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.

5 files changed, 256 insertions, 215 deletions

diff --git a/src/lib/CommandPalette/CommandPalette.svelte b/src/lib/CommandPalette/CommandPalette.svelte
index b68d468d..04eabff9 100644
--- a/src/lib/CommandPalette/CommandPalette.svelte
+++ b/src/lib/CommandPalette/CommandPalette.svelte
@@ -3,6 +3,7 @@ import { onMount } from "svelte";
 import { fly, fade } from "svelte/transition";
 import { flip } from "svelte/animate";
 import type { CommandPaletteAction } from "./actions";
+import locale from "$stores/locale";
 
 export let items: CommandPaletteAction[] = [];
 export let open = false;
@@ -176,7 +177,7 @@ const handleGlobalKey = (e: KeyboardEvent) => {
     class="dropdown {open ? 'fade-in' : 'fade-out'}"
     role="dialog"
     aria-modal="true"
-    aria-label="Command palette"
+    aria-label={$locale().commandPalette?.ariaLabel}
   >
     <div class="dropdown-content card card-small card-glass">
       <input
@@ -184,8 +185,8 @@ const handleGlobalKey = (e: KeyboardEvent) => {
         bind:value={search}
         class="command-input"
         type="text"
-        placeholder="Search"
-        aria-label="Search commands"
+        placeholder={$locale().commandPalette?.placeholder}
+        aria-label={$locale().commandPalette?.searchCommands}
         autocomplete="off"
         spellcheck="false"
         role="combobox"
@@ -196,7 +197,12 @@ const handleGlobalKey = (e: KeyboardEvent) => {
         onkeydown={handleKey}
       />
 
-      <div class="results-container" role="listbox" id={listboxId} aria-label="Commands">
+      <div
+        class="results-container"
+        role="listbox"
+        id={listboxId}
+        aria-label={$locale().commandPalette?.commands}
+      >
         {#each filtered as item, i (item.id || item.url)}
           <a
             id={optionDomId(i)}
@@ -220,7 +226,7 @@ const handleGlobalKey = (e: KeyboardEvent) => {
 
         {#if filtered.length === 0 && search !== ''}
           <div class="no-results opaque" role="status" in:fade={{ duration: 150 }}>
-            No results found
+            {$locale().commandPalette?.noResults}
           </div>
         {/if}
       </div>
diff --git a/src/lib/CommandPalette/actions.ts b/src/lib/CommandPalette/actions.ts
index 9915fe66..d2ed5a1d 100644
--- a/src/lib/CommandPalette/actions.ts
+++ b/src/lib/CommandPalette/actions.ts
@@ -1,4 +1,6 @@
 import { invalidateListCaches } from "$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,
+		},
+	];
+};
diff --git a/src/lib/CommandPalette/authActions.ts b/src/lib/CommandPalette/authActions.ts
index c306eb34..9dbc9565 100644
--- a/src/lib/CommandPalette/authActions.ts
+++ b/src/lib/CommandPalette/authActions.ts
@@ -1,15 +1,19 @@
 import { env } from "$env/dynamic/public";
 import root from "$lib/Utility/root";
 import localforage from "localforage";
+import locale from "$stores/locale";
+import { get } from "svelte/store";
 import type { CommandPaletteAction } from "./actions";
 
 export const authActions = (
 	user: string | undefined,
 ): CommandPaletteAction[] => {
+	const l = get(locale)();
+
 	if (user)
 		return [
 			{
-				name: "Log Out",
+				name: l.commandPalette?.logOut ?? "Log Out",
 				url: "#",
 				preventDefault: true,
 				tags: ["auth", "sign", "out", "user"],
@@ -29,7 +33,7 @@ export const authActions = (
 
 	return [
 		{
-			name: "Log In",
+			name: l.commandPalette?.logIn ?? "Log In",
 			url: loginUrl,
 			preventDefault: true,
 			tags: ["auth", "sign", "in", "anilist"],
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",
+					}),
+				);
 			},
 		});
 
diff --git a/src/lib/CommandPalette/toggleActions.ts b/src/lib/CommandPalette/toggleActions.ts
index ca64ff5f..9ba1d121 100644
--- a/src/lib/CommandPalette/toggleActions.ts
+++ b/src/lib/CommandPalette/toggleActions.ts
@@ -1,4 +1,6 @@
 import settings, { type Settings } from "$stores/settings";
+import locale from "$stores/locale";
+import { get } from "svelte/store";
 import type { CommandPaletteAction } from "./actions";
 
 const TITLE_FORMATS: Settings["displayTitleFormat"][] = [
@@ -51,82 +53,84 @@ export const toggleActions = (current: Settings): CommandPaletteAction[] => {
 	const nextOutbound =
 		OUTBOUND_TARGETS[(outboundIndex + 1) % OUTBOUND_TARGETS.length];
 
