refactor(hyprland): replace kitty-herdr with tern and adjust keybindings

- Replaced `kitty-herdr` with `tern` as the default scratchpad terminal
  across configs, scripts, and docs.
- Remapped window resize controls to `SUPER + CTRL + HJKL` and monitor
  navigation to `ALT` modifiers.
- Removed the `scrolloverview` plugin configuration and cleaned up
  obsolete menu bindings.

dot_local/bin/executable_omarchy-cycle

@@ -129,9 +129,9 @@ elif [[ $APP == "brave" ]]; then
   DEFAULT_SPAWN="brave-origin"
 
 elif [[ $APP == "terminal" ]]; then
-  # Cycle all terminals. kitty-herdr is the SUPER + A scratch terminal
-  # (omarchy-toggle-scratch owns it), so it stays out of the rotation.
-  INSTANCES=($(addresses_matching '(kitty|alacritty|ghostty|foot|wezterm)' '^kitty-herdr$'))
+  # Cycle all terminals. Tern (so.stencil.tern) is the SUPER + A scratch
+  # terminal and the pattern below already leaves it out.
+  INSTANCES=($(addresses_matching '(kitty|alacritty|ghostty|foot|wezterm)'))
   DEFAULT_LAUNCHER="omarchy-launch-terminal"
 
 elif [[ $APP == "ai" ]]; then

dot_local/bin/executable_omarchy-toggle-scratch

@@ -25,7 +25,7 @@ case ${1:-scratchpad} in
 scratchpad)
   NAME="scratchpad"
   HOME_MONITOR="Apple Computer Inc StudioDisplay 0x984262A7"
-  MEMBERS=("kitty-herdr|kitty --class=kitty-herdr --config $HOME/.config/kitty/herdr.conf")
+  MEMBERS=("so.stencil.tern|tern")
   ;;
 claude)
   NAME="claude"