niri: per-host default column width, default 0.5, ultrawide gets 1/3

hosts/adventurer.toml

@@ -29,3 +29,7 @@ background_path = "~/.local/share/backgrounds/adventurer/t.jpg"
 match = "Pioneer Electronic Corporation AV Receiver Unknown"
 mode = "3840x2160@60Hz"
 scale = 2
+
+[niri]
+# 1/3 proportion is better for the ultrawide
+default_column_width = 0.33333

install.py

@@ -145,6 +145,11 @@ class OutputConfig:
         }
 
 
+@define
+class NiriConfig:
+    default_column_width: float = 0.5
+
+
 @define
 class HostConfig:
     name: str
@@ -164,6 +169,7 @@ class HostConfig:
     use_jump_host: bool = False
     inputs: list[InputConfig] = field(factory=list)
     outputs: list[OutputConfig] = field(factory=list)
+    niri: NiriConfig = field(factory=NiriConfig)
 
     @property
     def swaylock_images(self) -> str:

templates/.config/niri/config.kdl

@@ -100,7 +100,7 @@ layout {
     // preset-window-heights { }
 
     // You can change the default width of the new windows.
-    default-column-width { proportion 0.5; }
+    default-column-width { proportion ${host.niri.default_column_width}; }
     // If you leave the brackets empty, the windows themselves will decide their initial width.
     // default-column-width {}