feat(webview): 添加外部链接处理功能

- 引入 Context 和 Intent 导入以支持外部链接打开
- 添加 Locale 导入用于 URL 方案小写转换
- 实现 shouldLoadInWebView 函数检查 URL 方案是否允许在 WebView 中加载
- 实现 openExternalScheme 函数用于启动外部应用处理非 HTTP 链接
- 在 shouldOverrideUrlLoading 中集成新的 URL 处理逻辑
- 添加对 http、https、about、data、blob、javascript 方案的支持判断

sdk-webview/src/main/java/com/xuqm/sdk/webview/XWebViewView.kt

@@ -2,6 +2,8 @@ package com.xuqm.sdk.webview
 
 import android.Manifest
 import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.Uri
 import android.os.Handler
@@ -30,6 +32,7 @@ import androidx.compose.ui.viewinterop.AndroidView
 import androidx.core.content.ContextCompat
 import androidx.core.content.FileProvider
 import java.io.File
+import java.util.Locale
 
 // JS injected into every page to bridge dialog APIs and download interception.
 // Uses addJavascriptInterface("ReactNativeWebView") for the JS→Native channel.
@@ -107,6 +110,21 @@ true;
 internal fun buildInjectedJs(config: XWebViewConfig): String =
     DIALOG_OVERRIDE_JS + "\n" + (config.injectedJavaScript ?: "") + "\ntrue;"
 
+internal fun shouldLoadInWebView(uri: Uri): Boolean {
+    val scheme = uri.scheme?.lowercase(Locale.ROOT) ?: return true
+    return scheme in setOf("http", "https", "about", "data", "blob", "javascript")
+}
+
+internal fun openExternalScheme(context: Context, uri: Uri): Boolean {
+    return runCatching {
+        val intent = Intent(Intent.ACTION_VIEW, uri).apply {
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+        context.startActivity(intent)
+        true
+    }.getOrDefault(false)
+}
+
 // Routes window.ReactNativeWebView.postMessage() calls to [onMessage].
 // @JavascriptInterface methods are called on a background thread; we post to main.
 internal class XWebViewJsBridge(
@@ -224,7 +242,12 @@ fun XWebViewView(
                     }
 
                     override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
-                        return false
+                        val uri = request?.url ?: return false
+                        if (shouldLoadInWebView(uri)) {
+                            return false
+                        }
+                        openExternalScheme(ctx, uri)
+                        return true
                     }
                 }