TASK 51 slice 3: per-scene webcam BackgroundEffect + BackgroundStrength on WebcamSceneConfig, persisted via additive guarded columns; radio-pill bools RemoveBackground/BlurBackground (Unit: bg-effect config)

Models/WebcamSceneConfig.cs

@@ -15,4 +15,42 @@ public class WebcamSceneConfig : SceneElement
     public override bool IsDraggable => true;
     public override ElementKind Kind => ElementKind.Dynamic;
     public override ImageSource? DisplaySource => VideoImageSource;
+
+    private BackgroundEffect _backgroundEffect = BackgroundEffect.None;
+    /// <summary>TASK 51: this scene's background effect for the webcam (persisted).</summary>
+    public BackgroundEffect BackgroundEffect
+    {
+        get => _backgroundEffect;
+        set
+        {
+            if (!Set(ref _backgroundEffect, value)) return;
+            Raise(nameof(RemoveBackground));
+            Raise(nameof(BlurBackground));
+        }
+    }
+
+    private double _backgroundStrength = 0.5;
+    /// <summary>TASK 51: 0..1 — Blur amount, or Remove's edge softness (persisted).</summary>
+    public double BackgroundStrength
+    {
+        get => _backgroundStrength;
+        set => Set(ref _backgroundStrength, Math.Clamp(value, 0, 1));
+    }
+
+    /// <summary>Pill-switch surface: Remove and Blur behave like radio buttons — turning one
+    /// on turns the other off; turning the active one off means <see cref="BackgroundEffect.None"/>.</summary>
+    public bool RemoveBackground
+    {
+        get => BackgroundEffect == BackgroundEffect.Remove;
+        set => BackgroundEffect = value ? BackgroundEffect.Remove
+            : BackgroundEffect == BackgroundEffect.Remove ? BackgroundEffect.None : BackgroundEffect;
+    }
+
+    /// <inheritdoc cref="RemoveBackground"/>
+    public bool BlurBackground
+    {
+        get => BackgroundEffect == BackgroundEffect.Blur;
+        set => BackgroundEffect = value ? BackgroundEffect.Blur
+            : BackgroundEffect == BackgroundEffect.Blur ? BackgroundEffect.None : BackgroundEffect;
+    }
 }

Models/index.md

@@ -11,8 +11,8 @@ Plain data types. No logic beyond what a property can carry. See
 | `SceneElement.cs` | Base for anything placeable in a scene: shared layout/clip/mirror/border surface, `virtual IsWebcam`/`virtual IsImageSource`/`virtual IsZoomLayer` (TASK 52); `ToggleClipShape` + persisted `RectWidth`/`RectHeight` (pre-Round rect so round→rect restores after reload) |
 | `ZoomSceneElement.cs` | **Transient zoom box (TASK 52, creator-corrected 2026-10-08):** carries the box rect AND the anchored `CaptureX`/`CaptureY` (the fixed box/2 capture window set on `ActivateZoom`; moving the box never touches it). `IsZoomActive` flips `Kind` Static→Dynamic (leaves the baked base while active); never persisted (LayoutStore save skips non-Source/non-WebcamSceneConfig rows), never shown in the layers list or the element template (`IsZoomLayer` gates both). The compositor SKIPS the active element in every layer loop and draws its 2x content LAST (layer n+1) via `ZoomMagnifier`. |
 | `Webcam.cs` | Singleton webcam identity: `Id`, `DeviceId`, `Name` (one row app-wide) |
-| `BackgroundEffect.cs` | **TASK 51:** per-webcam background effect enum `None` / `Remove` / `Blur` (not yet on `WebcamSceneConfig` — config + persistence is slice 3) |
-| `WebcamSceneConfig.cs` | Per-scene webcam placement (subclass of `SceneElement`): geometry + `IsVisible` + border (`BorderColor`/`BorderOpacity`/`BorderWidth`/`BorderAnimation`) + `VideoImageSource`; `WebcamId` links to `Webcam` |
+| `BackgroundEffect.cs` | **TASK 51:** per-webcam background effect enum `None` / `Remove` / `Blur`, carried by `WebcamSceneConfig` |
+| `WebcamSceneConfig.cs` | Per-scene webcam placement (subclass of `SceneElement`): geometry + `IsVisible` + border (`BorderColor`/`BorderOpacity`/`BorderWidth`/`BorderAnimation`) + `VideoImageSource`; `WebcamId` links to `Webcam`; **TASK 51:** `BackgroundEffect` + `BackgroundStrength` (0..1, default 0.5) + the radio-pill surface `RemoveBackground`/`BlurBackground` (one on turns the other off; both off = None) |
 | `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 |
 | `MicStatus.cs` | Footer mic indicator: `NotConnected` / `Connected` / `Problem` — the state behind the MIC button's status dot (red = no device/capture off, green = capturing, yellow = a requested mic failed: in use/unplugged) |