.Request(f"{url}{base}/api/system", headers=headers)
                 with urllib.request.urlopen(req, timeout=timeout) as resp:
+                    elapsed = round((time.time() - t0) * 1000)  # ms
                     if resp.status == 200:
-                        return True, _json.loads(resp.read().decode()), ""
-                    return False, None, f"HTTP {resp.status}"
+                        return True, _json.loads(resp.read().decode()), "", elapsed
+                    return False, None, f"HTTP {resp.status}", elapsed
             except Exception as e:
-                return False, None, str(e)[:120]
+                elapsed = round((time.time() - t0) * 1000)
+                return False, None, str(e)[:120], elapsed
 
         return await asyncio.get_event_loop().run_in_executor(None, _sync_fetch)
 
@@ -242,6 +247,7 @@ class Plugin(PluginWebMixin):
                 "system": c.get("system", {}),
                 "platform": c.get("platform", {}),
                 "last_seen": c.get("last_seen", 0),
+                "latency_ms": c.get("latency_ms", 0),
                 "error": c.get("error", ""),
             })
         return result
diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index a1a33e0..3c19db0 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -157,12 +157,12 @@
       window.addEventListener('resize', function(){ self._resize(); });
     }
     HiChart.prototype._resize = function() {
-      var rect = this.canvas.parentElement.getBoundingClientRect();
-      var w = Math.max(rect.width - 8, 100);
-      var h = 60;
+      // 用 canvas 自身的 CSS 渲染尺寸 → 内部分辨率 = CSS尺寸 × DPR (保持高清)
+      var box = this.canvas.getBoundingClientRect();
+      var w = box.width, h = box.height;
+      if (w <= 0 || h <= 0) { w = 280; h = 60; }  // fallback
       this.canvas.width = w * this._dpr;
       this.canvas.height = h * this._dpr;
-      // CSS controls display size via width:100%;height:60px
       this.ctx.setTransform(this._dpr, 0, 0, this._dpr, 0, 0);
       this._draw();
     };
@@ -294,6 +294,7 @@
                 (sysInfo.trim() ? '<div class="node-sys">'+esc(sysInfo)+'</div>' : '')+
                 '<div class="node-url">'+esc(n.url||'')+'</div>'+
                 (n.notes ? '<div class="node-notes">📝 '+esc(n.notes)+'</div>' : '')+
+                '<div class="node-latency" style="font-size:.7rem;color:var(--text-dim);margin-top:4px">⏱ —</div>'+
               '</div>'+
               '<div class="col-right-stack">'+
                 '<div class="mtr" id="mtr-'+id+'-cpu"><div class="mtr-data"><span class="rlabel">CPU</span> <span class="rval cpu-val">0%</span></div><canvas id="'+id+'-cpu" height="60"></canvas></div>'+
@@ -311,7 +312,10 @@
               '</div>';
           } else {
             card.innerHTML =
-              '<div class="node-name">'+(n.online?'🟢':'🔴')+' '+esc(n.name)+'</div>'+
+              '<div style="display:flex;justify-content:space-between;align-items:flex-start">'+
+                '<div class="node-name">'+(n.online?'🟢':'🔴')+' '+esc(n.name)+'</div>'+
+                '<span class="latency-val" style="font-size:.7rem;color:var(--text-dim);flex-shrink:0">⏱ —</span>'+
+              '</div>'+
               (sysInfo.trim() ? '<div class="node-sys">'+esc(sysInfo)+'</div>' : '')+
               '<div class="node-url">'+esc(n.url||'')+'</div>'+
               (n.notes ? '<div class="node-notes">📝 '+esc(n.notes)+'</div>' : '')+
@@ -342,6 +346,17 @@
           sysEl.textContent = si2;
         } else if (sysEl) { sysEl.remove(); }
 
+        // 延迟 (横版: col-left底部 / 网格: 右上角)
+        var latEl = card.querySelector('.node-latency') || card.querySelector('.latency-val');
+        if (latEl && n.latency_ms > 0) {
+          var ms = n.latency_ms;
+          latEl.textContent = '⏱ ' + (ms < 1000 ? ms + 'ms' : (ms/1000).toFixed(1)+'s');
+          latEl.style.color = ms < 100 ? 'var(--success)' : ms < 500 ? 'var(--warning,#e0af68)' : 'var(--error)';
+        } else if (latEl && n.online === false) {
+          latEl.textContent = '⏱ —';
+          latEl.style.color = 'var(--text-dim)';
+        }
+
         var body = isRow ? card.querySelector('.col-right-stack') : card.querySelector('.metrics-body');
         if (!body) return;
 
diff --git a/services/web_panel/routes/status.py b/services/web_panel/routes/status.py
index a374ea3..16fd2e5 100644
--- a/services/web_panel/routes/status.py
+++ b/services/web_panel/routes/status.py
@@ -49,14 +49,14 @@ def setup_routes(app, prefix=''):
     logger.info(f"📡 系统状态WS端点已注册: {prefix}/api/system/ws (已加认证)")
 
 def _read_version():
-    """Read version from config file (shared helper)"""
-    ver = "v0.6.0"
+    """Read version from version.json (shared helper)"""
+    ver = "v0.0.0"
     try:
-        import yaml, os
-        config_path = os.path.join(os.path.dirname(__file__), "..", "..", "..", "config", "framework", "base_config.yaml")
-        with open(config_path) as f:
-            cfg = yaml.safe_load(f)
-            ver = cfg.get("framework", {}).get("version", ver)
+        import json, os
+        vf = os.path.join(os.path.dirname(__file__), "..", "..", "..", "version.json")
+        with open(vf) as f:
+            data = json.load(f)
+            ver = data.get("framework", {}).get("version", ver)
     except:
         pass
     return ver
@@ -193,7 +193,7 @@ async def create_backup(req):
         if sm:
             try:
                 init = sm.get_service("init")
-                ver = init.get_config("base").get("framework", {}).get("version", "0.0.0")
+                ver = _read_version()
             except: pass
         name = f"SenSu_backup_{ver}_{_time.strftime('%Y%m%d_%H%M%S')}.zip"
         dest = _os.path.join(backup_dir, name)