add manual continue button for SSO login flow

android/sample-app/src/main/java/cn/learningpad/oraltrainer/sample/MainActivity.kt

@@ -582,6 +582,7 @@ class MainActivity : Activity() {
             setBackgroundColor(COLOR_BACKGROUND)
         }
 
+        // ── 顶部：取消按钮 ──
         container.addView(Button(this).apply {
             text = "取消登录"
             setOnClickListener {
@@ -592,19 +593,11 @@ class MainActivity : Activity() {
             layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 44.dp)
         })
 
+        // ── 中间：WebView ──
         ssoWebView = WebView(this).apply {
             settings.javaScriptEnabled = true
             settings.domStorageEnabled = true
             webViewClient = object : WebViewClient() {
-                override fun onPageFinished(view: WebView?, url: String?) {
-                    super.onPageFinished(view, url)
-                    if (ssoPhase == 0 && url != null && !url.contains("/login")) {
-                        // 用户已登录（离开了登录页），现在加载授权页
-                        ssoPhase = 1
-                        view?.post { view.loadUrl(authorizeUrl) }
-                    }
-                }
-
                 override fun shouldOverrideUrlLoading(view: WebView?, request: WebResourceRequest?): Boolean {
                     val url = request?.url ?: return false
                     if (ssoPhase >= 1 && url.toString().startsWith(SSO_REDIRECT_URI)) {
@@ -621,6 +614,18 @@ class MainActivity : Activity() {
         container.addView(ssoWebView, LinearLayout.LayoutParams(
             ViewGroup.LayoutParams.MATCH_PARENT, 0, 1f
         ))
+
+        // ── 底部：登录完成后手动点继续 ──
+        container.addView(Button(this).apply {
+            text = "已登录，点击继续授权"
+            background = rounded(COLOR_ACCENT, 8f)
+            setTextColor(Color.WHITE)
+            setOnClickListener {
+                ssoPhase = 1
+                ssoWebView?.loadUrl(authorizeUrl)
+            }
+            layoutParams = LinearLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, 48.dp).withMargins(8.dp, 8.dp, 8.dp, 8.dp)
+        })
         return container
     }