+	const t = get(locale)().commandPalette?.toggles;
+
 	return [
 		boolToggle(
 			current.display24HourTime,
 			"display24HourTime",
-			"Switch to 24-hour time",
-			"Switch to 12-hour time",
+			t?.time24On ?? "Switch to 24-hour time",
+			t?.time24Off ?? "Switch to 12-hour time",
 			["time", "clock", "24h", "12h", "format"],
 		),
 		boolToggle(
 			current.displayDisableAnimations,
 			"displayDisableAnimations",
-			"Disable animations",
-			"Enable animations",
+			t?.animationsOff ?? "Disable animations",
+			t?.animationsOn ?? "Enable animations",
 			["motion", "animation", "accessibility"],
 		),
 		boolToggle(
 			current.displayBlurAdultContent,
 			"displayBlurAdultContent",
-			"Blur adult content",
-			"Show adult content unblurred",
+			t?.blurAdultOn ?? "Blur adult content",
+			t?.blurAdultOff ?? "Show adult content unblurred",
 			["nsfw", "adult", "blur", "censor"],
 		),
 		boolToggle(
 			current.displayCoverModeAnime,
 			"displayCoverModeAnime",
-			"Show anime covers",
-			"Hide anime covers",
+			t?.showAnimeCovers ?? "Show anime covers",
+			t?.hideAnimeCovers ?? "Hide anime covers",
 			["cover", "image", "anime", "display"],
 		),
 		boolToggle(
 			current.displayCoverModeManga,
 			"displayCoverModeManga",
-			"Show manga covers",
-			"Hide manga covers",
+			t?.showMangaCovers ?? "Show manga covers",
+			t?.hideMangaCovers ?? "Hide manga covers",
 			["cover", "image", "manga", "novels", "display"],
 		),
 		boolToggle(
 			current.displayHoverCover,
 			"displayHoverCover",
-			"Enable hover cover preview",
-			"Disable hover cover preview",
+			t?.hoverCoverOn ?? "Enable hover cover preview",
+			t?.hoverCoverOff ?? "Disable hover cover preview",
 			["cover", "hover", "preview"],
 		),
 		boolToggle(
 			current.displayScheduleListMode,
 			"displayScheduleListMode",
-			"Schedule: list mode",
-			"Schedule: grid mode",
+			t?.scheduleListMode ?? "Schedule: list mode",
+			t?.scheduleGridMode ?? "Schedule: grid mode",
 			["schedule", "list", "grid", "view"],
 		),
 		boolToggle(
 			current.displayReverseSort,
 			"displayReverseSort",
-			"Reverse sort order",
-			"Restore default sort order",
+			t?.reverseSort ?? "Reverse sort order",
+			t?.restoreSort ?? "Restore default sort order",
 			["sort", "reverse", "order"],
 		),
 		boolToggle(
 			current.displayDataSaver,
 			"displayDataSaver",
-			"Enable data saver",
-			"Disable data saver",
+			t?.dataSaverOn ?? "Enable data saver",
+			t?.dataSaverOff ?? "Disable data saver",
 			["data", "bandwidth", "saver", "performance"],
 		),
 		boolToggle(
 			current.displayDisableNotifications,
 			"displayDisableNotifications",
-			"Disable in-app notifications",
-			"Enable in-app notifications",
+			t?.notificationsOff ?? "Disable in-app notifications",
+			t?.notificationsOn ?? "Enable in-app notifications",
 			["notifications", "alerts", "toast"],
 		),
 		{
 			name:
 				current.displayLanguage === "en"
-					? "Switch language to 日本語"
-					: "Switch language to English",
+					? (t?.switchLanguageJa ?? "Switch language to 日本語")
+					: (t?.switchLanguageEn ?? "Switch language to English"),
 			url: "#",
 			preventDefault: true,
 			tags: ["language", "locale", "translate", "japanese", "english"],
@@ -137,14 +141,18 @@ export const toggleActions = (current: Settings): CommandPaletteAction[] => {
 				),
 		},
 		{
-			name: `Title format: ${current.displayTitleFormat} → ${nextTitle}`,
+			name: (t?.titleFormat ?? "Title format: {from} → {to}")
+				.replace("{from}", current.displayTitleFormat)
+				.replace("{to}", nextTitle),
 			url: "#",
 			preventDefault: true,
 			tags: ["title", "format", "english", "romaji", "native"],
 			onClick: () => settings.setKey("displayTitleFormat", nextTitle),
 		},
 		{
-			name: `Outbound links: ${OUTBOUND_LABELS[current.displayOutboundLinksTo]} → ${OUTBOUND_LABELS[nextOutbound]}`,
+			name: (t?.outboundLinks ?? "Outbound links: {from} → {to}")
+				.replace("{from}", OUTBOUND_LABELS[current.displayOutboundLinksTo])
+				.replace("{to}", OUTBOUND_LABELS[nextOutbound]),
 			url: "#",
 			preventDefault: true,
 			tags: [