[Bug] setPaneOptions does not fully override existing options when provided with a cloned pane options object

[ericschv]

Version

10.0.0-alpha8

Steps to Reproduce

1. Initialize the chart without providing a layout configuration

const chart = init("chart”);

2. Clone the original pane options before modification (this will become the default pane options)

const defaultPaneOptions = utils.clone(chart.getPaneOptions()[0]);

3. Modify a pane option field that does not exist in the clone

chart.setPaneOption({
  id: "candle_pane",
  axis: {
   reverse: true,
  },
});

4. Compare the active pane options before and after reset

console.log(chart.getPaneOptions()[0]);


chart.setPaneOptions(defaultPaneOptions);


console.log(chart.getPaneOptions()[0]);

5. Verify that the axis.reverse option still exists and is set to true for “candle_pane” instead of being removed or set to false.

Current Behavior

The setPaneOptions function will merge the input object with the existing pane options. This means you cannot rely on a cloned version of chart's pane options when resetting to a default or setting variations of a chart's pane options. This can make it more difficult to implement certain features, for example, switching between different themes of a chart. To get around this you either have to set default pane options in the init() layout field or create a global pane options object with every pane option field defined:

/* init() approach */

const chart = init("chart", {
      layout: [
        {
          type: "candle",
          options: {
            id: "candle_pane",
            axis: {
              name: "normal",
              reverse: false, // <— must include reverse in order to reset it to a default
              ...
            },
            ...
          },
        },
      ],
    });

/* object reference approach */

const defaultPaneOptions = {
      id: "candle_pane",
      axis: {
        name: "normal",
        reverse: false,
        ...
      },
      ...
} 

chart.setPaneOptions(defaultPaneOptions);

Expected Behavior

I expected to be able to reset any modifications made to the chart's pane options by creating a clone of the initial pane options and passing the clone into setPaneOptions.

const chart = init("chart”);

const defaultPaneOptions= utils.clone(
   chart.getPaneOptions().find(
      (option) => option.id === "candle_pane"
   )
);

chart.setPaneOption({
   id: "candle_pane",
   axis: {
      reverse: true,
   },
});

chart.setPaneOption(defaultPaneOptions);

Environment

- OS: Sequoia v15.6.1 (Mac)
- Browser: Brave 1.81.135 (arm64) (Chromium: 139.0.7258.127)
- Framework: Next.js 15.4.5

Any additional comments?

No response