- Add Claude Desktop Official to the Claude Desktop preset list.
- Treat selected official presets as official mode in the form.
- Cover the official preset with a preset-order regression test.
Remove the category-based grouping logic from ProviderPresetSelector,
letting the array position in each preset config file be the single
source of truth for display order. Move partner presets (PatewayAI,
火山Agentplan, BytePlus, DouBaoSeed) right after Shengsuanyun across
all 6 config files so they appear earlier in the UI.