Social bar (Branch B): global resource with per-scene presence — Models/Socials.cs (19 services, icons, canonical URLs), Services/SocialValidator.cs (HTTP lookup validation seam), LayoutStore schema v7 (Socials + SocialEntry tables + Scene.HasSocialBar), MainViewModel (socials collection, AddSocial/RemoveSocial/ToggleSceneSocialBar commands, freemium cap YT+1, premium seam), MainWindow.xaml (footer Social button + [+/-] toggle on meter line, preview bar rendering top/bottom + LCR), 4 integration tests (roundtrip, empty-not-persisted, canonical URLs, icons), 85 tests passing, 0 warnings

Models/index.md

@@ -14,6 +14,7 @@ Plain data types. No logic beyond what a property can carry. See
 | `QualityOption.cs` | Resolution tier record `(Display, Fps, Bitrate, Width, Height)`; `Label` formats as `1080p60 (8Mbps)` — drives the bottom-bar dropdown and the output-rect math |
 | `StreamConfig.cs` | `StreamConfig` (note: `TargetBitrate`/`Resolution` defaults are stale — not yet wired to the dropdown), `StreamHealth` (bitrate/FPS/dropped/duration), `StreamStatus` enum |
 | `YouTube.cs` | `YouTubeChannel` and `ChatMessage` (chat feed) |
+| `Socials.cs` | **Social bar** (global resource, per-scene presence): `SocialService` enum (YouTube/Twitch/X/Instagram/TikTok/Facebook/Discord/Kick/Threads/Bluesky/GitHub/LinkedIn/Pinterest/Snapchat/Reddit/WhatsApp/Telegram/Link/Website), `SocialEntry` (Service/Handle/ProfileUrl + Initials/AccentColor), `SocialsConfig` (Entries + BarPosition Top/Bottom + BarJustify LCR), `SocialServiceIcons` (canonical URL builder + initials/color per service) |
 
 Related: [`ViewModels/index.md`](../ViewModels/index.md) consume these;
 [`Services/LayoutStore.cs`](../Services/LayoutStore.cs) persists `Scene`/`Source`.