feat(menu): hyprpicker color picker — Tools › row + SUPER+CTRL+P (item 13 done)

The last niceties slice: pick a pixel's color into the clipboard.
hyprpicker joins grim/slurp in systemPackages; a new nomarchy-menu
`colorpicker` mode captures its output, wl-copies it, and toasts the
hex (Esc = silent cancel). Tools › row self-gates on hyprpicker being
present; SUPER+CTRL+P added in keybinds.nix, so the Hyprland bind and
the SUPER+? cheatsheet row come from the one source. Item 13 complete
and deleted from BACKLOG.

Verified: V0 (flake check); V1 — template-home and template-system
build; rendered nomarchy-menu passes bash -n and contains the mode +
gated row; cheatsheet has the SUPER+CTRL+P row; hyprland.conf has the
bind; the system toplevel ships sw/bin/hyprpicker. Remains: V3 — real
loupe → click → wl-paste round-trip in a session (HARDWARE-QUEUE).

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

agent/JOURNAL.md

@@ -17,6 +17,22 @@ Template:
 
 ---
 
+## 2026-07-05 — color picker (iteration #25, item 13 final slice → item done)
+- **Task:** BACKLOG NEXT#13 last slice — hyprpicker → clipboard from
+  the menu + a direct bind. Item 13 complete; deleted from BACKLOG.
+- **Did:** hyprpicker into systemPackages (next to grim/slurp); rofi.nix
+  `colorpicker` mode (hyprpicker → wl-copy → hex-in-toast, Esc = silent
+  cancel) + self-gated Tools › "Color picker" row + usage line;
+  keybinds.nix SUPER+CTRL+P row (feeds bind + cheatsheet).
+- **Verified:** V0; V1 — template-home AND template-system build;
+  rendered nomarchy-menu bash -n OK with mode + gated row; cheatsheet
+  txt has the SUPER+CTRL+P row; hyprland conf has the bind; system
+  toplevel ships sw/bin/hyprpicker. Picking needs a compositor → V3.
+- **Pending:** V3 queued (loupe → click → wl-paste round-trip).
+- **Next suggestion:** #15 (display profiles) needs a design pass
+  written into the entry first; #16 (greeter theming) is the next
+  directly codeable item — or #14's bump workflow (eval-tier gate).
+
 ## 2026-07-05 — low-battery notifications (iteration #24, item 13 slice)
 - **Task:** BACKLOG NEXT#13 second slice — the bar colors the battery
   at 25/10% but nothing *notified*.