feat(ui/browser):添加确认按钮

app/src/main/java/io/legado/app/ui/browser/WebViewActivity.kt

@@ -66,6 +66,12 @@ class WebViewActivity : VMBaseActivity<ActivityWebViewBinding, WebViewModel>() {
         when (item.itemId) {
             R.id.menu_open_in_browser -> openUrl(viewModel.baseUrl)
             R.id.menu_copy_url -> sendToClip(viewModel.baseUrl)
+            R.id.menu_ok -> {
+                if (viewModel.sourceVerificationEnable) {
+                    binding.titleBar.snackbar(R.string.ok)
+                    activity?.finish()
+                }
+            }
         }
         return super.onCompatOptionsItemSelected(item)
     }

app/src/main/java/io/legado/app/ui/browser/WebViewModel.kt

@@ -87,7 +87,7 @@ class WebViewModel(application: Application) : BaseViewModel(application) {
         if (sourceVerificationEnable) {
             val key = "${sourceOrigin}_verificationResult"
             html = AnalyzeUrl(baseUrl, headerMapF = headerMap).getStrResponse(useWebView = false).body
-            CacheManager.put(key, html!!)
+            CacheManager.put(key, html ?: "")
         }
     }