diff --git a/packages/client/src/components/MkDrive.file.vue b/packages/client/src/components/MkDrive.file.vue
index 80a428adc3..6d348a33e7 100644
--- a/packages/client/src/components/MkDrive.file.vue
+++ b/packages/client/src/components/MkDrive.file.vue
@@ -182,8 +182,8 @@ function describe() {
 		},
 		{
 			done: (result: {
-				canceled: boolean,
-				result?: string | null,
+				canceled: boolean;
+				result?: string | null;
 			}) => {
 				if (!result || result.canceled) return;
 				const comment = result.result;
diff --git a/packages/client/src/components/MkLaunchPad.vue b/packages/client/src/components/MkLaunchPad.vue
index 084283c270..b3ca7bd34d 100644
--- a/packages/client/src/components/MkLaunchPad.vue
+++ b/packages/client/src/components/MkLaunchPad.vue
@@ -73,7 +73,7 @@ import { deviceKind } from "@/scripts/device-kind";
 const props = withDefaults(
 	defineProps<{
 		src?: HTMLElement;
-		anchor?: { 
+		anchor?: {
 			x: "left" | "center" | "right";
 			y: "top" | "center" | "bottom";
 		};
diff --git a/packages/client/src/components/MkModal.vue b/packages/client/src/components/MkModal.vue
index 57ecc1b0d8..2bed9f8295 100644
--- a/packages/client/src/components/MkModal.vue
+++ b/packages/client/src/components/MkModal.vue
@@ -108,7 +108,7 @@ type ModalTypes = "popup" | "dialog" | "dialog:top" | "drawer";
 const props = withDefaults(
 	defineProps<{
 		manualShowing?: boolean | null;
-		anchor?: { 
+		anchor?: {
 			x: "left" | "center" | "right";
 			y: "top" | "center" | "bottom";
 		};
diff --git a/packages/client/src/components/MkModalPageWindow.vue b/packages/client/src/components/MkModalPageWindow.vue
index e9c8136ae4..a4dea9ee32 100644
--- a/packages/client/src/components/MkModalPageWindow.vue
+++ b/packages/client/src/components/MkModalPageWindow.vue
@@ -29,7 +29,7 @@
 				<button
 					class="_button"
 					:aria-label="i18n.ts.close"
-					@click="$refs.modal.close()"
+					@click="modal!.close()"
 				>
 					<i :class="icon('ph-x')"></i>
 				</button>
@@ -65,6 +65,7 @@ import type { PageMetadata } from "@/scripts/page-metadata";
 import { provideMetadataReceiver } from "@/scripts/page-metadata";
 import { Router } from "@/nirax";
 import icon from "@/scripts/icon";
+import type { MenuItem } from "@/types/menu";
 
 const props = defineProps<{
 	initialPath: string;
@@ -81,11 +82,11 @@ router.addListener("push", (ctx) => {});
 
 const pageMetadata = ref<null | ComputedRef<PageMetadata>>();
 const rootEl = ref();
-const modal = ref<InstanceType<typeof MkModal>>();
+const modal = ref<InstanceType<typeof MkModal> | null>(null);
 const path = ref(props.initialPath);
 const width = ref(860);
 const height = ref(660);
-const history = [];
+const history: string[] = [];
 
 provide("router", router);
 provideMetadataReceiver((info) => {
@@ -95,7 +96,7 @@ provide("shouldOmitHeaderTitle", true);
 provide("shouldHeaderThin", true);
 
 const pageUrl = computed(() => url + path.value);
-const contextmenu = computed(() => {
+const contextmenu = computed((): MenuItem[] => {
 	return [
 		{
 			type: "label",
@@ -117,7 +118,7 @@ const contextmenu = computed(() => {
 			text: i18n.ts.openInNewTab,
 			action: () => {
 				window.open(pageUrl.value, "_blank");
-				modal.value.close();
+				modal.value!.close();
 			},
 		},
 		{
@@ -130,23 +131,26 @@ const contextmenu = computed(() => {
 	];
 });
 
