chore(mobile): 将安卓/苹果应用标识统一为 cn.solsum.jinxunda

后续极光与厂商推送将使用该包名；旧测试版需卸载重装。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

mobile/android/app/build.gradle.kts

@@ -5,7 +5,7 @@ plugins {
 }
 
 android {
-    namespace = "cn.shengshentech.changlian"
+    namespace = "cn.solsum.jinxunda"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -16,7 +16,7 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "cn.shengshentech.changlian"
+        applicationId = "cn.solsum.jinxunda"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion