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, 4 insertions, 3 deletions

diff --git a/src/lib/Error/LogInRestricted.svelte b/src/lib/Error/LogInRestricted.svelte
index 999f2db3..0d4f00e3 100644
--- a/src/lib/Error/LogInRestricted.svelte
+++ b/src/lib/Error/LogInRestricted.svelte
@@ -2,18 +2,19 @@
 import Popup from "$lib/Layout/Popup.svelte";
 import { env } from "$env/dynamic/public";
 import localforage from "localforage";
+import locale from "$stores/locale";
 </script>
 
 <Popup fullscreen locked>
   <div class="message">
-    Please <a
+    {$locale().errors?.loginRequiredPrefix}<a
       href={`https://anilist.co/api/v2/oauth/authorize?client_id=${env.PUBLIC_ANILIST_CLIENT_ID}&redirect_uri=${env.PUBLIC_ANILIST_REDIRECT_URI}&response_type=code`}
       onclick={async () => {
         await localforage.setItem(
           'redirect',
           window.location.origin + window.location.pathname + window.location.search
         );
-      }}>log in</a
-    > to view this page.
+      }}>{$locale().errors?.loginRequiredLink}</a
+    >{$locale().errors?.loginRequiredSuffix}
   </div>
 </Popup>