feat(tools): add Brave tab and Umbriel window management helpers

dot_local/bin/executable_umbriel-launch

@@ -11,11 +11,12 @@ pattern=$1
 shift
 
 # Matches in a stable order (window id); the one after the focused match, or
-# the first when focus is elsewhere.
+# the first when focus is elsewhere. `.active` is the one window with keyboard
+# focus; `.focused` is set on every output's last-focused window.
 target=$(umbriel windows --json | jq -r --arg p "$pattern" '
     [.[] | select(.scratchpad == "" and (.app_id | test($p; "i")))] | sort_by(.id)
     | if length == 0 then empty
-      else (map(.focused) | index(true)) as $i
+      else (map(.active) | index(true)) as $i
         | if $i == null then .[0].id else .[($i + 1) % length].id end
       end')