[jhery-rdo]

Linked issues

None. This is a self-contained new plugin.

Summarize your change.

Adds a layout_io Python plugin with File > Import > Layouts ... and File > Export > Layouts .... It saves the layouts shown in the layout bar to a .json file and loads them back, so a layout can be shared between users or machines.

Describe the reason for the change.

Layouts can be created, renamed and re-ordered, but there is no way to move one to another machine or share it with a colleague.

Describe what you have tested and on which operating system.

Loaded as a Python plugin into xSTUDIO 1.4.0 on Linux (Rocky 8) and exercised export and import through the File menu. Not tested on Windows or macOS.

Add a list of changes, and note any that might need special attention during the review.

• New plugin src/plugin/python_plugins/layout_io/ and one add_python_plugin(layout_io) line. There is no C++ and no new dependency.
• QML reads and writes the layouts through a second XsPanelsLayoutModel. The messages that change that model are not bound to Python, so QML has to do it. Python does the file IO and validation.
• On import, layouts are appended, never replaced. A clashing name gets a numeric suffix, panels that are not registered here are flagged in the dialog, and an xSTUDIO version mismatch is flagged without blocking.
• File paths are decoded in Python, so spaces and Windows drive letters are handled.
• Docs: a "Sharing Layouts" section in layouts.rst, CHANGELOG.md and the release notes.
• Review focus: the menu positions (3.2 in Import, 6.0 in Export) are chosen so they do not tie with existing items.

If possible, provide screenshots.

None attached yet.