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, 181 insertions, 175 deletions

diff --git a/src/lib/CommandPalette/actions.ts b/src/lib/CommandPalette/actions.ts
index 9915fe66..d2ed5a1d 100644
--- a/src/lib/CommandPalette/actions.ts
+++ b/src/lib/CommandPalette/actions.ts
@@ -1,4 +1,6 @@
 import { invalidateListCaches } from "$lib/Media/invalidate";
+import locale from "$stores/locale";
+import { get } from "svelte/store";
 
 export interface CommandPaletteAction {
 	name: string;
@@ -9,178 +11,182 @@ export interface CommandPaletteAction {
 	actions?: CommandPaletteAction[];
 }
 
-export const defaultActions: CommandPaletteAction[] = [
-	{
-		name: "Home",
-		url: "/",
-		tags: [
-			"main",
-			"manga",
-			"anime",
-			"light",
-			"dashboard",
-			"start",
-			"begin",
-			"novels",
-			"list",
-		],
-		actions: [
-			{
-				name: "Upcoming Episodes",
-				url: "/",
-				tags: ["anime", "list"],
-			},
-			{
-				name: "Not Yet Released",
-				url: "/",
-				tags: ["anime", "schedule", "list"],
-			},
-			{
-				name: "Due Episodes",
-				url: "/",
-				tags: ["anime", "list"],
-			},
-			{
-				name: "Manga & Light Novels",
-				url: "/",
-				tags: ["novels", "manga", "list"],
-			},
-		],
-	},
-	{
-		name: "Completed",
-		url: "/completed",
-		tags: [
-			"finish",
-			"end",
-			"done",
-			"finish",
-			"end",
-			"done",
-			"anime",
-			"novels",
-			"manga",
-		],
-		actions: [
-			{
-				name: "Anime",
-				url: "/completed",
-				tags: ["anime", "list"],
-			},
-			{
-				name: "Manga & Light Novels",
-				url: "/completed",
-				tags: ["novels", "manga", "list"],
-			},
-		],
-	},
-	{
-		name: "Subtitle Schedule",
-		url: "/schedule",
-		tags: ["anime", "subs"],
-	},
-	{
-		name: "hololive Schedule",
-		url: "/hololive",
-		tags: ["vtuber", "youtube", "virtual", "twitch", "stream"],
-	},
-	{
-		name: "Character Birthdays",
-		url: "/birthdays",
-		tags: ["schedule", "vtuber", "date"],
-	},
-	{
-		name: "New Releases",
-		url: "/releases",
-		tags: ["novels", "manga", "date", "schedule", "time"],
-	},
-	{
-		name: "Settings",
-		url: "/settings",
-		tags: [
-			"sync",
-			"display",
-			"hide",
-			"panels",
-			"motion",
-			"accessibility",
-			"notifications",
-			"rss",
-			"warning",
-			"show",
-			"links",
-			"sort",
-			"calculation",
-			"cache",
-			"clear",
-			"debug",
-			"language",
-			"locale",
-		],
-		actions: [
-			{
-				name: "Settings Sync",
-				url: "/settings#sync",
-				tags: ["settings"],
-			},
-			{
-				name: "RSS Feeds",
-				url: "/settings#feeds",
-				tags: ["settings"],
-			},
-			{
-				name: "Display",
-				url: "/settings",
-				tags: ["settings"],
-			},
-			{
-				name: "Calculation",
-				url: "/settings",
-				tags: ["settings"],
-			},
-			{
-				name: "Cache",
-				url: "/settings",
-				tags: ["settings"],
-			},
-			{
-				name: "Debug",
-				url: "/settings#debug",
-				tags: ["settings"],
-			},
-		],
-	},
-	{
-		name: "My Profile",
-		url: "/user",
-		tags: ["user", "me", "settings"],
-		actions: [
-			{
-				name: "User Preferences",
-				url: "/user",
-				tags: ["user", "me", "settings"],
-			},
-		],
-	},
-	{
-		name: "My Badge Wall",
-		url: "/user?badges=1",
-		tags: ["user", "me", "settings"],
-	},
-	{
-		name: "Refresh Anime & Manga List Caches",
-		url: "",
-		preventDefault: true,
-		tags: [
-			"cache",
-			"clear",
-			"refresh",
-			"invalidate",
-			"debug",
-			"anime",
-			"manga",
-			"list",
-		],
