menu refactor + web account switcher (#7307)

* add account switcher, migrate context menus to overflow menu system, update version filter controls, only pad instance icons

* app account switcher, improve some context menus, theme stuff

* prepr

* handle reauthentication

* fix a couple sign in issues, admin page cleanup, fix org status badges, fix official account badge, open in local keybind, publish plus icons

* rename generic menus to ButtonMenu (& types)

* fix hydration issue w/ dropdowns + middleware error

apps/app-frontend/src/helpers/account-appearance.ts

@@ -0,0 +1,29 @@
+const STORAGE_KEY = 'modrinth-account-appearances'
+
+function readCache(): Record<string, { auto: boolean; theme: string }> {
+	try {
+		const parsed = JSON.parse(window.localStorage.getItem(STORAGE_KEY) ?? '')
+		if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) return {}
+		return parsed
+	} catch {
+		return {}
+	}
+}
+
+export function rememberAccountAppearance(
+	userId: string,
+	appearance: { auto: boolean; theme: string },
+) {
+	try {
+		window.localStorage.setItem(
+			STORAGE_KEY,
+			JSON.stringify({ ...readCache(), [userId]: appearance }),
+		)
+	} catch {
+		// storage blocked or full
+	}
+}
+
+export function getAccountAppearance(userId: string) {
+	return readCache()[userId]
+}