hyprland: restore mod+backslash workspace toggle

dotfiles/config/hypr/scripts/workspace-history.sh

@@ -0,0 +1,60 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+runtime_dir="${XDG_RUNTIME_DIR:-/run/user/$(id -u)}"
+sig="${HYPRLAND_INSTANCE_SIGNATURE:-}"
+if [[ -z "$sig" ]]; then
+  exit 0
+fi
+
+sock="${runtime_dir}/hypr/${sig}/.socket2.sock"
+state_dir="${runtime_dir}/hypr"
+last_file="${state_dir}/last-workspace"
+prev_file="${state_dir}/prev-workspace"
+
+mkdir -p "${state_dir}"
+
+# Initialize current workspace to avoid empty state.
+if command -v hyprctl >/dev/null 2>&1; then
+  cur_id="$(hyprctl activeworkspace -j | jq -r '.id' 2>/dev/null || true)"
+  if [[ -n "${cur_id}" && "${cur_id}" != "null" ]]; then
+    echo "${cur_id}" > "${last_file}"
+  fi
+fi
+
+# Wait for the event socket to be ready.
+while [[ ! -S "${sock}" ]]; do
+  sleep 0.2
+done
+
+nc -U "${sock}" | while read -r line; do
+  case "${line}" in
+    workspace*">>"*)
+      payload="${line#*>>}"
+      # Handle workspacev2 payloads: id,name
+      if [[ "${payload}" == *","* ]]; then
+        ws_id="${payload%%,*}"
+        ws_name="${payload#*,}"
+      else
+        ws_id="${payload}"
+        ws_name="${payload}"
+      fi
+
+      # Ignore special/negative workspaces.
+      if [[ "${ws_id}" =~ ^- ]] || [[ "${ws_name}" == special:* ]]; then
+        continue
+      fi
+
+      ws_ident="${ws_name}"
+      if [[ -z "${ws_ident}" ]]; then
+        ws_ident="${ws_id}"
+      fi
+
+      prev="$(cat "${last_file}" 2>/dev/null || true)"
+      if [[ -n "${prev}" && "${ws_ident}" != "${prev}" ]]; then
+        echo "${prev}" > "${prev_file}"
+      fi
+      echo "${ws_ident}" > "${last_file}"
+      ;;
+  esac
+done