refactor: extract recording-output concern into MainViewModel.Recording.cs — Commit F

The original premise (extract FFmpegEncoder / StreamHealthMonitor / FramePump
classes) was a no-op — those already exist as Services/Encoder/FfmpegEncoder.cs
and Services/Encoder/FramePump.cs. The honest functional seam was the local
recording-output concern, which was interleaved with live-stream orchestration:

- New MainViewModel.Recording.cs (121): StartRecordFile, FinalizeRecordingAsync,
  UniquePath, ChooseRecordFolder, ResetRecordFolder, DefaultRecordFolder + the
  recording fields (_recordFolder, RecordFolderDisplay, _activeRecordPath,
  _recordStartTime, _recordLength).
- MainViewModel.Streaming.Operations.cs 475 -> 377 (keeps live session lifecycle,
  health, visuals).
- MainViewModel.Streaming.cs 328 -> 323 (keeps pills/state/properties intact).

Same partial class — all MVVM bound-property glue untouched, no behavior change.
Build 0 warnings; 246 pass, only the 2 known failures.
Docs: ViewModels/index.md tracker updated in same commit.

HANDOFF.md

@@ -2,45 +2,50 @@
 
 ## Branch / Commit State
 
-**`main`**, working tree is **CLEAN**.
+**`main`**, working tree is **CLEAN**. `origin/main` == `1f4624c` (pushed).
 
-Both split phases are now complete. Phase 1 (view-model partials) is pushed;
+**Pushed** (reached `origin/main` == `1f4624c`, incl. tags): Phase 1 commit `0`
-Phase 2 (MainWindow.xaml → UserControls) is complete but **local-only**.
++ refactor commits `1..11`, **and Phase 2 commits `12..18`** (they were pushed
+at the Phase-2 milestone; the old "Phase 2 local-only" claim below was written
+before that push and is stale).
 
-**Pushed** (reached `origin/main` == `14d3ed4`, incl. tags): Phase 1 commit `0`
+**LOCAL ONLY (Phase 3 — A, B, C, D, E) + the Controls doc commit** — policy
-and refactor commits `1..11` (`refactor-commit-0..11`), plus policy/HANDOFF.
+2026-08-30: no per-commit push; `git push` only at a user-agreed milestone /
+"push it". **Push pending on explicit user approval:**
 
-**LOCAL ONLY (Phase 2 — 12, 13, 14, 15, 16, 17, 18)** — policy 2026-08-30: no
+| Commit | Hash | Tag | Payload |
-per-commit push; `git push` only at a user-agreed milestone / "push it".
+|--------|------|-----|---------|
-**Push pending on explicit user approval:**
+| docs | `cb54637` | — | `Controls/index.md` (missing per-directory map) |
-
+| A | `6944db8` | `refactor-commit-A` | split `MainViewModel.cs` core → **495** |
-| Commit | Hash | Tag | Control | From Loc |
+| B | `31362d1` | `refactor-commit-B` | split `MainViewModel.Streaming.cs` → **330** |
-|--------|------|-----|---------|----------|
+| C | `fab2e09` | `refactor-commit-C` | split `MainViewModel.Background.cs` → **418** |
-| 12 | `bc23b64` | `refactor-commit-12` | `Controls/BottomBar` | footer |
+| D | `d3271a0` | `refactor-commit-D` | trim `SocialsDialogViewModel.cs` → **334** |
-| 13 | `6914252` | `refactor-commit-13` | `Controls/HealthBanner` | row 1 banner |
+| E | `dcb3637` | `refactor-commit-E` | split `LayoutStore.cs` → 6 partials, **≤495** |
-| 14 | `90f5ad5` | `refactor-commit-14` | `Controls/TopBar` | row 0 top bar |
-| 15 | `c5e3466` | `refactor-commit-15` | `Controls/PreviewPane` | center preview |
-| 16 | `73397cf` | `refactor-commit-16` | `Controls/SceneThumbnailStrip` | row 0 strip |
-| 17 | `c9fd1bd` | `refactor-commit-17` | `Controls/LeftPanel` | row 1 col 0 |
-| 18 | `544208e` | `refactor-commit-18` | `Controls/OverlayHost` | overlay dialogs |
 
 ## What's In Flight
 
-Nothing code-in-flight — working tree clean, **Phase 2 complete**.
+Nothing code-in-flight — working tree clean, **Phase 3 complete**.
 
-**Phase 2 result:** `MainWindow.xaml` carved 1,681 → **123 lines** (a shell over
+**Phase 3 result:** every production `.cs` is now **≤ 500 lines** (checked via
-6 UserControls under `Controls/`, namespace `ytLive.Controls`). Every change:
+`git ls-files '*.cs'` minus tests; nothing exceeds 500). The 500-line count is a
-0-warning build, `scripts/verify.sh` (246 pass + 2 known only), explicit-file
+**hard ceiling, not the goal** — each file was split **grouped by functionality**
-`scripts/scope-check.sh`, `ViewModels/index.md` in the SAME commit, tagged
+so an AI can process one concern per file. Splits were **concern-driven**:
-`refactor-commit-N`, no per-commit push.
+- `MainViewModel` → `.Sources.cs`/`.Web.cs`, `Streaming.cs` + `Streaming.Operations.cs`,
+  `Background.cs` + `Background.Model.cs`; `SocialSlotViewModel.cs` (row VM).
+- `LayoutStore` (was 1402) → `Migrations.cs`/`Load.cs`/`Save.cs`/`Settings.cs`/
+  `Assets.cs` + a 47-line shell; `public partial class LayoutStore : IDisposable`.
+
+Every change: 0-warning build, `scripts/verify.sh` (246 pass + 2 known only),
+explicit-file `scripts/scope-check.sh`, `ViewModels/index.md` tracker in the
+SAME commit, tagged `refactor-commit-N`, no per-commit push.
 
 **Next:** 
-- If user says "push": `git push origin main && git push --tags` (7 commits 12-18
+- If user says "push": `git push origin main && git push --tags` (6 commits:
-  + their tags).
+  `cb54637` + A–E, and tags `refactor-commit-A..E`).
-- Then optional Phase 3 if queued. Nothing is queued beyond Phase 2.
 
-**Pending bus:** `ViewModels/index.md` Phase 2 tracker has rows 12–18 (closed);
+**Pending bus:** `ViewModels/index.md` Phase 3 tracker has rows A–E (closed);
-Phase 1 tracker closed. `Controls/` has `index.md`-style facts only if needed.
+Phase 3 marked COMPLETE. Watch-list (under limit, no action): `Controls/PreviewPane.xaml.cs`
+(464), `ViewModels/MainViewModel.Audio.cs` (408).
 
 ## Landmines
 
@@ -69,31 +74,29 @@ Phase 1 tracker closed. `Controls/` has `index.md`-style facts only if needed.
 ## Todo state
 
 - MainViewModel refactor: **Phase 1 complete (11/11 partials)**, pushed.
-- MainWindow.xaml refactor: **Phase 2 complete (6/6 controls)**, local-only.
+- MainWindow.xaml refactor: **Phase 2 complete (6/6 controls)**, pushed at `1f4624c`.
+- 500-line compliance: **Phase 3 complete (all 5 offenders ≤ 500)**, local-only A–E.
 - TASK 3: 27/30 (preview compositor 16, text source 17, alerts 20 still open).
 - TASK 4: ✅ shipped. TASK 9: items 1–3 shipped; 4–7 open. TASK 10: steps 1–7; Velopack pending.
 - TASK 18: shipped, creator verification pending. TASK 19/23, 20, 21-A: shipped.
 - TASK 22 (audio sync offset): not started — required for v1.
 
-## Session summary (2026-08-30)
+## Session summary (2026-08-31)
 
-- Ran the **MainWindow.xaml split to completion** under the standing "continue
+- Ran the **500-line Phase 3 split to completion** under the standing "continue
   without stopping" directive — no interruption prompts, no `question` tool.
-- Commits 12–18 landed locally, each: cut → 0-warning build → verify (246 pass +
+- Commits A–E landed locally, each: cut → 0-warning build → verify (246 pass + 2
-  2 known) → scope-check → index.md in-commit → `git tag refactor-commit-N`. No push.
+  known) → scope-check → index.md in-commit → `git tag refactor-commit-{A..E}`.
-- **Commit 15 (PreviewPane** the hardest: 1920×1080 canvas + drag/select/resize/
+- **Re-structuring principle (user correction, 2026-08-31):** split by
-  hit-test, webcam menu handlers, social glow, audio meters. A dropped outer
+  **functionality**, so an AI can process one concern per file; the 500-line
-  `Border` (background/glow/margin) was caught and restored same-commit.
+  count is a **ceiling**, NOT the target. Do not pad or reshape code to a
-- **Commit 17 (LeftPanel)** the biggest: property editors + chat autoscroll
+  number — group by concern and only split enough to stay under the ceiling.
-  (moved to self-subscribe on `Loaded`), drag-to-reorder, snapshot revert/accept
+- **Commit E (LayoutStore)** the biggest: 1402 → 6 concern-based partials
-  family; window routes via `_leftPanel.IsClickInside` and
+  (Migrations/Load/Save/Settings/Assets/shell), default partial split.
-  `_leftPanel.OnSelectionChanged(vm)`.
+- **Accident caught & recovered (Commit D):** a `> ViewModels/SocialsDialogViewModel.cs`
-- **Commit 18 (OverlayHost)** the scope-decision: moved only the three dialogs;
+  write that read from the file it was simultaneously truncating left the file at
-  kept `WebViewHostPanel` + `ToastArea` as window-root stubs because their
+  1 line. Fixed IMMEDIATELY via `git checkout --` and re-ran the split. **Lesson**
-  name-based lookups (WebView2 init, toast `InArea`) would break if buried in a
+  (goes in `MyMistakes.md`): never `awk … > SRC` where `awk` also reads `SRC`;
-  control — a spin-guard decision, not a guess.
+  stage every multi-block cut into temp files first, then assemble. All later
-- Two XAML extraction gotchas recorded: (a) a moved block losing its `xmlns`
+  LayoutStore cuts did exactly that (read original once into temp files).
-  → MC2000 "key null" (Line n col m), fixed by adding `xmlns:models` on the
+- Push checkpoint reached; awaiting explicit "push" for `cb54637` + A–E + tags.
-  control root; (b) re-deriving line numbers after each edit before `sed`/awk
-  deletion ranges (the edit tool shifts numbers).
-- Push checkpoint reached; awaiting explicit "push" for commits 12–18 + tags.

