perf: 完善订单管理

packages/app/src/utils/system.ts

@@ -0,0 +1,54 @@
+/**
+ * System info utilities — replaces deprecated uni.getSystemInfoSync()
+ * with the recommended granular APIs.
+ */
+
+interface SystemLayout {
+  /** Status bar height in px */
+  readonly statusBarHeight: number
+  /** Window width in px */
+  readonly windowWidth: number
+  /** Custom nav bar height in px (status bar + title bar) */
+  readonly navBarHeight: number
+}
+
+let cached: SystemLayout | null = null
+
+/**
+ * Returns layout dimensions using the new granular APIs.
+ * Falls back to getSystemInfoSync only if the new APIs are unavailable.
+ * Results are cached since these values never change during a session.
+ */
+export function getSystemLayout(): SystemLayout {
+  if (cached) return cached
+
+  let statusBarHeight = 20
+  let windowWidth = 375
+
+  try {
+    // New recommended APIs (WeChat base lib >= 2.25.3)
+    const windowInfo = uni.getWindowInfo()
+    const deviceInfo = uni.getDeviceInfo()
+
+    statusBarHeight = windowInfo.statusBarHeight ?? 20
+    windowWidth = windowInfo.windowWidth ?? 375
+
+    // Silence unused var — deviceInfo is here for future use
+    void deviceInfo
+  } catch {
+    // Fallback for older base lib versions
+    try {
+      const sysInfo = uni.getSystemInfoSync()
+      statusBarHeight = sysInfo.statusBarHeight ?? 20
+      windowWidth = sysInfo.windowWidth ?? 375
+    } catch {
+      // Use defaults
+    }
+  }
+
+  const navTitlePx = 88 * (windowWidth / 750)
+  const navBarHeight = Math.round(statusBarHeight + navTitlePx)
+
+  cached = { statusBarHeight, windowWidth, navBarHeight }
+  return cached
+}