feat(sdk-push): 小米推送点击通知时调度点击事件并传递 URL

onNotificationMessageClicked 解析 payload JSON 中的 url 字段，
通过 PushSDK.dispatchNotificationClick 传给 PushNotificationHelper，
MainActivity 收到 url 后加载到 WebView。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

sdk-push/src/main/java/com/xuqm/sdk/push/xiaomi/XuqmXiaomiPushReceiver.kt

@@ -6,6 +6,7 @@ import com.xiaomi.mipush.sdk.MiPushCommandMessage
 import com.xiaomi.mipush.sdk.MiPushMessage
 import com.xiaomi.mipush.sdk.PushMessageReceiver
 import com.xuqm.sdk.push.PushSDK
+import com.xuqm.sdk.push.model.PushNotificationClickEvent
 import com.xuqm.sdk.push.model.PushVendor
 
 class XuqmXiaomiPushReceiver : PushMessageReceiver() {
@@ -30,6 +31,27 @@ class XuqmXiaomiPushReceiver : PushMessageReceiver() {
 
     override fun onNotificationMessageClicked(context: Context, message: MiPushMessage) {
         Log.d(TAG, "Xiaomi notification clicked: ${message.title}")
+        val params = mutableMapOf<String, String>()
+        // Extract URL from payload JSON
+        val content = message.content?.takeIf { it.isNotBlank() }
+        if (content != null) {
+            runCatching {
+                val json = org.json.JSONObject(content)
+                val url = json.optString("url", "")
+                if (url.isNotBlank()) params["url"] = url
+            }
+        }
+        // Also copy extra.* fields
+        message.extra?.forEach { (k, v) -> if (v != null) params[k] = v }
+
+        val event = PushNotificationClickEvent(
+            vendor = PushVendor.XIAOMI,
+            title = message.title,
+            content = message.description ?: content,
+            params = params,
+            skipContent = null,
+        )
+        PushSDK.dispatchNotificationClick(context, event)
     }
 
     override fun onCommandResult(context: Context, message: MiPushCommandMessage) {