fix: load DeepSeek config from browser runtime

src/compat/browser_tool_adapter.rs

@@ -80,7 +80,8 @@ impl<T: Transport + 'static> Tool for ZeroClawBrowserTool<T> {
         Ok(ToolResult {
             success: result.success,
             output,
-            error: (!result.success).then(|| "browser action returned success=false".to_string()),
+            error: (!result.success)
+                .then(|| format_browser_action_error(&result.data)),
         })
     }
 }
@@ -145,6 +146,21 @@ fn failed_tool_result(error: String) -> ToolResult {
     }
 }
 
+fn format_browser_action_error(data: &Value) -> String {
+    if let Some(error) = data.get("error") {
+        if let Some(message) = error.get("message").and_then(Value::as_str) {
+            return message.to_string();
+        }
+        return format!("browser action failed: {error}");
+    }
+
+    if data.is_null() {
+        return "browser action returned success=false".to_string();
+    }
+
+    format!("browser action failed: {data}")
+}
+
 #[derive(Debug, thiserror::Error)]
 enum BrowserActionAdapterError {
     #[error("unsupported action: {0}")]