feat(frontend): smoother event refresh, localized crumbs, template config deep-link

- Auto-refresh ticker is now silent: skips ``eventsLoading`` so the
  loading placeholder no longer flashes, uses ``(event.id)`` key on
  the events ``{#each}`` so unchanged rows reuse their DOM nodes, and
  short-circuits the array reassignment when the visible page is
  identical to what we already rendered. No-op refreshes leave the
  list completely untouched.
- ``PageHeader`` crumbs (Routing · Notification, Operators · Bots, …)
  were hard-coded literals. Moved to a new ``crumbs`` i18n namespace
  with 9 keys; updated all 15 call sites to ``t('crumbs.*')`` so they
  switch with the language.
- Tracker form's Immich feature-discovery banner now exposes both
  ``Open Tracking Config`` and ``Open Template Config``. Added the
  ``?edit=<id>`` auto-open hook to ``/template-configs`` (mirrors the
  existing one on ``/tracking-configs``) so the new link lands users
  directly on the editor.

frontend/src/routes/targets/+page.svelte

@@ -453,7 +453,7 @@
 	title={activeType ? activeType.charAt(0).toUpperCase() + activeType.slice(1) : t('targets.title')}
 	emphasis={activeType ? t('targets.titleEmphasis') : t('targets.titleEmphasisAll')}
 	description={activeType ? t(TYPE_DESC_KEYS[activeType]) : t('targets.description')}
-	crumb="Routing · Targets"
+	crumb={t('crumbs.routingTargets')}
 	count={targets.length}
 	countLabel={t('dashboard.targetsShort')}
 	pills={headerPills}