Adds an 外观 page to the Harness settings sidebar for response and process
line height. On DSH 0.2.1, fonts and font sizes come from the official General
settings; the duplicate size slider and CSS overrides are disabled. Older
supported runtimes retain the original size control without migrating saved
values into official preferences. Process disclosure follows
Harness's built-in display mode; the former per-response folding option
has been removed and existing values are ignored.
Plugin-generated images and visualizations remain beside their related
response. Typography and artifact placement do not change conversation data.
The desktop context menu exposes local .html, .htm, and .xhtml file links
to both the built-in and default browser through their original file: URL.
Clicking the file or selecting 打开文件 still invokes the official file
preview. Published visualization links keep their existing HTTP URL behavior.
An unrelated visualization elsewhere in the conversation cannot replace an
ordinary file's URL. Source-less visualization metadata is used only inside a
visualization container.
Browser actions require a desktop build with local HTML support; network shares
retain their ordinary file actions.