MyMistakes.md

@@ -44,3 +44,26 @@ packages, high-quality downscale via `TransformedBitmap`. Screenshots compress
 4. Point `README.md` at the `.jpg` (not `.png`).
 
 **Result:** 3.2MB screenshot → 1400×794 → **188KB** `ytLlive-preview.jpg` in `docs/`.
+
+---
+
+## Splitting a large file into partials — NEVER `awk … > SRC` while awking SRC
+
+(2026-08-31, Commit D) Tried to split `SocialsDialogViewModel.cs` in one line:
+`{ awk '…' SRC; echo ""; awk '…2…' SRC; } > SRC`. The **first write truncated
+SRC to 1 line**, so the second `awk` read the already-truncated file → the whole
+source was lost (1 line left). Recovered with `git checkout -- SRC`, then redid
+it, but the same bug could have meant making it up from scratch.
+
+**Rule:** when a cut needs N blocks from one source into N files, never write a
+block back onto the source that the `awk`s still read. Instead:
+1. Read the source **once** at the start into temp files (`mktemp -d`, one file
+   per block), with a `$D` variable you carry forward.
+2. Verify block sizes (`wc -l`) and brace balance (`python3 -c` counting `{`/`}`)
+   before touching any real file.
+3. Then assemble each new file from `cat D/block …` — never truncating the source
+   until every read is done.
+
+`git status` can't save you here if you don't notice until the file is gone —
+`git checkout -- <path>` from the last commit is the recovery. Cheap insurance:
+restore-then-retry, do it atomically from temp files the first time.

Services/LayoutStore.Assets.cs

@@ -0,0 +1,41 @@
+using System.Security.Cryptography;
+using Microsoft.Data.Sqlite;
+
+namespace ytLive.Services;
+
+public partial class LayoutStore : IDisposable
+{
+    public byte[]? GetAssetBytes(string assetId)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Data FROM Asset WHERE Id = $id";
+        cmd.Parameters.AddWithValue("$id", assetId);
+        return cmd.ExecuteScalar() as byte[];
+    }
+
+    public string UpsertAsset(byte[] data, int pixelWidth, int pixelHeight)
+    {
+        var hash = Convert.ToHexString(SHA256.HashData(data));
+        var id = Guid.NewGuid().ToString();
+
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = """
+            INSERT INTO Asset (Id, Hash, Data, PixelWidth, PixelHeight)
+            VALUES ($id, $hash, $data, $w, $h)
+            ON CONFLICT(Hash) DO NOTHING;
+            """;
+        cmd.Parameters.AddWithValue("$id", id);
+        cmd.Parameters.AddWithValue("$hash", hash);
+        cmd.Parameters.AddWithValue("$data", data);
+        cmd.Parameters.AddWithValue("$w", pixelWidth);
+        cmd.Parameters.AddWithValue("$h", pixelHeight);
+        cmd.ExecuteNonQuery();
+
+        cmd.CommandText = "SELECT Id FROM Asset WHERE Hash = $hash;";
+        return (string)cmd.ExecuteScalar()!;
+    }
+
+    // ─── License (TASK 10 — Polar billing) ───
+
+    /// <summary>The saved license key, or null if never entered.</summary>
+}

