the documented way to use this did not work

`import qs.horologion.modules` was the README's headline instruction and it
fails outright: Quickshell resolves `qs` against the host config root, not
the subtree, so in an empty shell the type is unavailable and in a populated
one the widget would have silently bound to the host's Config and Theme
instead of its own. The imports inside are now relative and each directory
carries a qmldir, so `import "horologion/modules"` works in any host and the
three pieces really are usable on their own.

  - refresh() dropped a request made while a run was in flight, so a
    jurisdiction or date set a moment after startup never took effect until
    midnight. It queues now.
  - The waybar script exited non-zero on its error paths, and waybar hides a
    module whose script does that -- so a missing typikon made the module
    vanish rather than say so, and the .error CSS was dead. An unrecognised
    --format field raised instead of rendering empty, and the tooltip
    interpolated unescaped text into Pango markup, which matters because
    --update-menaion fetches commemorations from a page nobody here controls.
  - The installer aborted the whole run at the point where it printed
    'leaving it alone', and a wholly successful run exited 1 because the last
    statement was a failed [ -d ] test under set -e. --help demanded typikon,
    which is what --help would have told you to install.
  - eww painted every day with the feast colour and printed a dangling
    separator, because it compares against "" and eww renders a JSON null as
    the string "null". The parenthesised ?: form two lines away was already
    right. The week list also repeated today.

pip install typikon installed nothing; there is no such package, and that was
the first line of every install path. Pascha now carries its label instead of
being a bare ISO date in a corner.

tests/smoke.sh covers the scripts, which is where all of this lived and where
nothing was covered. It caught two of these while being written.

bin/horologion-install

@@ -20,12 +20,17 @@ horologion-install [quickshell|waybar|eww|bin|all]
 USAGE
 }
 
+# Set when something was skipped, so the run can report it in its exit status
+# without `set -e` tearing the rest of the install down.
+skipped=0
+
 link() {
     local from="$1" to="$2"
     mkdir -p "$(dirname "$to")"
     if [ -e "$to" ] && [ ! -L "$to" ]; then
         echo "  ! $to exists and is not a link — leaving it alone" >&2
-        return 1
+        skipped=1
+        return 0
     fi
     ln -sfn "$from" "$to"
     echo "  $to -> $from"
@@ -74,13 +79,19 @@ do_eww() {
 NOTE
 }
 
-command -v typikon >/dev/null 2>&1 || {
+require_typikon() {
+    command -v typikon >/dev/null 2>&1 && return 0
     echo "horologion: typikon is not on PATH." >&2
-    echo "  pip install typikon" >&2
-    echo "  https://git.pumpin.online/funkpower/typikon" >&2
+    echo "  pipx install git+https://git.pumpin.online/funkpower/typikon" >&2
     exit 1
 }
 
+# --help must not be gated behind the dependency it tells you about.
+case "${1:-all}" in
+    -h|--help|help) usage; exit 0 ;;
+esac
+require_typikon
+
 case "${1:-all}" in
     quickshell) do_bin; do_quickshell ;;
     waybar)     do_bin; do_waybar ;;
@@ -88,10 +99,14 @@ case "${1:-all}" in
     bin)        do_bin ;;
     all)
         do_bin
-        [ -d "$config/quickshell" ] && do_quickshell
-        [ -d "$config/waybar" ]     && do_waybar
-        [ -d "$config/eww" ]        && do_eww
+        # `[ -d x ] && f` as the last statement of the script would make a
+        # perfectly good run exit 1 under `set -e` whenever the directory is
+        # absent. Hence the `|| true`, and the explicit exit below.
+        [ -d "$config/quickshell" ] && do_quickshell || true
+        [ -d "$config/waybar" ]     && do_waybar     || true
+        [ -d "$config/eww" ]        && do_eww        || true
         ;;
-    -h|--help|help) usage ;;
     *) usage; exit 2 ;;
 esac
+
+exit "$skipped"