refactor(app): unify status colours on one token family

Three systems were reporting the same states: a full and a muted status
tier in the theme, plus raw palette steps in StatusBadge and
getStatusDotColor. A PR icon was muted in the sidebar and full-strength
in the PR panel, and the Resolved badge used a theme-independent green
so it painted a dark block in light mode. The muted tier is deleted and
every status surface now reads the one token per signal.

Dots keep a band of their own. A dot is a few points of solid colour
with no shape to read and no label attached, and the running one pulses,
so at the status band's lightness it sat below the check icons and host
badge on its own row — backwards, since the dot is the row's state.
Chroma caps at 90% of gamut rather than 100% because at the edge green
reaches C=0.215 while blue manages 0.116 and the set stops reading as
one family; dark lightness caps at 0.72 because red desaturates to pink
above it.

Host badges needed a foreground variant of the identity table. That
table is tuned for a white letter on the colour as a fill; used as text
it cannot clear 4.5:1 on both themes at once, since light needs
luminance <= 0.183 and dark needs >= 0.212. The new set is generated on
the status family's exact lightness and chroma fraction, so a host name
and a CI check in the same meta row carry equal weight instead of the
brighter one winning the row.

Also: PR avatars had their own eight-hex palette and hash duplicating
identity-colors; workspace rows under a project group now indent to the
same rail as status-grouped rows; group headers are muted; and the
pulsing dot is faster and fades further.

docs/design.md

@@ -221,11 +221,15 @@ Selected state on rows in a desktop list+detail uses `surfaceSidebarHover` as th
 
 ## 13. Status pills and badges
 
-Status pills are `palette.<color>[300]` foreground on a 10%-alpha background of the same color. Success uses green, warning uses amber, danger uses red, muted uses zinc. The `<StatusBadge>` primitive (`packages/app/src/components/ui/status-badge.tsx`) is canonical.
+There is exactly one token per status signal — `statusSuccess`, `statusDanger`, `statusWarning`, `statusMerged` — and every status surface uses it: PR state icons, CI check icons and pies, diff stats, file-change icons, status pills, usage bars. A surface does not get a quieter or louder variant because of where it sits. If a dense list feels loud, that is a density or weight problem; fix the density, not the color. The tokens are generated, not hand-picked — see the rule in `packages/app/src/styles/theme.ts` and regenerate rather than nudging one value. The level is set by the densest consumer, the sidebar workspace list.
 
-Status dots — the small filled circles next to a host or agent name — are `borderRadius.full` filled with the status color (`statusSuccess`, `statusWarning`, `statusDanger`, or `foregroundMuted`). They sit in the trailing slot of a sidebar row or as a leading marker on a status pill.
+Status **dots** are the one exception, and they are a family of their own — `statusDotSuccess`, `statusDotDanger`, `statusDotWarning`, `statusDotRunning`, read only by `getStatusDotColor` (`packages/app/src/utils/status-dot-color.ts`). Same hues and the same generation rule, but their own band: pushed away from the surface rather than toward it (darker in light, lighter in dark) and at 90% of gamut chroma against the status family's 55–60%. A dot is a few points of solid color with no shape to read and no label attached, and the running one pulses, so at the status band's lightness the dots read dimmer than the metadata beside them — backwards, since the dot is the row's state. All four move together; regenerate the set, never one hue.
 
-Identity badges — the project icon and the sidebar host badge — do not use the theme palette. They draw from the fixed ten-color identity table in `packages/app/src/styles/identity-colors.ts`, whose hexes are held to one contrast band so a color identifies rather than ranks. Identity color is a fill-only contract: project icons use it as a fill with a white letter, while host badges use it on their icon and retain the normal muted text color. The table is theme-independent by design; do not fork it per theme, and do not add hexes to it without recomputing the band.
+Status pills are the status token as foreground on a 10%-alpha tint of the same token (`${token}1a`), with a 20% border (`${token}33`). The `<StatusBadge>` primitive (`packages/app/src/components/ui/status-badge.tsx`) is canonical; a pill never reaches into `palette`.
+
+Status dots — the small filled circles next to a host or agent name — are `borderRadius.full` filled with the status token. Which token a given agent state maps to is owned by `getStatusDotColor` (`packages/app/src/utils/status-dot-color.ts`); a row, a group header, and a project icon all call it rather than restating the mapping. They sit in the trailing slot of a sidebar row or as a leading marker on a status pill.
+
+Identity badges — the project icon, the sidebar host badge, and the PR-panel participant avatar — do not use the theme palette. They draw from the fixed ten-color identity table in `packages/app/src/styles/identity-colors.ts`, whose hexes are held to one contrast band so a color identifies rather than ranks. Project icons and PR avatars use it as a fill with a white letter — that is `identityColor`, one theme-independent hex per identity. Host badges use it as a _foreground_ on both the glyph and the label, which is a different contrast problem that the fill table cannot solve: no single hex clears 4.5:1 against both a near-white and a dark sidebar. Foregrounds therefore come from `identityForeground(name, colorScheme)`, one set per scheme, hue unchanged. That set is generated on the **status family's** lightness and chroma fraction, because a meta row puts a host badge beside a CI check and a diff stat, and two families at different lightness make the brighter one shout. Change the status band and this one changes with it. A host with no color assigned falls back to `foregroundMuted`. The table is theme-independent by design; do not fork it per theme, and do not add hexes to it without recomputing the band.
 
 The bespoke pills in `packages/app/src/screens/settings/host-page.tsx:97-116`, `packages/app/src/components/agent-list.tsx:607-632`, and `packages/app/src/components/sidebar-workspace-list.tsx:2889-2894` are drift to be removed. New code uses `<StatusBadge>`.