Services/LayoutStore.Load.cs

@@ -0,0 +1,221 @@
+using Microsoft.Data.Sqlite;
+using ytLive.Models;
+
+namespace ytLive.Services;
+
+public partial class LayoutStore : IDisposable
+{
+    public List<Scene> Load()
+    {
+        Webcam = null;
+        Socials = null;
+        Music = null;
+        var scenes = new List<Scene>();
+        var sourcesByScene = new Dictionary<string, List<Source>>();
+        var configsByScene = new Dictionary<string, List<WebcamSceneConfig>>();
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "SELECT Id, Name, IsHidden, IsChatScene, HasBackground, HasSocialBar FROM Scene ORDER BY SortOrder";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+            {
+                scenes.Add(new Scene
+                {
+                    Id = reader.GetString(0),
+                    Name = reader.GetString(1),
+                    IsHidden = reader.GetInt32(2) != 0,
+                    IsChatScene = reader.GetInt32(3) != 0,
+                    HasBackground = reader.GetInt32(4) != 0,
+                    HasSocialBar = reader.FieldCount > 5 && !reader.IsDBNull(5) && reader.GetInt32(5) != 0,
+                });
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "SELECT Id, DeviceId, Name FROM Webcam;";
+            using var reader = cmd.ExecuteReader();
+            if (reader.Read())
+            {
+                Webcam = new Webcam
+                {
+                    Id = reader.GetString(0),
+                    DeviceId = reader.GetString(1),
+                    Name = reader.GetString(2),
+                };
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "SELECT Id, BarPosition, BarEnabled FROM Socials LIMIT 1;";
+            using var reader = cmd.ExecuteReader();
+            if (reader.Read())
+            {
+                Socials = new SocialsConfig
+                {
+                    BarPosition = Enum.TryParse<SocialBarPosition>(reader.GetString(1), out var pos) ? pos : SocialBarPosition.Bottom,
+                    BarEnabled = reader.FieldCount > 2 && !reader.IsDBNull(2) && reader.GetInt32(2) != 0,
+                };
+                var socialsId = reader.GetString(0);
+
+                using var entryCmd = _connection.CreateCommand();
+                entryCmd.CommandText = "SELECT Service, Handle, ProfileUrl, Software FROM SocialEntry WHERE SocialsId = $id ORDER BY SortOrder;";
+                entryCmd.Parameters.AddWithValue("$id", socialsId);
+                using var entryReader = entryCmd.ExecuteReader();
+                while (entryReader.Read())
+                {
+                    Socials.Entries.Add(new SocialEntry
+                    {
+                        Service = Enum.TryParse<SocialService>(entryReader.GetString(0), out var svc) ? svc : SocialService.Link,
+                        Handle = entryReader.GetString(1),
+                        ProfileUrl = entryReader.GetString(2),
+                        FediverseSoftware = entryReader.FieldCount > 3 && !entryReader.IsDBNull(3) ? entryReader.GetString(3) : null,
+                    });
+                }
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "SELECT TrackPath, IsEnabled FROM Music LIMIT 1;";
+            using var reader = cmd.ExecuteReader();
+            if (reader.Read())
+            {
+                Music = new Music
+                {
+                    TrackPath = reader.GetString(0),
+                    IsEnabled = reader.GetInt32(1) != 0,
+                };
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = """
+                SELECT Id, SceneId, AssetId, Type, Name, IsEnabled,
+                       X, Y, Width, Height, Opacity, MonitorIndex, ClipShape, IsMirrored,
+                       IsBackground, CaptureKey, ShowDesktop,
+                       ChatFontSize, ChatFontColor, ChatBackgroundColor, ChatMaxMessages,
+                       ChatShowTimestamps, ChatShowBadges, ChatMemberColor, ChatSuperChatColor,
+                       WebUri, MediaPath, MediaIsLooping, MediaVolume, MediaPlaybackState
+                FROM Source ORDER BY SortOrder
+                """;
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+            {
+                var sceneId = reader.GetString(1);
+                var type = Enum.Parse<SourceType>(reader.GetString(3));
+                var source = new Source
+                {
+                    Id = reader.GetString(0),
+                    AssetId = reader.IsDBNull(2) ? null : reader.GetString(2),
+                    Type = type,
+                    Name = reader.GetString(4),
+                    IsEnabled = reader.GetInt32(5) != 0,
+                    X = reader.GetDouble(6),
+                    Y = reader.GetDouble(7),
+                    Width = reader.GetDouble(8),
+                    Height = reader.GetDouble(9),
+                    Opacity = reader.GetDouble(10),
+                    MonitorIndex = reader.IsDBNull(11) ? null : reader.GetInt32(11),
+                    ClipShape = Enum.TryParse<ClipShape>(reader.GetString(12), out var clip) ? clip : ClipShape.Traditional,
+                    IsMirrored = reader.GetInt32(13) != 0,
+                    // Rows saved before the Type setter derived the flag carry
+                    // IsBackground=0; derive from Type, keeping the persisted bit
+                    // for legacy DisplayCapture backdrops.
+                    IsBackground = type == SourceType.Background || reader.GetInt32(14) != 0,
+                    CaptureKey = reader.IsDBNull(15) ? null : reader.GetString(15),
+                    ShowDesktop = reader.GetInt32(16) != 0,
+                    ChatFontSize = reader.IsDBNull(17) ? 16 : reader.GetDouble(17),
+                    ChatFontColor = reader.IsDBNull(18) ? "#FFFFFF" : reader.GetString(18),
+                    ChatBackgroundColor = reader.IsDBNull(19) ? "#80000000" : reader.GetString(19),
+                    ChatMaxMessages = reader.IsDBNull(20) ? 5 : reader.GetInt32(20),
+                    ChatShowTimestamps = reader.IsDBNull(21) ? true : reader.GetInt32(21) != 0,
+                    ChatShowBadges = reader.IsDBNull(22) ? true : reader.GetInt32(22) != 0,
+                    ChatMemberColor = reader.IsDBNull(23) ? "#e94560" : reader.GetString(23),
+                    ChatSuperChatColor = reader.IsDBNull(24) ? "#eab308" : reader.GetString(24),
+                    WebUri = reader.IsDBNull(25) ? null : reader.GetString(25),
+                    MediaPath = reader.IsDBNull(26) ? null : reader.GetString(26),
+                    MediaIsLooping = reader.IsDBNull(27) ? false : reader.GetInt32(27) != 0,
+                    MediaVolume = reader.IsDBNull(28) ? 1.0 : reader.GetDouble(28),
+                    MediaPlaybackState = reader.IsDBNull(29)
+                        ? MediaPlaybackState.Stopped
+                        : Enum.TryParse<MediaPlaybackState>(reader.GetString(29), out var ps)
+                            ? ps
+                            : MediaPlaybackState.Stopped,
+                };
+                if (!sourcesByScene.TryGetValue(sceneId, out var list))
+                    sourcesByScene[sceneId] = list = new List<Source>();
+                list.Add(source);
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = """
+                SELECT SceneId, WebcamId, IsVisible, X, Y, Width, Height, Opacity,
+                       ClipShape, IsMirrored, BorderColor, BorderOpacity, BorderWidth, BorderAnimation,
+                       RectWidth, RectHeight
+                FROM WebcamSceneConfig ORDER BY SortOrder
+                """;
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+            {
+                var sceneId = reader.GetString(0);
+                var config = new WebcamSceneConfig
+                {
+                    WebcamId = reader.GetString(1),
+                    Name = Webcam?.Name ?? "Webcam",
+                    IsVisible = reader.GetInt32(2) != 0,
+                    X = reader.GetDouble(3),
+                    Y = reader.GetDouble(4),
+                    Width = reader.GetDouble(5),
+                    Height = reader.GetDouble(6),
+                    Opacity = reader.GetDouble(7),
+                    ClipShape = Enum.TryParse<ClipShape>(reader.GetString(8), out var clip) ? clip : ClipShape.Traditional,
+                    IsMirrored = reader.GetInt32(9) != 0,
+                    BorderColor = reader.IsDBNull(10) ? string.Empty : reader.GetString(10),
+                    BorderOpacity = reader.IsDBNull(11) ? 1.0 : reader.GetDouble(11),
+                    BorderWidth = reader.IsDBNull(12) ? 0 : reader.GetInt32(12),
+                    BorderAnimation = Enum.TryParse<BorderAnimation>(reader.GetString(13), out var anim) ? anim : BorderAnimation.None,
+                    RectWidth = reader.IsDBNull(14) ? null : reader.GetDouble(14),
+                    RectHeight = reader.IsDBNull(15) ? null : reader.GetDouble(15),
+                };
+                if (!configsByScene.TryGetValue(sceneId, out var list))
+                    configsByScene[sceneId] = list = new List<WebcamSceneConfig>();
+                list.Add(config);
+            }
+        }
+
+        foreach (var scene in scenes)
+        {
+            if (sourcesByScene.TryGetValue(scene.Id, out var sources))
+                foreach (var source in sources)
+                    scene.Elements.Add(source);
+            if (configsByScene.TryGetValue(scene.Id, out var configs))
+                foreach (var config in configs)
+                    scene.Elements.Add(config);
+
+            var bg = scene.Elements.OfType<Source>().FirstOrDefault(s => s.IsBackground);
+            if (bg != null)
+            {
+                // Load from source-keyed settings (new) or scene-keyed (legacy migration)
+                var path = GetSetting($"BackgroundPath_{bg.Id}");
+                if (string.IsNullOrWhiteSpace(path))
+                    path = GetSetting($"BackgroundPath_{scene.Id}");
+                if (!string.IsNullOrWhiteSpace(path))
+                    bg.CustomBackgroundPath = path;
+
+                var useDefault = GetSetting($"BackgroundUseDefault_{bg.Id}");
+                if (string.IsNullOrWhiteSpace(useDefault))
+                    useDefault = GetSetting($"BackgroundUseDefault_{scene.Id}");
+                if (useDefault == "0")
+                    bg.UseDefaultBackground = false;
+            }
+        }
+
+        return scenes;
+    }
+}

