The Moon icon previously navigated to ely://settings/appearance,
which is misleading for a button visually framed as a one-tap theme
control. Add cycle_theme_mode (System → Light → Dark → System) and
swap the icon between Sun and Moon to mirror the active state.
ElyShell now hosts a translucency_slider: Entity<SliderState> bound to
0..=100 step 1, defaulting to DEFAULT_TRANSLUCENCY_PCT. A subscription
on SliderEvent::Change writes the rounded value into the core via
set_translucency_pct, so dragging the thumb mutates the persisted
appearance setting in real time.
The appearance form swaps the static track-and-thumb visual for the
gpui_component Slider (160 wide) plus a live percentage readout. The
three preset chips move below the row as fast-set buttons that go
through a new set_translucency_pct_from_preset helper which writes
both core and the SliderState so the thumb tracks the chip choice.
reset_appearance now resets the slider to DEFAULT_TRANSLUCENCY_PCT
alongside resetting the core, keeping every UI source of truth in
lock-step.
Domain:
- AppearanceSettings gains translucency_pct (u8, 0..=100, default 40)
with a clamping setter and serde round-trip coverage.
- DEFAULT_TRANSLUCENCY_PCT and MAX_TRANSLUCENCY_PCT exported for the
shell.
Core:
- BrowserCore::set_translucency_pct delegates to the appearance struct;
the existing reset_appearance covers the reset path.
- Integration test covers persistence into snapshot.appearance.
Render:
- chrome::sidebar::panel_bg(snapshot) replaces the static PANEL_BG
constant, mapping the user's translucency_pct linearly into the alpha
byte 0xff..0xb3. Sidebar (expanded + compact) and main pane consume
the helper so changing the setting at runtime updates every glass
surface in lock-step.
Form:
- Translucency row in chrome::appearance_form mirrors the design's
static track + thumb visual driven by the persisted percentage, plus
three preset chips (Solid 0 / Default 40 / Glassy 75) that mutate the
setting through shell.set_translucency_pct.
Strict UX rule preserved: alpha never drops below 0xb3 so panels stay
readable without backdrop blur (which GPUI 0.2.2 doesn't expose).
The appearance route now opens with the design layout: serif "GENERAL"
overline + "Appearance" headline + intro paragraph, a four-tile
wallpaper picker (Dawn/Violet/Mint/Slate with active outline + check
glyph), a theme-mode segmented control, an accent swatch row, a
reduce-motion toggle, and a reset row. Every control mutates real state
through new shell methods (set_wallpaper_theme, set_theme_mode,
toggle_reduce_motion, reset_appearance) which delegate to the core.
The chrome lives in chrome::appearance_form so the page module is a
six-line shim. Light/Dark theme buttons currently switch the persisted
mode; rendering swaps will land when light/dark token sheets ship —
keeping the persistence so the eventual flip is one place.
ZacharyZhang-NY