feat(hyprland): float+center Bluetooth + printer config dialogs

Conservative first cut of the floating-window audit (item 41): float and
center the two shipped, unambiguous config dialogs — blueman
(manager/adapters) and system-config-printer — alongside the mixer. Uses
(?i) class regexes tolerant of the XWayland `.…-wrapped` form, consistent
with the existing (?i) usage in this file.

Deliberately conservative: network is dmenu/nmtui (no GUI editor), and the
polkit prompt + GTK file portals are deferred because their window class
can't be verified headlessly — a guessed class is a dead rule. Those wait
for a hardware `hyprctl clients` read (queued).

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

modules/home/hyprland.nix

@@ -438,16 +438,26 @@ in
         background_color = rgb c.base;
       };
 
-      # Window rules. This is the config's first float rule; item 41 will
-      # broaden the set (dialogs, portals, …) once that audit lands. For
-      # now: the audio mixer opened by right-clicking the Waybar volume
-      # module (item 35) floats + centers instead of tiling. Matches
-      # pwvucontrol (the template's mixer) and pavucontrol if swapped in.
-      # Normal-priority list like `bind`/`exec-once` below, so a downstream
-      # `windowrule = [...]` concatenates rather than replaces.
+      # Window rules — float + center small config/utility dialogs that
+      # tile awkwardly. Normal-priority list like `bind`/`exec-once` below,
+      # so a downstream `windowrule = [...]` concatenates rather than
+      # replaces. Class regexes use `(?i)` and tolerate the XWayland
+      # `.…-wrapped` binary-name form.
+      #
+      # Conservative set on purpose (item 41): only windows the distro
+      # actually ships, each an unambiguous dialog. Deliberately NOT
+      # floated yet — needs on-hardware class verification: the polkit auth
+      # prompt (hyprpolkitagent exposes no discoverable class) and GTK
+      # file-chooser portals. A dead rule is harmless, but guessing a class
+      # is worse than leaving it for a verified pass.
       windowrule = [
+        # Audio mixer (item 35): right-click the Waybar volume module.
         "float, class:^(com\\.saivert\\.pwvucontrol|org\\.pulseaudio\\.pavucontrol|pavucontrol)$"
         "center, class:^(com\\.saivert\\.pwvucontrol|org\\.pulseaudio\\.pavucontrol|pavucontrol)$"
+
+        # Bluetooth manager (blueman) + CUPS printer admin.
+        "float, class:(?i)^(\\.?blueman-(manager|adapters)(-wrapped)?|\\.?system-config-printer(-wrapped)?)$"
+        "center, class:(?i)^(\\.?blueman-(manager|adapters)(-wrapped)?|\\.?system-config-printer(-wrapped)?)$"
       ];
 
       # Rendered from ./keybinds.nix (the cheatsheet reads the same list),