Services/LayoutStore.Migrations.cs

@@ -0,0 +1,495 @@
+using Microsoft.Data.Sqlite;
+using ytLive.Models;
+
+namespace ytLive.Services;
+
+public partial class LayoutStore : IDisposable
+{
+    private void EnsureSchema()
+    {
+        string[] statements =
+        {
+            """
+            CREATE TABLE IF NOT EXISTS Scene (
+                Id TEXT PRIMARY KEY,
+                Name TEXT NOT NULL,
+                IsHidden INTEGER NOT NULL DEFAULT 0,
+                IsChatScene INTEGER NOT NULL DEFAULT 0,
+                HasBackground INTEGER NOT NULL DEFAULT 1,
+                SortOrder INTEGER NOT NULL DEFAULT 0
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Asset (
+                Id TEXT PRIMARY KEY,
+                Hash TEXT NOT NULL UNIQUE,
+                Data BLOB NOT NULL,
+                PixelWidth INTEGER NOT NULL DEFAULT 0,
+                PixelHeight INTEGER NOT NULL DEFAULT 0
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Source (
+                Id TEXT PRIMARY KEY,
+                SceneId TEXT NOT NULL REFERENCES Scene(Id) ON DELETE CASCADE,
+                AssetId TEXT REFERENCES Asset(Id),
+                Type TEXT NOT NULL,
+                Name TEXT NOT NULL,
+                IsEnabled INTEGER NOT NULL DEFAULT 1,
+                X REAL NOT NULL DEFAULT 0,
+                Y REAL NOT NULL DEFAULT 0,
+                Width REAL NOT NULL DEFAULT 0,
+                Height REAL NOT NULL DEFAULT 0,
+                Opacity REAL NOT NULL DEFAULT 1,
+                MonitorIndex INTEGER,
+                DeviceId TEXT,
+                ClipShape TEXT NOT NULL DEFAULT 'Traditional',
+                IsMirrored INTEGER NOT NULL DEFAULT 0,
+                IsBackground INTEGER NOT NULL DEFAULT 0,
+                CaptureKey TEXT,
+                SortOrder INTEGER NOT NULL DEFAULT 0
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Webcam (
+                Id TEXT PRIMARY KEY,
+                DeviceId TEXT NOT NULL UNIQUE,
+                Name TEXT NOT NULL
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS WebcamSceneConfig (
+                SceneId TEXT NOT NULL REFERENCES Scene(Id) ON DELETE CASCADE,
+                WebcamId TEXT NOT NULL REFERENCES Webcam(Id) ON DELETE CASCADE,
+                IsVisible INTEGER NOT NULL DEFAULT 1,
+                X REAL NOT NULL DEFAULT 0,
+                Y REAL NOT NULL DEFAULT 0,
+                Width REAL NOT NULL DEFAULT 0,
+                Height REAL NOT NULL DEFAULT 0,
+                Opacity REAL NOT NULL DEFAULT 1,
+                ClipShape TEXT NOT NULL DEFAULT 'Traditional',
+                IsMirrored INTEGER NOT NULL DEFAULT 0,
+                RectWidth REAL,
+                RectHeight REAL,
+                BorderColor TEXT,
+                BorderOpacity REAL NOT NULL DEFAULT 1,
+                BorderWidth INTEGER NOT NULL DEFAULT 0,
+                BorderAnimation TEXT NOT NULL DEFAULT 'None',
+                SortOrder INTEGER NOT NULL DEFAULT 0,
+                PRIMARY KEY (SceneId, WebcamId)
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Socials (
+                Id TEXT PRIMARY KEY,
+                BarPosition TEXT NOT NULL DEFAULT 'Bottom',
+                BarJustify TEXT NOT NULL DEFAULT 'Center'
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS SocialEntry (
+                Id TEXT PRIMARY KEY,
+                SocialsId TEXT NOT NULL REFERENCES Socials(Id) ON DELETE CASCADE,
+                Service TEXT NOT NULL,
+                Handle TEXT NOT NULL,
+                ProfileUrl TEXT NOT NULL,
+                SortOrder INTEGER NOT NULL DEFAULT 0
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Music (
+                Id TEXT PRIMARY KEY,
+                TrackPath TEXT NOT NULL,
+                IsEnabled INTEGER NOT NULL DEFAULT 0
+            );
+            """,
+            """
+            CREATE TABLE IF NOT EXISTS Settings (
+                Key TEXT PRIMARY KEY,
+                Value TEXT NOT NULL
+            );
+            """,
+        };
+        foreach (var sql in statements)
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = sql;
+            cmd.ExecuteNonQuery();
+        }
+        MigrateSourceTable();
+        MigrateWebcamConfigTable();
+        MigrateSceneTable();
+        MigrateSceneSocialBarColumn();
+        MigrateSocialsTable();
+        MigrateSocialEntryTable();
+        if (GetUserVersion() < 3)
+            MigrateToV3();
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA user_version = 9;";
+            cmd.ExecuteNonQuery();
+        }
+    }
+
+
+    // v1 → v2: Source gains ClipShape + IsMirrored (webcam clip/mirror prefs).
+    // CREATE TABLE IF NOT EXISTS doesn't touch existing tables, so pre-v2 DBs
+    // get the columns here instead.
+    private void MigrateSourceTable()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(Source);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (!columns.Contains("ClipShape"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ClipShape TEXT NOT NULL DEFAULT 'Traditional';";
+            cmd.ExecuteNonQuery();
+        }
+
+        if (!columns.Contains("IsMirrored"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN IsMirrored INTEGER NOT NULL DEFAULT 0;";
+            cmd.ExecuteNonQuery();
+        }
+
+        if (columns.Contains("IsBackdrop"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source RENAME COLUMN IsBackdrop TO IsBackground;";
+            cmd.ExecuteNonQuery();
+        }
+        else if (!columns.Contains("IsBackground"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN IsBackground INTEGER NOT NULL DEFAULT 0;";
+            cmd.ExecuteNonQuery();
+        }
+
+        if (!columns.Contains("CaptureKey"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN CaptureKey TEXT;";
+            cmd.ExecuteNonQuery();
+        }
+
+        // TASK 3.18: ChatBox overlay source
+        if (!columns.Contains("ChatFontSize"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatFontSize REAL NOT NULL DEFAULT 16;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatFontColor"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatFontColor TEXT NOT NULL DEFAULT '#FFFFFF';";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatBackgroundColor"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatBackgroundColor TEXT NOT NULL DEFAULT '#80000000';";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatMaxMessages"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatMaxMessages INTEGER NOT NULL DEFAULT 5;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatShowTimestamps"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatShowTimestamps INTEGER NOT NULL DEFAULT 1;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatShowBadges"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatShowBadges INTEGER NOT NULL DEFAULT 1;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatMemberColor"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatMemberColor TEXT NOT NULL DEFAULT '#e94560';";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ChatSuperChatColor"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ChatSuperChatColor TEXT NOT NULL DEFAULT '#eab308';";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("ShowDesktop"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN ShowDesktop INTEGER NOT NULL DEFAULT 0;";
+            cmd.ExecuteNonQuery();
+        }
+
+        if (!columns.Contains("WebUri"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN WebUri TEXT;";
+            cmd.ExecuteNonQuery();
+        }
+
+        // TASK 21: Media source (video/audio file playback)
+        if (!columns.Contains("MediaPath"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN MediaPath TEXT;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("MediaIsLooping"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN MediaIsLooping INTEGER NOT NULL DEFAULT 0;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("MediaVolume"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN MediaVolume REAL NOT NULL DEFAULT 1;";
+            cmd.ExecuteNonQuery();
+        }
+        if (!columns.Contains("MediaPlaybackState"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Source ADD COLUMN MediaPlaybackState TEXT NOT NULL DEFAULT 'Stopped';";
+            cmd.ExecuteNonQuery();
+        }
+
+        // Rename legacy "Backdrop" display name to "Background" in existing rows
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "UPDATE Source SET Name = 'Background' WHERE Name = 'Backdrop';";
+            cmd.ExecuteNonQuery();
+        }
+    }
+
+    // v3 → v4: WebcamSceneConfig gains RectWidth/RectHeight (the pre-Round rect,
+    // so a reloaded Round webcam restores its aspect on toggle-back).
+    private void MigrateWebcamConfigTable()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(WebcamSceneConfig);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (!columns.Contains("RectWidth"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE WebcamSceneConfig ADD COLUMN RectWidth REAL;";
+            cmd.ExecuteNonQuery();
+        }
+
+        if (!columns.Contains("RectHeight"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE WebcamSceneConfig ADD COLUMN RectHeight REAL;";
+            cmd.ExecuteNonQuery();
+        }
+    }
+
+    // v2 → v3: the webcam leaves the Source table. Any webcam Source rows become
+    // one Webcam identity (first row — one camera app-wide) + a WebcamSceneConfig
+    // per scene that had one, then the webcam rows are deleted. No backfill:
+    // scenes without the webcam stay webcam-free.
+    private void MigrateToV3()
+    {
+        var rows = new List<(string Id, string SceneId, string Name, double X, double Y, double W, double H, double Opacity, string DeviceId, string ClipShape, bool IsMirrored)>();
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = """
+                SELECT Id, SceneId, Name, X, Y, Width, Height, Opacity, DeviceId, ClipShape, IsMirrored
+                FROM Source WHERE Type = 'Webcam' ORDER BY SortOrder;
+                """;
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+            {
+                rows.Add((
+                    reader.GetString(0),
+                    reader.GetString(1),
+                    reader.GetString(2),
+                    reader.GetDouble(3),
+                    reader.GetDouble(4),
+                    reader.GetDouble(5),
+                    reader.GetDouble(6),
+                    reader.GetDouble(7),
+                    reader.IsDBNull(8) ? string.Empty : reader.GetString(8),
+                    reader.GetString(9),
+                    reader.GetInt32(10) != 0));
+            }
+        }
+        if (rows.Count == 0) return;
+
+        using var tx = _connection.BeginTransaction();
+        var webcamId = Guid.NewGuid().ToString();
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "INSERT INTO Webcam (Id, DeviceId, Name) VALUES ($id, $device, $name);";
+            cmd.Transaction = tx;
+            cmd.Parameters.AddWithValue("$id", webcamId);
+            cmd.Parameters.AddWithValue("$device", rows[0].DeviceId);
+            cmd.Parameters.AddWithValue("$name", rows[0].Name);
+            cmd.ExecuteNonQuery();
+        }
+
+        foreach (var row in rows)
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = """
+                INSERT INTO WebcamSceneConfig
+                    (SceneId, WebcamId, IsVisible, X, Y, Width, Height, Opacity,
+                     ClipShape, IsMirrored, BorderColor, BorderOpacity, BorderWidth, BorderAnimation, SortOrder)
+                VALUES ($sceneId, $webcamId, 1, $x, $y, $w, $h, $opacity,
+                        $clip, $mirrored, NULL, 1, 0, 'None', 0);
+                """;
+            cmd.Transaction = tx;
+            cmd.Parameters.AddWithValue("$sceneId", row.SceneId);
+            cmd.Parameters.AddWithValue("$webcamId", webcamId);
+            cmd.Parameters.AddWithValue("$x", row.X);
+            cmd.Parameters.AddWithValue("$y", row.Y);
+            cmd.Parameters.AddWithValue("$w", row.W);
+            cmd.Parameters.AddWithValue("$h", row.H);
+            cmd.Parameters.AddWithValue("$opacity", row.Opacity);
+            cmd.Parameters.AddWithValue("$clip", row.ClipShape);
+            cmd.Parameters.AddWithValue("$mirrored", row.IsMirrored ? 1 : 0);
+            cmd.ExecuteNonQuery();
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Source WHERE Type = 'Webcam';";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        tx.Commit();
+    }
+
+    // v5 → v6: Scene gains HasBackground. Added columns default to true; the
+    // ONE-TIME backfill (runs only when the column is first added) turns every
+    // non-Live canonical scene off and drops their background sources — the fix for
+    // DBs saved before the Live-only policy. MainViewModel.NormalizeBackgrounds
+    // re-runs the same normalization on every load for DBs that miss the backfill.
+    private void MigrateSceneTable()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(Scene);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (columns.Contains("HasBackdrop"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Scene RENAME COLUMN HasBackdrop TO HasBackground;";
+            cmd.ExecuteNonQuery();
+        }
+        else if (columns.Contains("HasBackground"))
+        {
+            return;
+        }
+
+        if (!columns.Contains("HasBackground"))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "ALTER TABLE Scene ADD COLUMN HasBackground INTEGER NOT NULL DEFAULT 1;";
+            cmd.ExecuteNonQuery();
+        }
+
+        const string noBackground = "('starting', 'brb', 'chat', 'ending')";
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = $"UPDATE Scene SET HasBackground = 0 WHERE LOWER(TRIM(Name)) IN {noBackground};";
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = $"""
+                DELETE FROM Source
+                WHERE IsBackground = 1 AND SceneId IN
+                    (SELECT Id FROM Scene WHERE LOWER(TRIM(Name)) IN {noBackground});
+                """;
+            cmd.ExecuteNonQuery();
+        }
+    }
+
+    // v6 → v7: Scene gains HasSocialBar (the per-scene social-bar toggle).
+    // Defaults to 0 (off) — the creator adds it explicitly via the footer [+].
+    private void MigrateSceneSocialBarColumn()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(Scene);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (columns.Contains("HasSocialBar")) return;
+
+        using var alter = _connection.CreateCommand();
+        alter.CommandText = "ALTER TABLE Scene ADD COLUMN HasSocialBar INTEGER NOT NULL DEFAULT 0;";
+        alter.ExecuteNonQuery();
+    }
+
+    // v7 → v8: Socials gains BarEnabled (the dialog's show/hide switch). The old
+    // BarJustify column stays for back-compat but is no longer read or written.
+    private void MigrateSocialsTable()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(Socials);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (columns.Contains("BarEnabled")) return;
+
+        using var alter = _connection.CreateCommand();
+        alter.CommandText = "ALTER TABLE Socials ADD COLUMN BarEnabled INTEGER NOT NULL DEFAULT 1;";
+        alter.ExecuteNonQuery();
+    }
+
+    // v8 → v9: SocialEntry gains Software (the fediverse instance's nodeinfo
+    // software name) so a reloaded entry still shows the right service logo.
+    private void MigrateSocialEntryTable()
+    {
+        var columns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "PRAGMA table_info(SocialEntry);";
+            using var reader = cmd.ExecuteReader();
+            while (reader.Read())
+                columns.Add(reader.GetString(1));
+        }
+
+        if (columns.Contains("Software")) return;
+
+        using var alter = _connection.CreateCommand();
+        alter.CommandText = "ALTER TABLE SocialEntry ADD COLUMN Software TEXT;";
+        alter.ExecuteNonQuery();
+    }
+}

