fix(menu): Back audit — cheatsheet gets ↩ Back, exceptions documented (item 24)

Audited every rofi -dmenu call site in the generated nomarchy-menu +
nomarchy-vpn. The earlier "Back everywhere" pass held up: power,
power-profile, theme, clipboard, files, audio, display (both stages),
capture, tools, system and all four VPN lists already end in ↩ Back.

Fixed: the keybinds cheatsheet — Enter on any row silently closed it;
it now ends in ↩ Back returning to the root picker (its launch point),
and Enter elsewhere stays a deliberate no-op.

Documented (rofi.nix, at the convention comment + call sites): external
modi (rofi-calc, rofi-emoji, networkmanager_dmenu, rofi-pulse-select)
cannot take an injected row — Esc is their back path; free-text
prompts (web, ask) have no list to append to.

Verified: V0; V1 (built nomarchy-menu, bash -n OK; awk audit over the
generated script shows the only back-less lists are the root picker —
by design — and the free-text prompt). V3 spot-check queued.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

agent/JOURNAL.md

@@ -17,6 +17,22 @@ Template:
 
 ---
 
+## 2026-07-04 — Back audit (iteration #12, item 24)
+- **Task:** BACKLOG NOW#24 — every list menu ends in ↩ Back.
+- **Did:** audited every `rofi -dmenu` call site in the generated
+  nomarchy-menu + nomarchy-vpn. Already compliant: power, power-profile,
+  theme, clipboard, files, audio, display (both stages), capture,
+  tools, system, VPN main/import/exit-node/tailscale. Fixed: keybinds
+  cheatsheet (Enter was a silent exit) now ends in ↩ Back → root
+  picker. Documented the exceptions in rofi.nix: external modi
+  (calc/emoji/networkmanager_dmenu/rofi-pulse-select) can't take an
+  injected row (Esc = back); free-text prompts (web/ask) have no list.
+- **Verified:** V0; V1 — built nomarchy-menu, bash -n OK; awk audit
+  over the generated script: only rows lacking back are the root
+  picker (by design) and the free-text prompt. V3 spot-check queued.
+- **Pending:** V3 spot-check. NOW now holds only item 6 (docs, [big]).
+- **Next suggestion:** item 6 first slice, or NEXT#8 (viewers+mime).
+
 ## 2026-07-04 — network menu blank rows (iteration #11, item 22)
 - **Task:** BACKLOG NOW#22 — nameless entries in the network picker.
 - **Did:** read the pinned networkmanager_dmenu 2.6.2 source: with