refactor(locale): move hardcoded UI strings into english locale

Adds optional namespaces (common, errors, commandPalette, headTitle,
notifications, schedule, events, home, reader, routes, badgePreview,
badgeWall) and extends existing ones (settings.*, lists.*, tools.*,
user.*, hololive.*) on the Locale interface. New fields are optional
so japanese.ts can omit them; svelte-i18n's fallbackLocale handles
the runtime miss.

HeadTitle gains an optional routeKey prop for type-safe lookup.
defaultActions becomes a factory so the command palette re-reads
locale on language toggle. The existing JP feedback translation
in routes/settings is preserved via japanese.ts.

Out of scope (kept hardcoded): service-worker.ts, app.html,
Landing*.svelte, tools.ts registry, Easter Event 2025 pages.

1 files changed, 5 insertions, 2 deletions

diff --git a/src/lib/List/Manga/MangaListTemplate.svelte b/src/lib/List/Manga/MangaListTemplate.svelte
index df894910..1bb53be1 100644
--- a/src/lib/List/Manga/MangaListTemplate.svelte
+++ b/src/lib/List/Manga/MangaListTemplate.svelte
@@ -18,6 +18,7 @@ import privilegedUser from "$lib/Utility/privilegedUser";
 import identity from "$stores/identity";
 import lastPruneTimes from "$stores/lastPruneTimes";
 import locale from "$stores/locale";
+import { get } from "svelte/store";
 import manga from "$stores/manga";
 import revalidateManga from "$stores/revalidateManga";
 import settings from "$stores/settings";
@@ -211,8 +212,10 @@ const cleanMedia = async (
 		if (refreshing) {
 			addNotification(
 				options({
-					heading: "Manga",
-					description: "Re-freshing manga data ...",
+					heading: get(locale)().notifications?.mangaHeading ?? "Manga",
+					description:
+						get(locale)().notifications?.mangaRefreshing ??
+						"Re-freshing manga data ...",
 				}),
 			);
 		}