v0.2: All videos folder, shared watched state, release-order sorting, official icon, OAuth plumbing, docs

- per-creator "All videos" folder (release order across sub-channels); sub-channel copies use
  cpost: ids and UserDataMirror keeps played/resume state in sync
- SortNameUpdater forces release-order sort names so every client lists newest first by default
- official Floatplane icon as channel image (Primary only — a channel Thumb hid video thumbnails
  in Continue Watching) and as 16:9 plugin thumbnail; one-time image replacement on upgrade
- OAuth device-flow login (FloatplaneAuthService + settings UI); needs a Floatplane client id;
  Turnstile verified domain-bound so password login inside Jellyfin is impossible
- generic install.sh (linuxserver / official image / native), thumb.png in package + manifest
- README rewritten for a general audience, doc/usage.md with screenshots, 60 tests

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

Jellyfin.Plugin.Floatplane/Configuration/PluginConfiguration.cs

@@ -32,9 +32,27 @@ public class PluginConfiguration : BasePluginConfiguration
     /// <summary>Highest level offered as a version at all (keeps 4K out of the list by default).</summary>
     public int MaxHeight { get; set; } = 1080;
 
-    /// <summary>How many posts (newest first) are listed per Floatplane channel.</summary>
+    /// <summary>How many posts (newest first) are listed per Floatplane sub-channel.</summary>
     public int MaxPostsPerChannel { get; set; } = 100;
 
+    /// <summary>How many posts (newest first) the per-creator "All videos" folder lists.</summary>
+    public int MaxPostsAllVideos { get; set; } = 200;
+
+    /// <summary>
+    /// OAuth client id registered with Floatplane for this plugin. Empty = OAuth login
+    /// unavailable (use the cookie). See the README for how to obtain one.
+    /// </summary>
+    public string OAuthClientId { get; set; } = string.Empty;
+
+    /// <summary>OAuth access token (short-lived, refreshed automatically).</summary>
+    public string OAuthAccessToken { get; set; } = string.Empty;
+
+    /// <summary>OAuth refresh token (≈90 days, rotated on refresh). Presence = logged in via OAuth.</summary>
+    public string OAuthRefreshToken { get; set; } = string.Empty;
+
+    /// <summary>Unix time (seconds) when the access token expires.</summary>
+    public long OAuthAccessTokenExpiry { get; set; }
+
     /// <summary>Show posts the account cannot access (higher tier) as locked items.</summary>
     public bool ShowLockedPosts { get; set; }
 
@@ -59,6 +77,9 @@ public class PluginConfiguration : BasePluginConfiguration
     /// <summary>Hours between automatic catalogue refreshes (scheduled task).</summary>
     public int SyncIntervalHours { get; set; } = 6;
 
+    /// <summary>Version of the channel logo Jellyfin last stored (internal; drives a one-time image refresh).</summary>
+    public int ChannelImageVersion { get; set; }
+
     /// <summary>Report watch progress back to Floatplane (not implemented yet).</summary>
     public bool SyncProgressToFloatplane { get; set; }
 }