-		onClick: invalidateListCaches,
-	},
-];
+export const defaultActions = (): CommandPaletteAction[] => {
+	const l = get(locale)();
+
+	return [
+		{
+			name: l.navigation.home,
+			url: "/",
+			tags: [
+				"main",
+				"manga",
+				"anime",
+				"light",
+				"dashboard",
+				"start",
+				"begin",
+				"novels",
+				"list",
+			],
+			actions: [
+				{
+					name: l.lists.upcoming.episodes.title,
+					url: "/",
+					tags: ["anime", "list"],
+				},
+				{
+					name: l.lists.upcoming.notYetReleased.title,
+					url: "/",
+					tags: ["anime", "schedule", "list"],
+				},
+				{
+					name: l.lists.due.episodes.title,
+					url: "/",
+					tags: ["anime", "list"],
+				},
+				{
+					name: l.lists.due.mangaAndLightNovels.title,
+					url: "/",
+					tags: ["novels", "manga", "list"],
+				},
+			],
+		},
+		{
+			name: l.navigation.completed,
+			url: "/completed",
+			tags: [
+				"finish",
+				"end",
+				"done",
+				"finish",
+				"end",
+				"done",
+				"anime",
+				"novels",
+				"manga",
+			],
+			actions: [
+				{
+					name: l.settings.media.anime,
+					url: "/completed",
+					tags: ["anime", "list"],
+				},
+				{
+					name: l.lists.completed.mangaAndLightNovels.title,
+					url: "/completed",
+					tags: ["novels", "manga", "list"],
+				},
+			],
+		},
+		{
+			name: l.navigation.subtitleSchedule,
+			url: "/schedule",
+			tags: ["anime", "subs"],
+		},
+		{
+			name: l.navigation.hololive,
+			url: "/hololive",
+			tags: ["vtuber", "youtube", "virtual", "twitch", "stream"],
+		},
+		{
+			name: l.tools.tool.characterBirthdays.short,
+			url: "/birthdays",
+			tags: ["schedule", "vtuber", "date"],
+		},
+		{
+			name: l.navigation.newReleases,
+			url: "/releases",
+			tags: ["novels", "manga", "date", "schedule", "time"],
+		},
+		{
+			name: l.navigation.settings,
+			url: "/settings",
+			tags: [
+				"sync",
+				"display",
+				"hide",
+				"panels",
+				"motion",
+				"accessibility",
+				"notifications",
+				"rss",
+				"warning",
+				"show",
+				"links",
+				"sort",
+				"calculation",
+				"cache",
+				"clear",
+				"debug",
+				"language",
+				"locale",
+			],
+			actions: [
+				{
+					name: l.settings.settingsSync.title,
+					url: "/settings#sync",
+					tags: ["settings"],
+				},
+				{
+					name: l.settings.rssFeeds.title,
+					url: "/settings#feeds",
+					tags: ["settings"],
+				},
+				{
+					name: l.settings.display.title,
+					url: "/settings",
+					tags: ["settings"],
+				},
+				{
+					name: l.settings.calculation.title,
+					url: "/settings",
+					tags: ["settings"],
+				},
+				{
+					name: l.settings.cache.title,
+					url: "/settings",
+					tags: ["settings"],
+				},
+				{
+					name: l.settings.debug.title,
+					url: "/settings#debug",
+					tags: ["settings"],
+				},
+			],
+		},
+		{
+			name: l.navigation.myProfile,
+			url: "/user",
+			tags: ["user", "me", "settings"],
+			actions: [
+				{
+					name: l.user.preferences.title,
+					url: "/user",
+					tags: ["user", "me", "settings"],
+				},
+			],
+		},
+		{
+			name: l.navigation.myBadgeWall,
+			url: "/user?badges=1",
+			tags: ["user", "me", "settings"],
+		},
+		{
+			name: l.commandPalette?.refreshCaches ?? "Refresh Anime & Manga List Caches",
+			url: "",
+			preventDefault: true,
+			tags: [
+				"cache",
+				"clear",
+				"refresh",
+				"invalidate",
+				"debug",
+				"anime",
+				"manga",
+				"list",
+			],
+			onClick: invalidateListCaches,
+		},
+	];
+};