IAQ页面优化和环境监测时间范围变更

public/IAQ.html

@@ -368,27 +368,31 @@
             flex: 1;
             margin-top: 6px;
             min-height: 0;
-            overflow-y: auto;
+            overflow: auto;
         }
         .table-scroll {
-            overflow-x: auto;
             min-height: 100%;
         }
         table {
             width: 100%;
             min-width: 900px;
-            border-collapse: collapse;
+            border-collapse: separate;
+            border-spacing: 0;
             font-size: 12px;
         }
         thead {
             background: rgba(var(--color-primary-rgb), 0.06);
         }
         th {
+            position: sticky;
+            top: 0;
+            z-index: 2;
             padding: 10px 8px;
             text-align: center;
             font-weight: 500;
-            color: var(--color-primary-light);
+            color: var(--color-text-bright);
             font-size: 12px;
+            background: #101d12;
             border-bottom: 1px solid rgba(var(--color-primary-rgb), 0.15);
             white-space: nowrap;
         }

src/biz/device.ts

@@ -292,13 +292,22 @@ function getTodayStart(): string {
 }
 
 /**
+ * 获取最近一小时起始的时间字符串
+ */
+function getLastHourStart(): string {
+    const now = new Date();
+    now.setHours(now.getHours() - 1);
+    return formatTime(now);
+}
+
+/**
  * 获取当天最近的 device_data 记录（按设备测量时间倒序，限量返回）
  */
 async function getTodayDeviceData(deviceId: string, limit: number = RECORD_LIMIT): Promise<any[]> {
-    const todayStart = getTodayStart();
+    const hourAgo = getLastHourStart();
     const params: any = {
         device_id: deviceId,
-        device_time: { "%gte%": todayStart },
+        device_time: { "%gte%": hourAgo },
         "%orderDesc%": "device_time",
     };
     if (limit) params["%limit%"] = limit;