Services/LayoutStore.Save.cs

@@ -0,0 +1,339 @@
+using Microsoft.Data.Sqlite;
+using ytLive.Models;
+
+namespace ytLive.Services;
+
+public partial class LayoutStore : IDisposable
+{
+    public void Save(IEnumerable<Scene> scenes, Webcam? webcam, SocialsConfig? socials, Music? music = null)
+    {
+        using var tx = _connection.BeginTransaction();
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM WebcamSceneConfig;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Source;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Webcam;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM SocialEntry;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Socials;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Music;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Scene;";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = """
+                INSERT INTO Scene (Id, Name, IsHidden, IsChatScene, HasBackground, HasSocialBar, SortOrder)
+                VALUES ($id, $name, $isHidden, $isChat, $hasBackground, $hasSocialBar, $sort)
+                """;
+            cmd.Transaction = tx;
+            var idP = cmd.Parameters.Add("$id", SqliteType.Text);
+            var nameP = cmd.Parameters.Add("$name", SqliteType.Text);
+            var hiddenP = cmd.Parameters.Add("$isHidden", SqliteType.Integer);
+            var chatP = cmd.Parameters.Add("$isChat", SqliteType.Integer);
+            var backgroundP = cmd.Parameters.Add("$hasBackground", SqliteType.Integer);
+            var socialBarP = cmd.Parameters.Add("$hasSocialBar", SqliteType.Integer);
+            var sortP = cmd.Parameters.Add("$sort", SqliteType.Integer);
+
+            var sort = 0;
+            foreach (var scene in scenes)
+            {
+                idP.Value = scene.Id;
+                nameP.Value = scene.Name;
+                hiddenP.Value = scene.IsHidden ? 1 : 0;
+                chatP.Value = scene.IsChatScene ? 1 : 0;
+                backgroundP.Value = scene.HasBackground ? 1 : 0;
+                socialBarP.Value = scene.HasSocialBar ? 1 : 0;
+                sortP.Value = sort++;
+                cmd.ExecuteNonQuery();
+            }
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = """
+                INSERT INTO Source (Id, SceneId, AssetId, Type, Name, IsEnabled,
+                                    X, Y, Width, Height, Opacity, MonitorIndex,
+                                    ClipShape, IsMirrored, IsBackground, CaptureKey, ShowDesktop, SortOrder,
+                                    ChatFontSize, ChatFontColor, ChatBackgroundColor, ChatMaxMessages,
+                                    ChatShowTimestamps, ChatShowBadges, ChatMemberColor, ChatSuperChatColor,
+                                    WebUri, MediaPath, MediaIsLooping, MediaVolume, MediaPlaybackState)
+                VALUES ($id, $sceneId, $assetId, $type, $name, $isEnabled,
+                        $x, $y, $w, $h, $opacity, $monitor,
+                        $clip, $mirrored, $isBackground, $captureKey, $showDesktop, $sort,
+                        $chatFontSize, $chatFontColor, $chatBgColor, $chatMaxMsgs,
+                        $chatTimestamps, $chatBadges, $chatMemberColor, $chatSuperChatColor,
+                        $webUri, $mediaPath, $mediaIsLooping, $mediaVolume, $mediaPlaybackState)
+                """;
+            cmd.Transaction = tx;
+            var idP = cmd.Parameters.Add("$id", SqliteType.Text);
+            var sceneIdP = cmd.Parameters.Add("$sceneId", SqliteType.Text);
+            var assetIdP = cmd.Parameters.Add("$assetId", SqliteType.Text);
+            var typeP = cmd.Parameters.Add("$type", SqliteType.Text);
+            var nameP = cmd.Parameters.Add("$name", SqliteType.Text);
+            var enabledP = cmd.Parameters.Add("$isEnabled", SqliteType.Integer);
+            var xP = cmd.Parameters.Add("$x", SqliteType.Real);
+            var yP = cmd.Parameters.Add("$y", SqliteType.Real);
+            var wP = cmd.Parameters.Add("$w", SqliteType.Real);
+            var hP = cmd.Parameters.Add("$h", SqliteType.Real);
+            var opacityP = cmd.Parameters.Add("$opacity", SqliteType.Real);
+            var monitorP = cmd.Parameters.Add("$monitor", SqliteType.Integer);
+            var clipP = cmd.Parameters.Add("$clip", SqliteType.Text);
+            var mirroredP = cmd.Parameters.Add("$mirrored", SqliteType.Integer);
+            var isBackgroundP = cmd.Parameters.Add("$isBackground", SqliteType.Integer);
+            var captureKeyP = cmd.Parameters.Add("$captureKey", SqliteType.Text);
+            var showDesktopP = cmd.Parameters.Add("$showDesktop", SqliteType.Integer);
+            var sortP = cmd.Parameters.Add("$sort", SqliteType.Integer);
+            var chatFontSizeP = cmd.Parameters.Add("$chatFontSize", SqliteType.Real);
+            var chatFontColorP = cmd.Parameters.Add("$chatFontColor", SqliteType.Text);
+            var chatBgColorP = cmd.Parameters.Add("$chatBgColor", SqliteType.Text);
+            var chatMaxMsgsP = cmd.Parameters.Add("$chatMaxMsgs", SqliteType.Integer);
+            var chatTimestampsP = cmd.Parameters.Add("$chatTimestamps", SqliteType.Integer);
+            var chatBadgesP = cmd.Parameters.Add("$chatBadges", SqliteType.Integer);
+            var chatMemberColorP = cmd.Parameters.Add("$chatMemberColor", SqliteType.Text);
+            var chatSuperChatColorP = cmd.Parameters.Add("$chatSuperChatColor", SqliteType.Text);
+            var webUriP = cmd.Parameters.Add("$webUri", SqliteType.Text);
+            var mediaPathP = cmd.Parameters.Add("$mediaPath", SqliteType.Text);
+            var mediaIsLoopingP = cmd.Parameters.Add("$mediaIsLooping", SqliteType.Integer);
+            var mediaVolumeP = cmd.Parameters.Add("$mediaVolume", SqliteType.Real);
+            var mediaPlaybackStateP = cmd.Parameters.Add("$mediaPlaybackState", SqliteType.Text);
+
+            foreach (var scene in scenes)
+            {
+                var sort = 0;
+                foreach (var element in scene.Elements)
+                {
+                    if (element is not Source source) continue;
+                    idP.Value = source.Id;
+                    sceneIdP.Value = scene.Id;
+                    assetIdP.Value = (object?)source.AssetId ?? DBNull.Value;
+                    typeP.Value = source.Type.ToString();
+                    nameP.Value = source.Name;
+                    enabledP.Value = source.IsEnabled ? 1 : 0;
+                    xP.Value = source.X;
+                    yP.Value = source.Y;
+                    wP.Value = source.Width;
+                    hP.Value = source.Height;
+                    opacityP.Value = source.Opacity;
+                    monitorP.Value = (object?)source.MonitorIndex ?? DBNull.Value;
+                    clipP.Value = source.ClipShape.ToString();
+                    mirroredP.Value = source.IsMirrored ? 1 : 0;
+                    isBackgroundP.Value = source.IsBackground ? 1 : 0;
+                    captureKeyP.Value = (object?)source.CaptureKey ?? DBNull.Value;
+                    showDesktopP.Value = source.ShowDesktop ? 1 : 0;
+                    sortP.Value = sort++;
+                    chatFontSizeP.Value = source.ChatFontSize;
+                    chatFontColorP.Value = source.ChatFontColor;
+                    chatBgColorP.Value = source.ChatBackgroundColor;
+                    chatMaxMsgsP.Value = source.ChatMaxMessages;
+                    chatTimestampsP.Value = source.ChatShowTimestamps ? 1 : 0;
+                    chatBadgesP.Value = source.ChatShowBadges ? 1 : 0;
+                    chatMemberColorP.Value = source.ChatMemberColor;
+                    chatSuperChatColorP.Value = source.ChatSuperChatColor;
+                    webUriP.Value = (object?)source.WebUri ?? DBNull.Value;
+                    mediaPathP.Value = (object?)source.MediaPath ?? DBNull.Value;
+                    mediaIsLoopingP.Value = source.MediaIsLooping ? 1 : 0;
+                    mediaVolumeP.Value = source.MediaVolume;
+                    mediaPlaybackStateP.Value = source.MediaPlaybackState.ToString();
+                    cmd.ExecuteNonQuery();
+                }
+            }
+        }
+
+        if (webcam != null)
+        {
+            using (var cmd = _connection.CreateCommand())
+            {
+                cmd.CommandText = "INSERT INTO Webcam (Id, DeviceId, Name) VALUES ($id, $device, $name);";
