P3 polish: asset cleanup, rail legibility, plain-words Edge slots, status desktop layout

[shiftedx]

Lands the ten deliberately-deferred P3 items from the 2026-06-11 critique (local snapshot .impeccable/critique/2026-06-11T05-34-28Z__web-src.md, 29/40), plus user-checkpoint decisions.

What landed

1. Orphaned assets — deleted web/public/dualsense/focus/ (20 HUD-era PNGs, 156KB; zero references in web/ or crates/) and the dead .dm-controller-focus CSS. Release file count 60 → 40.
2. Saved rail legibility — rows 11→12px, title 9→10px; new --ink-muted-raised token (#93939d, ≈4.94:1 on --surface-raised) applied to the rail's muted text and the discard button (the element actually on the raised surface, 4.46:1 before).
3. Edge slots speak product — the agent-missing error now reads "Onboard slots need DSCC running." (direction-neutral; mapped via friendlyEdgeSlotsError at both catch sites so the toast and inline note agree — the raw API string is in a forbidden file). Empty state teaches Fn slots.
4. Status desktop layout — user picked vertical centering (Option B of two screenshotted treatments): the band centers in the viewport at ≥1200×720 instead of hugging the top-left.
5. 🎮 emoji → brand glyph in the Status controller card, with the same mask-zoom the sidebar mark uses.
6. Color swatches beside lightbar/redline hex values in the saved rail; rows now carry a typed kind: 'color' from savedDiff.ts (no regex sniffing at render time).
7. <900px occlusion — .work-and-rail:has(.saved-mobile-bar) reserves 84px under the canvas only while the save bar is shown.
8. Toolbar readout — "TUNING SCOPE · Everyday — Global Profile · controller-only tuning" (was "PROFILE SCOPE: Global", which could contradict Status's resolution sentence; the readout tracks tuning scope, not profile resolution).
9. Legacy $: smells — stale telemetry now reads as 0 on the live trigger readouts (gated on the existing selectedGameTelemetryFresh, consistent with the telemetry chip). profileConfigDirty double-build deferred: no cheap fix without a runes migration (memoizing buildControllerConfig means hand-listing ~30 deps).
10. Toast severity — user opted in: full 1px severity border replaces the 3px side-stripe (left text inset preserved: 3+13 → 1+15).

Checkpoint

Single batched eyes-on review in dev:mock: Option B chosen for Status, all visual items approved, toast full-border opted in.

Code review notes (deliberate deferrals)

• l2/r2LivePress has a pre-existing hidden dep (legacy $: doesn't track telemetryByName read inside telemetryUnitValue()); unchanged by this PR, noted for the runes migration.
• The status-centering calc(100dvh - 130px) hardcodes measured chrome; revisit if the toolbar's height changes.
• --ink-muted-raised is a deliberate fork, not a global --ink-muted bump (a global bump would touch ~135 uses sight-unseen).
• .dm-warning / .dm-support-panel still use side-stripe borders; only the toast was in scope per the user's opt-in.
• Adjacent dead .dm-controller-focus-card CSS family left for a future dead-CSS sweep.

Gates (npm run check: typecheck, source-audit, button-map, snapshot-map, haptics-graph, build, release-size, visual-smoke at 1366/1440/390) green at every commit.

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