fix(keybinds): SUPER+? bind uses base keysym slash, not question

Item 32. Item 26 added SHIFT to the modmask but kept the shifted keysym
`question`, so the bind stayed dead. Hyprland 0.55 resolves a bind's
keysym with SHIFT consumed (issue #7750, behaviour since 0.43): with
Shift held, `$mod SHIFT, question` is matched against `slash` and never
fires. The base keysym is what works — same pattern as this file's own
`$mod SHIFT, 1` workspace binds. Also updates rofi.nix prettyKeys to
collapse "SHIFT + /" → "?" so the cheatsheet row still reads "SUPER + ?".

Verified: V0 `nix flake check --no-build` green; V1 HM activation built,
built hyprland.conf carries `bind=$mod SHIFT, slash, exec, nomarchy-menu
keybinds` (kb_layout=us → slash is `?`). The keypress opening the menu is
V3 — queued (HARDWARE-QUEUE, existing SUPER+? entry updated).

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

modules/home/rofi.nix

@@ -129,10 +129,10 @@ let
         key = lib.replaceStrings
           [ "question" "slash" "left" "right" "up" "down" ]
           [ "?" "/" "←" "→" "↑" "↓" ] b.key;
-        # ? already implies Shift — the bind needs SHIFT in its modmask
-        # (keybinds.nix), but showing it would read double, so collapse
-        # "SHIFT + ?" back to the documented "?".
-    in lib.replaceStrings [ "SHIFT + ?" ] [ "?" ] (prefix + key);
+        # The bind is `SHIFT + slash` (base keysym; keybinds.nix), which
+        # renders "SHIFT + /". `?` IS Shift+/, so collapse that back to the
+        # single documented glyph — the cheatsheet reads "SUPER + ?".
+    in lib.replaceStrings [ "SHIFT + /" ] [ "?" ] (prefix + key);
   cheatRows =
     map (b: padRight 22 (prettyKeys b) + b.desc) (keybinds.binds
       ++ lib.optionals (lib.hasInfix "," cfg.keyboard.layout)