niri: split configs often being edited.

- unable to split them completely into different parts: some visual effect may not functional.

.config/niri/config.window.kdl

@@ -0,0 +1,63 @@
+window-rule {
+    geometry-corner-radius 6
+    clip-to-geometry true
+}
+
+window-rule {
+    match app-id="QQ"
+    match app-id="Electron" title="yacd"  // Yet Another Clash Daemon (webui)
+    match app-id="wechat"
+    match app-id="org.telegram.desktop"
+    match app-id="nwjs"  // mainly for rpgmaker games.
+    // open-on-output "eDP-1"
+    block-out-from "screencast"
+}
+
+window-rule {
+    match app-id="com.obsproject.Studio"
+    match app-id="Electron" title="Test"   // frg2089.BiliLive.Observer
+    match app-id="Electron" title="Blivechat-Openlive"  // blivechat
+    default-column-display "tabbed"
+    open-on-output "eDP-1"
+}
+
+window-rule {
+    match title="^(图片查看器|.*记录)$" app-id="QQ"
+    match app-id="pavucontrol-qt"
+
+    default-column-width { proportion 0.6; }
+    default-window-height { proportion 0.85; }
+    open-floating true
+}
+
+window-rule {
+    match app-id="nwjs"
+
+    default-column-width { proportion 0.85; }
+    default-window-height { proportion 0.9; }
+    open-floating true
+}
+
+window-rule {
+    match app-id=r#"^org\.keepassxc\.KeePassXC$"#
+    match app-id=r#"^org\.gnome\.World\.Secrets$"#
+    match app-id=r#"^org\.kde\.ksecretd$"#
+    open-floating true
+}
+
+window-rule {
+    // match title=r#"Code - OSS$"#
+    match title=r#"Visual Studio Code$"# app-id=r#"^code"#
+    match app-id="krita"
+
+    open-maximized true
+}
+
+window-rule {
+    // match app-id=r#"firefox$"# title="^Picture-in-Picture$"
+    match app-id="steam" title="Friends List"
+    open-floating true
+    default-floating-position x=8 y=8 relative-to="bottom-right"
+    open-focused false
+    open-on-output "eDP-1"
+}