docs: finish user guide updates (#11603)

* finished settings changes

* fix todos

* update titles

www/apps/user-guide/app/page.mdx

@@ -1,15 +1,13 @@
 import { BellAlert, SidebarLeft } from "@medusajs/icons"
 
 export const metadata = {
-  title: `Medusa Admin User Guide`,
+  title: `Medusa Admin User Guide in Medusa Admin`,
 }
 
 # {metadata.title}
 
 Welcome to the Medusa Admin user guide. This user guide is intended to help admin users learn how they can use the Medusa Admin to perform commerce operations and manage their store.
 
-{/* TODO update photo */}
-
 ![Medusa Admin Overview](https://res.cloudinary.com/dza7lstvk/image/upload/v1739530936/User%20Guide/Screenshot_2025-02-14_at_1.01.35_PM_ecyltl.png)
 
 ## Who is this guide for?
@@ -95,6 +93,4 @@ Learn how to change the language in [this guide](./settings/profile/page.mdx#cha
 
 The Medusa Admin comes in light and dark themes. You can change the theme by clicking the profile item at the bottom of the sidebar -> Theme -> Light, Dark, or System, defaulting to your Operating System or Browser theme.
 
-{/* TODO add dark theme */}
-
 ![Dark Theme](https://res.cloudinary.com/dza7lstvk/image/upload/v1739530936/User%20Guide/Screenshot_2025-02-14_at_1.01.56_PM_fdcgmz.png)