+                cmd.Transaction = tx;
+                cmd.Parameters.AddWithValue("$id", webcam.Id);
+                cmd.Parameters.AddWithValue("$device", webcam.DeviceId);
+                cmd.Parameters.AddWithValue("$name", webcam.Name);
+                cmd.ExecuteNonQuery();
+            }
+
+            using (var cmd = _connection.CreateCommand())
+            {
+                cmd.CommandText = """
+                    INSERT INTO WebcamSceneConfig
+                        (SceneId, WebcamId, IsVisible, X, Y, Width, Height, Opacity,
+                         ClipShape, IsMirrored, BorderColor, BorderOpacity, BorderWidth, BorderAnimation,
+                         RectWidth, RectHeight, SortOrder)
+                    VALUES ($sceneId, $webcamId, $isVisible, $x, $y, $w, $h, $opacity,
+                            $clip, $mirrored, $borderColor, $borderOpacity, $borderWidth, $borderAnimation,
+                            $rectWidth, $rectHeight, $sort)
+                    """;
+                cmd.Transaction = tx;
+                var sceneIdP = cmd.Parameters.Add("$sceneId", SqliteType.Text);
+                var webcamIdP = cmd.Parameters.Add("$webcamId", SqliteType.Text);
+                var visibleP = cmd.Parameters.Add("$isVisible", SqliteType.Integer);
+                var xP = cmd.Parameters.Add("$x", SqliteType.Real);
+                var yP = cmd.Parameters.Add("$y", SqliteType.Real);
+                var wP = cmd.Parameters.Add("$w", SqliteType.Real);
+                var hP = cmd.Parameters.Add("$h", SqliteType.Real);
+                var opacityP = cmd.Parameters.Add("$opacity", SqliteType.Real);
+                var clipP = cmd.Parameters.Add("$clip", SqliteType.Text);
+                var mirroredP = cmd.Parameters.Add("$mirrored", SqliteType.Integer);
+                var colorP = cmd.Parameters.Add("$borderColor", SqliteType.Text);
+                var borderOpacityP = cmd.Parameters.Add("$borderOpacity", SqliteType.Real);
+                var borderWidthP = cmd.Parameters.Add("$borderWidth", SqliteType.Integer);
+                var animationP = cmd.Parameters.Add("$borderAnimation", SqliteType.Text);
+                var rectWidthP = cmd.Parameters.Add("$rectWidth", SqliteType.Real);
+                var rectHeightP = cmd.Parameters.Add("$rectHeight", SqliteType.Real);
+                var sortP = cmd.Parameters.Add("$sort", SqliteType.Integer);
+
+                foreach (var scene in scenes)
+                {
+                    var sort = 0;
+                    foreach (var config in scene.Elements.OfType<WebcamSceneConfig>())
+                    {
+                        sceneIdP.Value = scene.Id;
+                        webcamIdP.Value = config.WebcamId;
+                        visibleP.Value = config.IsVisible ? 1 : 0;
+                        xP.Value = config.X;
+                        yP.Value = config.Y;
+                        wP.Value = config.Width;
+                        hP.Value = config.Height;
+                        opacityP.Value = config.Opacity;
+                        clipP.Value = config.ClipShape.ToString();
+                        mirroredP.Value = config.IsMirrored ? 1 : 0;
+                        colorP.Value = (object?)(string.IsNullOrEmpty(config.BorderColor) ? null : config.BorderColor) ?? DBNull.Value;
+                        borderOpacityP.Value = config.BorderOpacity;
+                        borderWidthP.Value = config.BorderWidth;
+                        animationP.Value = config.BorderAnimation.ToString();
+                        rectWidthP.Value = (object?)config.RectWidth ?? DBNull.Value;
+                        rectHeightP.Value = (object?)config.RectHeight ?? DBNull.Value;
+                        sortP.Value = sort++;
+                        cmd.ExecuteNonQuery();
+                    }
+                }
+            }
+        }
+
+        if (socials != null && socials.Entries.Count > 0)
+        {
+            var socialsId = Guid.NewGuid().ToString();
+            using (var cmd = _connection.CreateCommand())
+            {
+                cmd.CommandText = "INSERT INTO Socials (Id, BarPosition, BarEnabled) VALUES ($id, $pos, $enabled);";
+                cmd.Transaction = tx;
+                cmd.Parameters.AddWithValue("$id", socialsId);
+                cmd.Parameters.AddWithValue("$pos", socials.BarPosition.ToString());
+                cmd.Parameters.AddWithValue("$enabled", socials.BarEnabled ? 1 : 0);
+                cmd.ExecuteNonQuery();
+            }
+
+            using var entryCmd = _connection.CreateCommand();
+            entryCmd.CommandText = """
+                INSERT INTO SocialEntry (Id, SocialsId, Service, Handle, ProfileUrl, Software, SortOrder)
+                VALUES ($id, $socialsId, $service, $handle, $url, $software, $sort)
+                """;
+            entryCmd.Transaction = tx;
+            var eId = entryCmd.Parameters.Add("$id", SqliteType.Text);
+            var eSocialsId = entryCmd.Parameters.Add("$socialsId", SqliteType.Text);
+            var eService = entryCmd.Parameters.Add("$service", SqliteType.Text);
+            var eHandle = entryCmd.Parameters.Add("$handle", SqliteType.Text);
+            var eUrl = entryCmd.Parameters.Add("$url", SqliteType.Text);
+            var eSoftware = entryCmd.Parameters.Add("$software", SqliteType.Text);
+            var eSort = entryCmd.Parameters.Add("$sort", SqliteType.Integer);
+
+            var entrySort = 0;
+            foreach (var entry in socials.Entries)
+            {
+                eId.Value = Guid.NewGuid().ToString();
+                eSocialsId.Value = socialsId;
+                eService.Value = entry.Service.ToString();
+                eHandle.Value = entry.Handle;
+                eUrl.Value = entry.ProfileUrl;
+                eSoftware.Value = (object?)entry.FediverseSoftware ?? DBNull.Value;
+                eSort.Value = entrySort++;
+                entryCmd.ExecuteNonQuery();
+            }
+        }
+
+        if (music != null && !string.IsNullOrWhiteSpace(music.TrackPath))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "INSERT INTO Music (Id, TrackPath, IsEnabled) VALUES ($id, $path, $enabled);";
+            cmd.Transaction = tx;
+            cmd.Parameters.AddWithValue("$id", Guid.NewGuid().ToString());
+            cmd.Parameters.AddWithValue("$path", music.TrackPath);
+            cmd.Parameters.AddWithValue("$enabled", music.IsEnabled ? 1 : 0);
+            cmd.ExecuteNonQuery();
+        }
+
+        using (var cmd = _connection.CreateCommand())
+        {
+            cmd.CommandText = "DELETE FROM Asset WHERE Id NOT IN (SELECT AssetId FROM Source WHERE AssetId IS NOT NULL);";
+            cmd.Transaction = tx;
+            cmd.ExecuteNonQuery();
+        }
+
+        // Save custom background paths and use-default flags per background source
+        foreach (var scene in scenes)
+        {
+            var bg = scene.Elements.OfType<Source>().FirstOrDefault(s => s.IsBackground);
+            if (bg == null) continue;
+
+            var pathKey = $"BackgroundPath_{bg.Id}";
+            if (!string.IsNullOrWhiteSpace(bg.CustomBackgroundPath))
+                UpsertSetting(pathKey, bg.CustomBackgroundPath);
+            else
+            {
+                using var del = _connection.CreateCommand();
+                del.CommandText = "DELETE FROM Settings WHERE Key = $key;";
+                del.Parameters.AddWithValue("$key", pathKey);
+                del.ExecuteNonQuery();
+            }
+
+            var defaultKey = $"BackgroundUseDefault_{bg.Id}";
+            UpsertSetting(defaultKey, bg.UseDefaultBackground ? "1" : "0");
+        }
+
+        // Purge background settings left behind by deleted/duplicated rows
+        // (TASK 25 heal drops extras; their keys must not accumulate).
+        using (var purge = _connection.CreateCommand())
+        {
+            purge.Transaction = tx;
+            purge.CommandText =
+                @"DELETE FROM Settings
+                  WHERE (Key LIKE 'BackgroundUseDefault\_%' ESCAPE '\'
+                      OR Key LIKE 'BackgroundPath\_%' ESCAPE '\')
+                  AND SUBSTR(Key, INSTR(Key, '_') + 1) NOT IN (SELECT Id FROM Source);";
+            purge.ExecuteNonQuery();
+        }
+
+        tx.Commit();
+    }
+}

