feat(menu,install): #50 one-liners + record #46 V2 install pass

#50: Bluetooth menu row + handler self-gate on `command -v
blueman-manager` (no-op when bluetooth is off, like Printers); Control
Center rollback list /tmp/nomarchy-gens → mktemp; usbutils on the
nomarchy-install PATH (fingerprint lsusb probe); export
nomarchy-doctor/control-center/battery-notify as flake packages.
Verified V0 (flake check) + V1 (packages, installer, HM generation build).

Also records #46: the swap=0 + unattended-LUKS fail-closed contracts
(208b8d4) V2-verified via a headless two-variant install — fail-closed
exits before wipe with the disk blank; swap=0 installs with no @swap
subvol and boots to a themed desktop. Both items removed from NEXT.

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

agent/BACKLOG.md

@@ -52,18 +52,6 @@ bash -n + shellcheck) + a real-hardware read-only smoke on the dev box.
 cover the new rows headlessly; pin the fwupd `get-updates` exit-code
 semantics (0 = updates) in that fake. Spec: docs/HARDWARE.md §10.
 
-### 46. V2 verify: install swap=0 + unattended LUKS fail-closed (`208b8d4`)
-Pure `nix-instantiate` on disko subvols passed V0; **full install path
-not exercised**. VM agent with KVM:
-1. Unattended install with `NOMARCHY_SWAP_GB=0` + LUKS passphrase —
-   assert no `/swap` (or empty policy) and no `@swap` surprise; system
-   boots.
-2. Unattended **without** passphrase and **without** `NOMARCHY_NO_LUKS=1`
-   — must **fail** before wipe (fail-closed).
-3. Optional: `NOMARCHY_NO_LUKS=1` + swap=2 still installs. Use
-   `tools/test-install.sh` variants / env flags; journal results; delete
-   item when green (or file NOW bugs on failure).
-
 ### 14. Automated lock bumps — confirm the first real run
 Slices b+c shipped 2026-07-05 (`.gitea/workflows/bump.yml`): weekly
 schedule (Mon 05:17 UTC) + `workflow_dispatch` as the security
@@ -114,16 +102,6 @@ Next slice: on hardware, run `hyprctl clients` while each is open, read
 the real `class`, then append rules. Also revisit whether blueman/s-c-p
 actually float once seen (regex tolerance for the `.…-wrapped` form).
 
-### 50. Small code one-liners batch — V0/V1 (promoted 2026-07-09)
-- Bluetooth menu row self-gate on `command -v blueman-manager` (`rofi.nix`) —
-  no-op when `nomarchy.system.bluetooth.enable = false`, like Printers.
-- Control Center rollback list `/tmp/nomarchy-gens` → `mktemp` (predictable
-  world-writable path → multi-user race).
-- `usbutils` on `nomarchy-install` PATH so the fingerprint `lsusb` probe works
-  (sysfs is the current fallback).
-- Export overlay tools (doctor/control-center/battery-notify) as flake
-  `packages` (`nix build .#nomarchy-doctor`) — three lines in flake.nix.
-
 ## LATER
 
 - **Wallpapers artifact split** (ROADMAP § Faster switches — decided,