feat(themes): summer pair JSON SoT + status CSS + recapture previews

Align summer-day/night waybar tokens with JSON roles (hierarchy split
on night; day overlay≠muted), unify bar font 13px + battery 25/10, add
VPN pill and status states (.on/.available/.recording/…). Recapture
executive-slate and neon-glass picker previews from theme-shot.

Verified: V0 contrast+wholeswap; V2 theme-shot four slugs.

agent/BACKLOG.md

@@ -101,31 +101,25 @@ _(Friendlier mkFlake theme-state errors → **#66**.)_
 
 ### Theme polish
 
-_(#52 residual ANSI → **#68**.)_
-_(Fidelity / hierarchy nits → **#67**.)_
-_(Import pipeline hierarchy → **#70**.)_
-_(audit-theme-design identity exemptions → **#69**.)_
-
-- **summer-day / summer-night pair polish** — waybar CSS vs JSON dual
-  SoT; night `subtext`=`muted`=`overlay`; day/night font + battery
-  threshold + VPN pill drift. Pick JSON as SoT (or document EF split).
-  Cost: CSS/JSON; V3.
-
-- **summer-\* CSS status module states** — missing `.on` / `.available`
-  / `.recording` polish vs boreal/generated. Cost: CSS; V3.
-
-- **theme preview recapture nicety** — executive-slate + neon-glass
-  previews are bare desktop+bar, not the floating-terminal composition
-  of the other 21; optional identity `btop.theme`s. Cost: asset/V3.
+_(#52 residual ANSI → **#68** ✓.)_
+_(Fidelity / hierarchy nits → **#67** ✓.)_
+_(Import pipeline hierarchy → **#70** ✓.)_
+_(audit-theme-design identity exemptions → **#69** ✓.)_
+_(summer-day/night pair polish + status CSS + preview recapture →
+  shipped 2026-07-10: JSON SoT, status states, theme-shot previews for
+  executive-slate + neon-glass.)_
 
 - **Identity optional taste retunes** — white / lumon / hackerman /
   matte-black / miasma hierarchy or status L-steps only (no traffic-light
   forced on identity themes). Product call per theme.
 
+- **Optional identity `btop.theme`** for identity whole-swaps still on
+  generated btop. Cost: assets; V3.
+
 ### v1.0 pointer
 
 See **VISION**. Remaining PROPOSED: charge-limit instant, Look & Feel,
-NVIDIA first-class, summer-* / preview / identity taste polish.
+NVIDIA first-class, identity taste / optional btop themes.
 
 
 ## Decisions `[human]`