"me-web?" 0.9.0: first it shows you where this leads, then it checks

- The first time you open the app, two short pages come before the check. The first shows a photo you take far from home going to a small computer in your house, and on to your parents' tablet a moment later. The second shows what that takes: a computer that stays on, and a connection with an address of its own. A house with its own number lets the visitor in; a block of flats that shares one number stops them at the main door. Many connections have their own address, and when one doesn't there is often a way round it.
- Swipe, or press Next. Skip goes straight to the check. "What could I do with this?" on the first screen shows the two pages again.
- The first screen now says only what the check finds out, so it no longer repeats the pages.
- On Android the back button goes to the previous page, and closes the information and share panels.
- Every language has the new words, written for people who are not technical; translations other than English and Italian are still drafts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

src/MeWeb.App/Services/AppSettings.cs

@@ -5,6 +5,8 @@ namespace MeWeb.App.Services;
 public class StoredSettings
 {
   public string Language { get; set; }
+
+  public bool IntroSeen { get; set; }
 }
 
 public static class AppSettings