Right rail, top bar, bottom bar and chat border: Socials slide-out drawer, tab icons and colors, EDIT toggle, stream readouts moved to the top-left cell, webcam border restored, chat border controls, 30fps vertical tier

- Socials: the dialog is a right-rail drawer (same pattern as Stream Info/YPP/TEST); the live-screen button is removed
- Right rail: Stream Info (was Stream Settings) and YPP show the YouTube logo; Socials and TEST get icons; tab colors and label colors per spec
- Top bar: EDIT toggle beside REC (orange when on, blue when off); going live on YouTube turns it off
- Stream readouts (bitrate, FPS, dropped n (x.y%), Live hh:mm:ss, health) and the resolution dropdown moved to the top-left cell; bottom bar emptied at the same height
- Webcam border drawing restored (it was removed with the CRT bezel change)
- YouTube chat layer: border color, thickness, and opacity controls
- Vertical 1080p30 tier added

Not related to the fps gate yet; no gating is enforced.

ViewModels/MainViewModel.Socials.cs

@@ -119,20 +119,46 @@ public partial class MainViewModel
     /// Opens the Social Media Site Promotion dialog (6 slots, sign-in gate,
     /// validation). On save the working copy replaces <see cref="_socials"/>.
     /// </summary>
+    /// <summary>The Socials pull-out (same drawer pattern as Stream Settings / YPP / TEST).</summary>
+    public bool SocialsDrawerOpen { get; private set; }
+
+    public SocialsDialogViewModel? SocialsDrawer { get; private set; }
+
     private void OpenSocialDialog()
     {
+        if (SocialsDrawerOpen)
+        {
+            CloseSocialsDrawer();
+            return;
+        }
         var dialog = new SocialsDialogViewModel(
             _socialValidator,
             SignInAsync,
             SignOutYouTubeAsync,
             _youtubeAuth.CurrentChannel,
             _socials);
-        var window = new ytLive.SocialsDialog(dialog) { Owner = Application.Current.MainWindow };
-        if (window.ShowDialog() == true)
+        dialog.SaveRequested += () =>
         {
             _socials = dialog.BuildSocialsConfig();
             NotifySocialsChanged();
-        }
+            CloseSocialsDrawer();
+        };
+        dialog.CancelRequested += CloseSocialsDrawer;
+        SocialsDrawer = dialog;
+        BroadcastForm.IsDrawerOpen = false;
+        Ypp.IsDrawerOpen = false;
+        TestSession.IsDrawerOpen = false;
+        SocialsDrawerOpen = true;
+        OnPropertyChanged(nameof(SocialsDrawer));
+        OnPropertyChanged(nameof(SocialsDrawerOpen));
+    }
+
+    internal void CloseSocialsDrawer()
+    {
+        if (!SocialsDrawerOpen) return;
+        SocialsDrawerOpen = false;
+        SocialsDrawer?.AbortPending();
+        OnPropertyChanged(nameof(SocialsDrawerOpen));
     }
 
     private void NotifySocialsChanged()