Start the Web UI (dsh --profile web) and open it in a browser.
Open Settings (bottom-left) → General → the Custom Background row (in the same area as the Appearance row).
Upload an image or paste a URL — the background applies immediately and the preview surface above updates in sync.
Tune the controls — sliders snap in steps and commit on release:

Control	Meaning
不透明度 / Opacity	`0..100%` image opacity (5% steps); lowering it fades the wallpaper toward the surface.
遮罩 / Scrim	`0..95%` readability veil over the image (5% steps); white in light mode, black in dark mode.
面板不透明度 / Panel opacity	`0..100%` surface transparency (5% steps); at `100%` the official panels stay opaque (no glass).
毛玻璃模糊 / Glass blur	`0..40px` `backdrop-filter` blur on the translucent surfaces (1px steps).
壁纸模糊 / Wallpaper blur	`0..60px` blur of the wallpaper image itself (2px steps).
填充方式 / Fit	`cover` or `contain`.
会话时间线 / Timeline	on/off switch for the conversation timeline (default on). On dsh ≥ 0.1.2-rc.1 the row is labelled 会话时间线增强 / enhancement: the official rail stays and this only improves its behaviour (smooth jumps for loaded turns); turning it off restores stock behaviour.

deepseek-harness-background

安裝