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, 26 insertions, 9 deletions

diff --git a/src/lib/CommandPalette/syncActions.ts b/src/lib/CommandPalette/syncActions.ts
index 90c6a931..b3cf01c6 100644
--- a/src/lib/CommandPalette/syncActions.ts
+++ b/src/lib/CommandPalette/syncActions.ts
@@ -4,6 +4,7 @@ import root from "$lib/Utility/root";
 import settings from "$stores/settings";
 import settingsSyncPulled from "$stores/settingsSyncPulled";
 import settingsSyncTimes from "$stores/settingsSyncTimes";
+import locale from "$stores/locale";
 import { get } from "svelte/store";
 import type { CommandPaletteAction } from "./actions";
 
@@ -13,9 +14,11 @@ export const syncActions = (
 ): CommandPaletteAction[] => {
 	if (identityId <= 0) return [];
 
+	const l = get(locale)();
+
 	const actions: CommandPaletteAction[] = [
 		{
-			name: "Push Settings Now",
+			name: l.commandPalette?.sync?.pushNow ?? "Push Settings Now",
 			url: "#",
 			preventDefault: true,
 			tags: ["settings", "sync", "push", "upload", "remote"],
@@ -32,8 +35,10 @@ export const syncActions = (
 
 						addNotification(
 							options({
-								heading: "Settings Sync",
-								description: "Pushed local configuration to remote",
+								heading: get(locale)().settings.settingsSync.title,
+								description:
+									get(locale)().commandPalette?.sync?.pushedDescription ??
+									"Pushed local configuration to remote",
 							}),
 						);
 
@@ -46,7 +51,7 @@ export const syncActions = (
 			},
 		},
 		{
-			name: "Pull Settings Now",
+			name: l.commandPalette?.sync?.pullNow ?? "Pull Settings Now",
 			url: "#",
 			preventDefault: true,
 			tags: ["settings", "sync", "pull", "download", "remote"],
@@ -61,8 +66,10 @@ export const syncActions = (
 							if (!data?.configuration) {
 								addNotification(
 									options({
-										heading: "Settings Sync",
-										description: "No remote configuration found",
+										heading: get(locale)().settings.settingsSync.title,
+										description:
+											get(locale)().commandPalette?.sync?.noRemoteFound ??
+											"No remote configuration found",
 									}),
 								);
 
@@ -77,7 +84,11 @@ export const syncActions = (
 							});
 
 							addNotification(
-								options({ heading: "Pulled remote configuration" }),
+								options({
+									heading:
+										get(locale)().notifications?.pulledRemote ??
+										"Pulled remote configuration",
+								}),
 							);
 						});
 					})
@@ -88,14 +99,20 @@ export const syncActions = (
 
 	if (syncEnabled)
 		actions.push({
-			name: "Disable Settings Sync",
+			name: l.commandPalette?.sync?.disable ?? "Disable Settings Sync",
 			url: "#",
 			preventDefault: true,
 			tags: ["settings", "sync", "disable", "off", "stop"],
 			onClick: () => {
 				settings.setKey("settingsSync", false);
 
-				addNotification(options({ heading: "Settings sync disabled" }));
+				addNotification(
+					options({
+						heading:
+							get(locale)().notifications?.syncDisabled ??
+							"Settings sync disabled",
+					}),
+				);
 			},
 		});