-function navigate(path, record = true) {
+function navigate(path: string, record = true) {
 	if (record) history.push(router.getCurrentPath());
 	router.push(path);
 }
 
 function back() {
-	navigate(history.pop(), false);
+	const backTo = history.pop();
+	if (backTo) {
+		navigate(backTo, false);
+	}
 }
 
 function expand() {
 	mainRouter.push(path.value);
-	modal.value.close();
+	modal.value!.close();
 }
 
 function popout() {
 	_popout(path.value, rootEl.value);
-	modal.value.close();
+	modal.value!.close();
 }
 
 function onContextmenu(ev: MouseEvent) {
diff --git a/packages/client/src/nirax.ts b/packages/client/src/nirax.ts
index f214060762..da162338b6 100644
--- a/packages/client/src/nirax.ts
+++ b/packages/client/src/nirax.ts
@@ -6,7 +6,7 @@ import { shallowRef } from "vue";
 import { safeURIDecode } from "@/scripts/safe-uri-decode";
 import { pleaseLogin } from "@/scripts/please-login";
 
-interface RouteDef {
+export interface RouteDef {
 	path: string;
 	component: Component;
 	query?: Record<string, string>;
diff --git a/packages/client/src/os.ts b/packages/client/src/os.ts
index 32d84396ef..49d03b76cc 100644
--- a/packages/client/src/os.ts
+++ b/packages/client/src/os.ts
@@ -3,10 +3,7 @@
 import { EventEmitter } from "eventemitter3";
 import { type entities, api as firefishApi } from "firefish-js";
 import insertTextAtCursor from "insert-text-at-cursor";
-import type {
-	Component,
-	Ref,
-} from "vue";
+import type { Component, Ref } from "vue";
 import { defineAsyncComponent, markRaw, ref } from "vue";
 import { i18n } from "./i18n";
 import MkDialog from "@/components/MkDialog.vue";
@@ -177,11 +174,13 @@ export function promiseDialog<T>(
 }
 
 let popupIdCount = 0;
-export const popups = ref<{
-	id: number;
-	component: Component;
-	props: Record<string, unknown>;
-}[]>([]);
+export const popups = ref<
+	{
+		id: number;
+		component: Component;
+		props: Record<string, unknown>;
+	}[]
+>([]);
 
 const zIndexes = {
 	low: 1000000,
diff --git a/packages/client/src/router.ts b/packages/client/src/router.ts
index a21df2981e..7273919261 100644
--- a/packages/client/src/router.ts
+++ b/packages/client/src/router.ts
@@ -1,18 +1,18 @@
 import type { AsyncComponentLoader } from "vue";
 import { defineAsyncComponent, inject } from "vue";
 import { isEmojiMod, isModerator, me } from "@/me";
-import { Router } from "@/nirax";
+import { type RouteDef, Router } from "@/nirax";
 import MkError from "@/pages/_error_.vue";
 import MkLoading from "@/pages/_loading_.vue";
 
-const page = (loader: AsyncComponentLoader<any>) =>
+const page = (loader: AsyncComponentLoader) =>
 	defineAsyncComponent({
 		loader,
 		loadingComponent: MkLoading,
 		errorComponent: MkError,
 	});
 
-export const routes = [
+export const routes: RouteDef[] = [
 	{
 		path: "/@:initUser/pages/:initPageName/view-source",
 		component: page(() => import("./pages/page-editor/page-editor.vue")),
diff --git a/packages/client/src/scripts/page-metadata.ts b/packages/client/src/scripts/page-metadata.ts
index e2f470d0bb..cf8d7938a7 100644
--- a/packages/client/src/scripts/page-metadata.ts
+++ b/packages/client/src/scripts/page-metadata.ts
@@ -12,6 +12,7 @@ export interface PageMetadata {
 	avatar?: entities.UserDetailed | null;
 	userName?: entities.User | null;
 	bg?: string;
+	hideHeader?: boolean;
 }
 
 export function definePageMetadata(
diff --git a/packages/firefish-js/src/api.types.ts b/packages/firefish-js/src/api.types.ts
index 73e9fca69f..890e6bcd48 100644
--- a/packages/firefish-js/src/api.types.ts
+++ b/packages/firefish-js/src/api.types.ts
@@ -281,9 +281,9 @@ export type Endpoints = {
 	"drive/files/attached-notes": { req: TODO; res: Note[] };
 	"drive/files/caption-image": {
 		req: {
-			url: string,
-		}
-		res: string,
+			url: string;
+		};
+		res: string;
 	};
 	"drive/files/check-existence": { req: TODO; res: TODO };
 	"drive/files/create": { req: TODO; res: TODO };