Client UI Settings General

Settings shell, ownerless copy, and durable product-onboarding namespace. It occupies `sidebar.settings` with the trigger chrome and modal settings panel, projects the `settings.section` ledger into the navigation and the `settings.onboarding` ledger into one mounted step at a time, and registers everything on the Settings pages that belongs to no single feature — the trigger/header/close chrome content, the local configuration-file action, the General section and its `settings.general.item` slot, and the `settings` dictionaries. The slot types it renders into belong to ui-settings, the settings domain base; only the shell's own contract types live here, because they reference ui-sidebar's slot type and the base layer must depend on no `ui-*` package. Feature-owned rows (Permission, Language, Appearance), sections (Models), and conditional onboarding steps stay with their feature packages.

• 适用 Agent：DeepSeek Harness
• 适配模型：DeepSeek

@deepseek-ai/dsh-client-ui-settings-general

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