fix(waybar,menu): #51 doctor indicator glyph + CC rebuild hints + scroll

Doctor Waybar indicator now emits a non-empty glyph (󰒡) + class:bad when
unhealthy (was "text":"" → self-hidden, so the tripwire never showed);
Control Center appearance toggles (blur/gaps) print "(requires rebuild)"
matching the other CC toggles; summer-day workspace scroll e±1 → r±1 to
match every other bar.

Worktree agent; diff reviewed + cherry-picked. V0 flake check + V1
(HM generation, nomarchy-control-center build). V2 render folded into #44.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

agent/JOURNAL.md

@@ -17,6 +17,16 @@ Template:
 
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+## 2026-07-09 — #51 Waybar/menu behaviour bugs (delegated, worktree)
+- **Task:** NEXT #51. Sonnet worktree agent (parallel with #52/#54, no shared
+  files).
+- **Did:** doctor indicator `"text":""`→`"text":"󰒡"` + `class:bad` on failure
+  (`waybar.nix`); CC appearance toggles print "(requires rebuild)" like the
+  other CC toggles; summer-day scroll `e±1`→`r±1`. Reviewed diff, cherry-picked.
+- **Verified:** V0 flake check + V1 (HM gen + `nomarchy-control-center` build)
+  on main. V2 render (glyph on an unhealthy bar) folded into #44's checks.doctor.
+- **Next:** land #52/#54; batched V2.
+
 ## 2026-07-09 — Promote V2-capable PROPOSED items → NEXT #51–54 (Bernardo-directed)
 - **Task:** with the VM free (post-#46), Bernardo asked to bump the
   V2-requiring PROPOSED items too. His triage; I did the move.