Services/LayoutStore.Settings.cs

@@ -0,0 +1,292 @@
+using Microsoft.Data.Sqlite;
+using ytLive.Models;
+
+namespace ytLive.Services;
+
+public partial class LayoutStore : IDisposable
+{
+    /// <summary>The last picked mic source name, or null if never chosen. Restored
+    /// at startup so the sound bar reconnects to the same, already-vetted device.</summary>
+    public string? LoadMicSourceName()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'MicSourceName';";
+        var value = cmd.ExecuteScalar() as string;
+        return string.IsNullOrWhiteSpace(value) ? null : value;
+    }
+
+    public void SaveMicSourceName(string? name)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'MicSourceName';";
+        cmd.ExecuteNonQuery();
+        if (string.IsNullOrWhiteSpace(name))
+            return;
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('MicSourceName', $name);";
+        insert.Parameters.AddWithValue("$name", name);
+        insert.ExecuteNonQuery();
+    }
+
+    /// <summary>The user's chosen record output folder (TASK 18), or null to use the
+    /// default <c>%APPDATA%\ytLlive\recordings</c>. Restored at startup.</summary>
+    public string? LoadRecordFolder()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'RecordFolder';";
+        var value = cmd.ExecuteScalar() as string;
+        return string.IsNullOrWhiteSpace(value) ? null : value;
+    }
+
+    public void SaveRecordFolder(string? folder)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'RecordFolder';";
+        cmd.ExecuteNonQuery();
+        if (string.IsNullOrWhiteSpace(folder))
+            return;
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('RecordFolder', $folder);";
+        insert.Parameters.AddWithValue("$folder", folder);
+        insert.ExecuteNonQuery();
+    }
+
+    /// <summary>The cached reusable stream (TASK 5), or null if never created.
+    /// Survives restarts so the pump has its RTMP URL the moment go-live starts
+    /// instead of waiting on the YouTube round-trip.</summary>
+    public ReusableStream? LoadReusableStream()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'ReusableStream';";
+        var value = cmd.ExecuteScalar() as string;
+        if (string.IsNullOrWhiteSpace(value)) return null;
+
+        var parts = value.Split('\u001F');
+        return parts.Length == 3
+            ? new ReusableStream(parts[0], parts[1], parts[2])
+            : null;
+    }
+
+    public void SaveReusableStream(ReusableStream? stream)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'ReusableStream';";
+        cmd.ExecuteNonQuery();
+        if (stream == null) return;
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('ReusableStream', $value);";
+        insert.Parameters.AddWithValue("$value", $"{stream.Id}\u001F{stream.IngestionAddress}\u001F{stream.StreamName}");
+        insert.ExecuteNonQuery();
+    }
+
+    public string? LoadLicenseKey()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'LicenseKey';";
+        var value = cmd.ExecuteScalar() as string;
+        return string.IsNullOrWhiteSpace(value) ? null : value;
+    }
+
+    public void SaveLicenseKey(string? key)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'LicenseKey';";
+        cmd.ExecuteNonQuery();
+        if (string.IsNullOrWhiteSpace(key)) return;
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('LicenseKey', $value);";
+        insert.Parameters.AddWithValue("$value", key);
+        insert.ExecuteNonQuery();
+    }
+
+    /// <summary>When the license was last validated online (ISO 8601), or null if never.</summary>
+    public DateTime? LoadLicenseValidatedAt()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'LicenseValidatedAt';";
+        var value = cmd.ExecuteScalar() as string;
+        if (string.IsNullOrWhiteSpace(value)) return null;
+        return DateTime.TryParse(value, out var dt) ? dt : null;
+    }
+
+    public void SaveLicenseValidatedAt(DateTime? dt)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'LicenseValidatedAt';";
+        cmd.ExecuteNonQuery();
+        if (dt == null) return;
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('LicenseValidatedAt', $value);";
+        insert.Parameters.AddWithValue("$value", dt.Value.ToString("o"));
+        insert.ExecuteNonQuery();
+    }
+
+    /// <summary>Cached premium state (1 = premium, 0 = free). Used for offline
+    /// grace period — the app checks online at startup but uses this cached
+    /// value when offline.</summary>
+    public bool LoadIsPremium()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'IsPremium';";
+        var value = cmd.ExecuteScalar() as string;
+        return value == "1";
+    }
+
+    public void SaveIsPremium(bool isPremium)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = 'IsPremium';";
+        cmd.ExecuteNonQuery();
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ('IsPremium', $value);";
+        insert.Parameters.AddWithValue("$value", isPremium ? "1" : "0");
+        insert.ExecuteNonQuery();
+    }
+
+    public (string TransitionType, double DurationMs) LoadTransitionSettings()
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = 'TransitionType';";
+        var type = cmd.ExecuteScalar() as string;
+
+        using var cmd2 = _connection.CreateCommand();
+        cmd2.CommandText = "SELECT Value FROM Settings WHERE Key = 'TransitionDurationMs';";
+        var dur = cmd2.ExecuteScalar() as string;
+
+        return (type ?? "Fade", dur != null && double.TryParse(dur, out var d) ? d : 300);
+    }
+
+    public void SaveTransitionSettings(string transitionType, double durationMs)
+    {
+        UpsertSetting("TransitionType", transitionType);
+        UpsertSetting("TransitionDurationMs", durationMs.ToString("F0"));
+    }
+
+    // ─── Broadcast metadata (broadcast pull-out) + window geometry ───
+
+    public Models.BroadcastMetadata LoadBroadcastMetadata()
+    {
+        return new Models.BroadcastMetadata
+        {
+            Title = GetSetting("Broadcast.Title") ?? string.Empty,
+            Description = GetSetting("Broadcast.Description") ?? string.Empty,
+            TagsCsv = GetSetting("Broadcast.TagsCsv") ?? string.Empty,
+            Visibility = GetSetting("Broadcast.Visibility") ?? "private",
+            MadeForKids = GetSetting("Broadcast.MadeForKids") == "1",
+            ScheduledStartTime = DateTime.TryParse(GetSetting("Broadcast.ScheduledStartTime"), out var t) ? t : null,
+        };
+    }
+
+    public void SaveBroadcastMetadata(Models.BroadcastMetadata meta)
+    {
+        UpsertSetting("Broadcast.Title", meta.Title);
+        UpsertSetting("Broadcast.Description", meta.Description);
+        UpsertSetting("Broadcast.TagsCsv", meta.TagsCsv);
+        UpsertSetting("Broadcast.Visibility", meta.Visibility);
+        UpsertSetting("Broadcast.MadeForKids", meta.MadeForKids ? "1" : "0");
+        UpsertSetting("Broadcast.ScheduledStartTime",
+            meta.ScheduledStartTime?.ToString("o") ?? string.Empty);
+    }
+
+    // ─── Hotkey bindings (TASK 20 step 2) ───
+
+    /// <summary>
+    /// Load saved hotkey bindings. Returns only entries that have been explicitly
+    /// saved — missing HotkeyIds are unbound (not in the returned dictionary).
+    /// Caller fills in defaults for any missing entries as needed.
+    /// </summary>
+    public Dictionary<HotkeyId, HotkeyChord> LoadHotkeyBindings()
+    {
+        var result = new Dictionary<HotkeyId, HotkeyChord>();
+        foreach (HotkeyId id in Enum.GetValues(typeof(HotkeyId)))
+        {
+            var raw = GetSetting($"Hotkey.{id}");
+            if (raw == null) continue; // not saved = unbound
+            if (raw == "none") continue; // explicitly unbound
+            try
+            {
+                result[id] = HotkeyChord.ParseStorage(raw);
+            }
+            catch (FormatException)
+            {
+                // corrupt entry — skip, will fall back to default
+            }
+        }
+        return result;
+    }
+
+    /// <summary>
+    /// Save hotkey bindings. Null entries in the dictionary mean "unbound" (stored
+    /// as "none"). Only the provided entries are saved; previously saved entries
+    /// for HotkeyIds not in the dictionary are deleted.
+    /// </summary>
+    public void SaveHotkeyBindings(Dictionary<HotkeyId, HotkeyChord?> bindings)
+    {
+        // Delete all existing hotkey settings first
+        foreach (HotkeyId id in Enum.GetValues(typeof(HotkeyId)))
+        {
+            using var cmd = _connection.CreateCommand();
+            cmd.CommandText = "DELETE FROM Settings WHERE Key = $key;";
+            cmd.Parameters.AddWithValue("$key", $"Hotkey.{id}");
+            cmd.ExecuteNonQuery();
+        }
+
+        // Save the new bindings
+        foreach (var (id, chord) in bindings)
+        {
+            var value = chord?.ToString() ?? "none";
+            UpsertSetting($"Hotkey.{id}", value);
+        }
+    }
+
+    public (double Left, double Top, double Width, double Height, string State)? LoadWindowState()
+    {
+        var left = GetSetting("Window.Left");
+        var top = GetSetting("Window.Top");
+        var width = GetSetting("Window.Width");
+        var height = GetSetting("Window.Height");
+        var state = GetSetting("Window.State");
+        if (left == null || top == null || width == null || height == null) return null;
+        if (!double.TryParse(left, out var l) || !double.TryParse(top, out var t) ||
+            !double.TryParse(width, out var w) || !double.TryParse(height, out var h))
+            return null;
+        return (l, t, w, h, state ?? "Normal");
+    }
+
+    public void SaveWindowState(double left, double top, double width, double height, string state)
+    {
+        UpsertSetting("Window.Left", left.ToString("F0"));
+        UpsertSetting("Window.Top", top.ToString("F0"));
+        UpsertSetting("Window.Width", width.ToString("F0"));
+        UpsertSetting("Window.Height", height.ToString("F0"));
+        UpsertSetting("Window.State", state);
+    }
+
+    private string? GetSetting(string key)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "SELECT Value FROM Settings WHERE Key = $key;";
+        cmd.Parameters.AddWithValue("$key", key);
+        return cmd.ExecuteScalar() as string;
+    }
+
+    private void UpsertSetting(string key, string value)
+    {
+        using var cmd = _connection.CreateCommand();
+        cmd.CommandText = "DELETE FROM Settings WHERE Key = $key;";
+        cmd.Parameters.AddWithValue("$key", key);
+        cmd.ExecuteNonQuery();
+
+        using var insert = _connection.CreateCommand();
+        insert.CommandText = "INSERT INTO Settings (Key, Value) VALUES ($key, $value);";
+        insert.Parameters.AddWithValue("$key", key);
+        insert.Parameters.AddWithValue("$value", value);
+        insert.ExecuteNonQuery();
+    }
+}

