docs: flip lockscreen references to hyprlock

Replace all gtklock mentions in README, ARCHITECTURE, CLAUDE.md with
hyprlock, and drop the stale gtklock consumer note from theme/colors.css
header comment (hyprlock uses Hyprlang, not CSS imports).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ARCHITECTURE.md

@@ -123,7 +123,7 @@ This system is a **Wayland-first desktop environment** built around the **Niri c
 
 ### Lock Screen
 
-#### gtklock
+#### hyprlock
 
 * Simple Wayland-native lockscreen
 
@@ -190,7 +190,7 @@ System → Waybar module → Display
 ├── starship.toml
 ├── mako/
 ├── wofi/
-└── gtklock/
+└── hyprlock/
 ```
 
 All configs are sourced from the repo via:

CLAUDE.md

@@ -76,7 +76,7 @@ dotfiles/
 │   ├── starship/
 │   ├── wofi/
 │   ├── mako/
-│   ├── gtklock/
+│   ├── hyprlock/
 │   └── ...
 ├── install.sh
 ├── packages.txt

README.md

@@ -10,7 +10,7 @@ A personal Wayland desktop configuration centered around the **Niri** tiling com
 | Shell | fish + starship |
 | Launcher | wofi |
 | Notifications | mako |
-| Lockscreen | gtklock |
+| Lockscreen | hyprlock |
 | Login/greeter | greetd + regreet |
 | Wallpaper | swww |
 | Screenshots | grim + slurp + satty |

theme/colors.css

@@ -1,5 +1,5 @@
 /* Tomorrow Night - shared color palette */
-/* @import this file from waybar, wofi, gtklock CSS */
+/* @import this file from waybar, wofi CSS */
 
 @define-color tn-bg #1d1f21;
 @define-color tn-bg-alt #282a2e;