feat: 添加清除 WebView 持久存储目录的功能

android/app/src/main/kotlin/io/openim/flutter/openim/MainActivity.kt

@@ -178,6 +178,39 @@ class MainActivity : FlutterActivity() {
         } finally {
             webView.destroy()
         }
+
+        clearWebViewPersistentStorageDirectories()
+    }
+
+    private fun clearWebViewPersistentStorageDirectories() {
+        val webViewDataDir = File(applicationInfo.dataDir, "app_webview")
+        val relativePaths = listOf(
+            "Default/IndexedDB",
+            "Default/Local Storage",
+            "Default/Session Storage",
+            "Default/Service Worker",
+            "Default/Cache",
+            "Default/Code Cache",
+            "Default/blob_storage",
+            "IndexedDB",
+            "Local Storage",
+            "Session Storage",
+            "Service Worker",
+            "databases",
+        )
+
+        relativePaths.forEach { relativePath ->
+            deleteRecursivelyIfExists(File(webViewDataDir, relativePath))
+        }
+    }
+
+    private fun deleteRecursivelyIfExists(file: File) {
+        if (!file.exists()) {
+            return
+        }
+        if (!file.deleteRecursively()) {
+            Log.w(TAG, "Failed to delete WebView data path: ${file.absolutePath}")
+        }
     }
 
     override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {