Fix guest sign-in on Jellyfin 12 (#22)

The sign-in page stored the guest's server entry with LastConnectionMode 1
(Remote) but only a ManualAddress. jellyfin-web 12 builds its ApiClient from
that entry, gets no address, throws "Must supply a serverAddress" and never
leaves the splash screen. Store mode 2 (Manual), which is what jellyfin-web
itself writes after a normal sign-in.

Also hide the Modern layout header links, user menu and drawer toggle for
guests (Modern is the default in 12), and close the item action sheet on
desktop when ShareLink opens its popup. Escape only closes it in the TV
layout, a click on the dialog container works everywhere.

Bump to 1.0.6.0.

README.md

@@ -3,7 +3,7 @@
 Share a movie, episode, season or series with a link. The person you send it to does not need
 an account and can only access what you shared. You choose when the link expires.
 
-`Jellyfin 10.11` · `.NET 9` · `no account for the guest` · `access restricted on the server` · `automatic cleanup`
+`Jellyfin 10.11 and 12` · `.NET 9` · `no account for the guest` · `access restricted on the server` · `automatic cleanup`
 
 ShareLinks adds a **ShareLink** entry to the context menu of any movie, series, season or episode.
 Choose an expiry date and copy the link. Whoever opens it goes straight to the shared title,
@@ -181,8 +181,10 @@ it in `token-secret.key`.
 
 ## Compatibility
 
-Jellyfin **10.11** (`targetAbi 10.11.0.0`), .NET 9. Tested on 10.11.8 and 10.11.11. The web-client injection
-targets the shipped client, in English and in French.
+Jellyfin **10.11** and **12** from a single build (`targetAbi 10.11.0.0`, .NET 9, which Jellyfin 12's
+.NET 10 runtime loads as is). Tested on 10.11.0, 10.11.5, 10.11.8, 10.11.9, 10.11.11, 12.0 and 12.1.
+The web-client injection targets the shipped client, in the Legacy and Modern layouts, in English
+and in French.
 
 ## Workflow