refactor(quickshell): move every color and font into a Theme singleton

The shell was running two unrelated palettes: an amber one (#FFD063 accent,
#EEEEEE text, #0F1012 panels) hardcoded as ~200 raw hex literals across the
launchers, sidebar, systray, vitals and notifications, and an orange one
(#e8722a) that only the dense bar had, tokenized as per-file properties.

This unifies on the ORANGE values under the AMBER naming scheme, and moves the
lot into widgets/theme/Theme.qml. `surface` takes the dense bar's void
(#0a0a0a) rather than the old panel background. Zero color and font literals
remain anywhere under widgets/ outside Theme.qml.

Collisions resolved, all near-duplicates that wanted to be one token:
  - #0F1012 + #0A0A0C + #0a0a0a -> surface
  - #EEEEEE + #dedede           -> text
  - #7A7B7D + #858585           -> muted
  - #292C30 + #22262C           -> raised
  - #FFD063 + #e8722a           -> accent

Two derived things rather than literals. accentSoft (the pale flash the
top/bottom bars show while a launcher is open) was a hand-picked #FFF3C0
against amber, which is simply wrong against orange; it is now
Qt.tint(accent, white 55%), a ratio checked against the original (amber tinted
55% gives #FFE9B8 vs the hand-picked #FFF3C0). And the dense bar had been
hand-encoding Qt.rgba(0.87,0.87,0.87,a) and Qt.rgba(0.91,0.45,0.16,a), which
are just text and accent at alpha -- now textAlpha(a)/accentAlpha(a), so they
track a palette change instead of silently drifting.

Fonts came along too. Digital-7 Mono is dropped for DepartureMono: it was
never packaged, relying on a manual ~/.dots/fonts/digital_7 install that does
not exist on terra, so `fc-match "Digital-7 Mono"` resolved to DejaVu Sans and
all 38 of those sites -- the launcher lists, sidebar clock, systray labels,
every vitals readout -- were silently rendering in a PROPORTIONAL fallback.
Numeric columns should visibly improve. readoutFont is an alias of displayFont
rather than a second literal so the two roles cannot drift apart.

quickshell/CLAUDE.md updated: it said "No shared theme/tokens file yet" and
told contributors to grep for the existing hex color, which would now
reintroduce exactly what this removes.

Verified: no file references Theme. without the import, none imports it
unused, and the whole shell -- launchers, sidebar, vitals, systray,
notifications, not just the harness -- hot-reloaded clean on terra.
tests/HeadlessSmoke.qml deliberately keeps its own copies; its value is having
no dependencies.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SgcWkm3t6BDQktYHQvb8Hx

dotfiles/quickshell/CLAUDE.md

@@ -33,8 +33,13 @@ Quickshell hot-reloads QML on file save when already running, so for most edits
 - `widgets/layout/` — `HorizontalStack`/`VerticalStack`: `RowLayout`/`ColumnLayout` wrappers that expose `default property alias content` for terser call sites, with a trailing filler `Item` that soaks up remaining space.
 - `assets/` — SVG icons referenced via `file://${Quickshell.shellDir}/assets/...`.
 
-**Styling**: No shared theme/tokens file yet — colors (`#FFD063` accent, `#0F1012`/`#292C30` backgrounds, `#EEEEEE` text) and metrics are hardcoded per-component. When touching visuals, grep for the existing hex color across `widgets/` to keep new elements consistent rather than introducing new values.
+**Styling**: All colors and font families come from the `Theme` singleton
+(`widgets/theme/Theme.qml`, `import qs.widgets.theme`) — there are no color or
+font literals left anywhere under `widgets/`. Add a token there rather than
+hardcoding a value; alpha variants of the two main colors go through
+`Theme.textAlpha(a)` / `Theme.accentAlpha(a)` instead of a hand-written
+`Qt.rgba(...)`. Metrics (sizes, spacing) are still per-component.
 
 **Component base pattern**: `BarWidget.qml` (`widgets/bar/modules/BarWidget.qml`) is a `WrapperMouseArea` + `WrapperRectangle` combo providing hover-triggered border highlight (`Behavior on border.color` animation) and `Layout.fillWidth`. Bar modules extend it via `default property alias content` rather than duplicating the hover/border chrome.
 
-**Fonts**: Clock/Date use the `Digital-7 Mono` font family — expected to be installed system-wide (see sibling `~/.dots/fonts/digital_7`), not bundled in this repo.
+**Fonts**: Two families, both via `Theme`. `Theme.displayFont` / `Theme.readoutFont` (an alias of it) are `DepartureMono Nerd Font`, installed by `services/desktop/desktop-apps.nix`; `Theme.microFont` is `DejaVu Sans Mono`. The shell no longer uses `Digital-7 Mono`, which was never packaged and depended on a manual `~/.dots/fonts/digital_7` install.