fix: restore explicit gtk-theme in config for greetd session (v0.7.3)

GTK4 does not reliably read /etc/xdg/gtk-4.0/settings.ini under greetd
without a settings daemon, falling back to default blue accent instead
of Colloid-Grey-Dark-Catppuccin.

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "moongreet"
-version = "0.7.2"
+version = "0.7.3"
 edition = "2024"
 description = "A greetd greeter for Wayland with GTK4 and Layer Shell"
 license = "MIT"

DECISIONS.md

@@ -1,5 +1,12 @@
 # Decisions
 
+## 2026-04-06 – Restore explicit gtk-theme in moongreet config
+
+- **Who**: ClaudeCode, Dom
+- **Why**: GTK4 under greetd does not reliably read `/etc/xdg/gtk-4.0/settings.ini` — likely requires a settings daemon that doesn't run in the greeter session. moongreet fell back to Adwaita/Colloid-default (blue accent) instead of Colloid-Grey-Dark-Catppuccin.
+- **Tradeoffs**: Reverts `094878f` ("Remove gtk-theme from app config, use system-wide GTK settings instead"). Duplicates the theme name between settings.ini and moongreet.toml, but the explicit set via `set_gtk_theme_name()` is the only reliable path in a greetd context.
+- **How**: Added `gtk-theme = "Colloid-Grey-Dark-Catppuccin"` to example config and deployed `/etc/moongreet/moongreet.toml`.
+
 ## 2026-04-02 – Replace hardcoded CSS colors with GTK theme variables
 
 - **Who**: ClaudeCode, Dom

config/moongreet.toml

@@ -4,3 +4,7 @@
 [appearance]
 # Absolute path to wallpaper image
 background = "/usr/share/backgrounds/wallpaper.jpg"
+
+# GTK theme name — must match a directory in /usr/share/themes/
+# Required because GTK4 under greetd does not reliably read settings.ini
+gtk-theme = "Colloid-Grey-Dark-Catppuccin"