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.

SocialsDialog.xaml

@@ -1,18 +1,14 @@
-<Window x:Class="ytLive.SocialsDialog"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        Title="Social Media Site Promotion" Height="520" Width="520"
-        Icon="/Assets/llamacasty-icon.png"
-        WindowStartupLocation="CenterOwner" ResizeMode="NoResize"
-        ShowInTaskbar="False" Background="#1a1a2e">
+<UserControl x:Class="ytLive.SocialsDialog"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
 
-    <Window.Resources>
+    <UserControl.Resources>
         <ResourceDictionary>
             <BooleanToVisibilityConverter x:Key="BoolToVis"/>
         </ResourceDictionary>
-    </Window.Resources>
+    </UserControl.Resources>
 
-    <Grid Margin="24">
+    <Grid Margin="0">
         <Grid.RowDefinitions>
             <RowDefinition Height="Auto"/>
             <RowDefinition Height="Auto"/>
@@ -125,4 +121,4 @@
             <Button Content="Save" Command="{Binding SaveCommand}" Style="{StaticResource YtButton}" MinWidth="110"/>
         </StackPanel>
     </Grid>
-</Window>
+</UserControl>