feat(push): 添加推送通知点击 URL 跳转支持

- 新增 PushDeepLinkHandler：通过 getLaunchIntentForPackage 启动宿主 App
  并携带 xuqm_push_url extra，供 MainActivity 读取后导航 WebView
- XuqmVivoPushReceiver.onNotificationMessageClicked 提取 params["url"]
  或 skipContent，调用 PushDeepLinkHandler.open()

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

sdk-push/src/main/java/com/xuqm/sdk/push/PushDeepLinkHandler.kt

@@ -0,0 +1,20 @@
+package com.xuqm.sdk.push
+
+import android.content.Context
+import android.content.Intent
+import android.util.Log
+
+object PushDeepLinkHandler {
+
+    const val EXTRA_PUSH_URL = "xuqm_push_url"
+    private const val TAG = "PushDeepLinkHandler"
+
+    fun open(context: Context, url: String) {
+        val pm = context.packageManager
+        val intent = pm.getLaunchIntentForPackage(context.packageName) ?: return
+        intent.flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_SINGLE_TOP
+        intent.putExtra(EXTRA_PUSH_URL, url)
+        Log.d(TAG, "Opening app with push URL: $url")
+        context.startActivity(intent)
+    }
+}

sdk-push/src/main/java/com/xuqm/sdk/push/vivo/XuqmVivoPushReceiver.kt

@@ -1,10 +1,12 @@
 package com.xuqm.sdk.push.vivo
 
 import android.content.Context
+import android.content.Intent
 import android.util.Log
 import com.vivo.push.model.UnvarnishedMessage
 import com.vivo.push.model.UPSNotificationMessage
 import com.vivo.push.sdk.OpenClientPushMessageReceiver
+import com.xuqm.sdk.push.PushDeepLinkHandler
 import com.xuqm.sdk.push.PushSDK
 import com.xuqm.sdk.push.model.PushVendor
 
@@ -25,7 +27,12 @@ class XuqmVivoPushReceiver : OpenClientPushMessageReceiver() {
     }
 
     override fun onNotificationMessageClicked(context: Context, message: UPSNotificationMessage) {
-        Log.d(TAG, "Vivo notification clicked: ${message.title}")
+        val url = message.params?.get("url")?.takeIf { it.isNotBlank() }
+            ?: message.skipContent?.takeIf { it.isNotBlank() }
+        Log.d(TAG, "Vivo notification clicked: ${message.title}, url=$url")
+        if (url != null) {
+            PushDeepLinkHandler.open(context, url)
+        }
     }
 
     companion object {