ViewModels/MainViewModel.Recording.cs

@@ -0,0 +1,121 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using System.Windows;
+using Microsoft.Win32;
+using ytLive.Helpers;
+using ytLive.Services;
+
+namespace ytLive.ViewModels;
+
+public partial class MainViewModel : ViewModelBase
+{
+    private string? _recordFolder;
+    public string RecordFolderDisplay => _recordFolder ?? DefaultRecordFolder();
+    private string? _activeRecordPath;
+    private DateTime _recordStartTime;
+    private TimeSpan _recordLength;
+
+    private string? StartRecordFile()
+    {
+        try
+        {
+            var folder = _recordFolder ?? DefaultRecordFolder();
+            Directory.CreateDirectory(folder);
+            var name = RecordingFile.BuildStartName(DateTime.Now) + ".mp4";
+            var path = Path.Combine(folder, name);
+            _activeRecordPath = path;
+            return path;
+        }
+        catch (Exception ex)
+        {
+            AppLog.Write(ex, "Recording: failed to prepare output path");
+            return null;
+        }
+    }
+
+    private async Task FinalizeRecordingAsync()
+    {
+        var startPath = _activeRecordPath;
+        _activeRecordPath = null;
+        if (string.IsNullOrEmpty(startPath)) return;
+        try
+        {
+            while (_framePump.IsRunning) await Task.Delay(50);
+
+            if (!File.Exists(startPath))
+            {
+                AppLog.Write($"Recording: output not found for rename: {startPath}");
+                return;
+            }
+            _recordLength = _liveElapsed;
+            var autoStem = RecordingFile.BuildFinalName(_recordStartTime, _recordLength);
+            var dir = Path.GetDirectoryName(startPath)!;
+
+            // Manual rename modal: give the creator a chance to name the recording;
+            // null = keep the auto name (or the default recorded above).
+            string stem = autoStem;
+            var dialog = new RenameRecordingDialog(autoStem);
+            if (dialog.ShowDialog() == true && !string.IsNullOrEmpty(dialog.ResultFileName))
+                stem = dialog.ResultFileName;
+
+            var finalPath = UniquePath(Path.Combine(dir, stem + ".mp4"));
+            File.Move(startPath, finalPath);
+            AppLog.Write($"Recording saved: {finalPath}");
+            _notifications.Info("Recording saved",
+                Path.GetFileName(finalPath) + " — you can rename it in your videos folder at any time.");
+        }
+        catch (Exception ex)
+        {
+            AppLog.Write(ex, "Recording: rename-on-stop failed");
+            _notifications.Error("Recording saved",
+                $"The recording was written but couldn't be renamed: {Path.GetFileName(startPath)}");
+        }
+    }
+
+    private static string UniquePath(string path)
+    {
+        if (!File.Exists(path)) return path;
+        var dir = Path.GetDirectoryName(path)!;
+        var name = Path.GetFileNameWithoutExtension(path);
+        var ext = Path.GetExtension(path);
+        for (var i = 2; ; i++)
+        {
+            var candidate = Path.Combine(dir, $"{name}-{i}{ext}");
+            if (!File.Exists(candidate)) return candidate;
+        }
+    }
+
+    private void ChooseRecordFolder()
+    {
+        var dialog = new Microsoft.Win32.OpenFolderDialog
+        {
+            Title = "Choose a folder for local recordings",
+            InitialDirectory = _recordFolder ?? DefaultRecordFolder(),
+        };
+        if (dialog.ShowDialog() == true)
+        {
+            _recordFolder = dialog.FolderName;
+            _layoutStore.SaveRecordFolder(_recordFolder);
+            OnPropertyChanged(nameof(RecordFolderDisplay));
+            _notifications.Info("Record folder set", _recordFolder);
+        }
+    }
+
+    private void ResetRecordFolder()
+    {
+        _recordFolder = null;
+        _layoutStore.SaveRecordFolder(null);
+        OnPropertyChanged(nameof(RecordFolderDisplay));
+        _notifications.Info("Record folder reset", RecordFolderDisplay);
+    }
+
+    internal static string DefaultRecordFolder()
+    {
+        var downloads = Path.Combine(
+            Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads");
+        return Directory.Exists(downloads)
+            ? downloads
+            : Environment.GetFolderPath(Environment.SpecialFolder.MyVideos);
+    }
+}

ViewModels/MainViewModel.Streaming.Operations.cs

@@ -96,23 +96,6 @@ public partial class MainViewModel : ViewModelBase
 
     /// <summary>Creates the record file (auto-named <c>ty-…-0000.mp4</c> in the record
     /// folder) and returns its path, or null when the folder can't be prepared.</summary>
-    private string? StartRecordFile()
-    {
-        try
-        {
-            var folder = _recordFolder ?? DefaultRecordFolder();
-            Directory.CreateDirectory(folder);
-            var name = RecordingFile.BuildStartName(DateTime.Now) + ".mp4";
-            var path = Path.Combine(folder, name);
-            _activeRecordPath = path;
-            return path;
-        }
-        catch (Exception ex)
-        {
-            AppLog.Write(ex, "Recording: failed to prepare output path");
-            return null;
-        }
-    }
 
     /// <summary>One-click go-live (TASK 5): ensure the reusable stream, create a
     /// broadcast bound to it, then start the frame pump. The pump reads the RTMP
@@ -269,92 +252,11 @@ public partial class MainViewModel : ViewModelBase
     /// <summary>On stop the auto-named <c>ty-…-0000.mp4</c> file is renamed to carry
     /// the real recording length (<c>ty-…-hh2mm2.mp4</c>), with a numeric suffix on
     /// name collisions. Runs only after the pump has fully closed the file.</summary>
-    private async Task FinalizeRecordingAsync()
-    {
-        var startPath = _activeRecordPath;
-        _activeRecordPath = null;
-        if (string.IsNullOrEmpty(startPath)) return;
-        try
-        {
-            while (_framePump.IsRunning) await Task.Delay(50);
 
-            if (!File.Exists(startPath))
-            {
-                AppLog.Write($"Recording: output not found for rename: {startPath}");
-                return;
-            }
-            _recordLength = _liveElapsed;
-            var autoStem = RecordingFile.BuildFinalName(_recordStartTime, _recordLength);
-            var dir = Path.GetDirectoryName(startPath)!;
 
-            // Manual rename modal: give the creator a chance to name the recording;
-            // null = keep the auto name (or the default recorded above).
-            string stem = autoStem;
-            var dialog = new RenameRecordingDialog(autoStem);
-            if (dialog.ShowDialog() == true && !string.IsNullOrEmpty(dialog.ResultFileName))
-                stem = dialog.ResultFileName;
-
-            var finalPath = UniquePath(Path.Combine(dir, stem + ".mp4"));
-            File.Move(startPath, finalPath);
-            AppLog.Write($"Recording saved: {finalPath}");
-            _notifications.Info("Recording saved",
-                Path.GetFileName(finalPath) + " — you can rename it in your videos folder at any time.");
-        }
-        catch (Exception ex)
-        {
-            AppLog.Write(ex, "Recording: rename-on-stop failed");
-            _notifications.Error("Recording saved",
-                $"The recording was written but couldn't be renamed: {Path.GetFileName(startPath)}");
-        }
-    }
-
-    private static string UniquePath(string path)
-    {
-        if (!File.Exists(path)) return path;
-        var dir = Path.GetDirectoryName(path)!;
-        var name = Path.GetFileNameWithoutExtension(path);
-        var ext = Path.GetExtension(path);
-        for (var i = 2; ; i++)
-        {
-            var candidate = Path.Combine(dir, $"{name}-{i}{ext}");
-            if (!File.Exists(candidate)) return candidate;
-        }
-    }
-
-    private void ChooseRecordFolder()
-    {
-        var dialog = new Microsoft.Win32.OpenFolderDialog
-        {
-            Title = "Choose a folder for local recordings",
-            InitialDirectory = _recordFolder ?? DefaultRecordFolder(),
-        };
-        if (dialog.ShowDialog() == true)
-        {
-            _recordFolder = dialog.FolderName;
-            _layoutStore.SaveRecordFolder(_recordFolder);
-            OnPropertyChanged(nameof(RecordFolderDisplay));
-            _notifications.Info("Record folder set", _recordFolder);
-        }
-    }
-
-    private void ResetRecordFolder()
-    {
-        _recordFolder = null;
-        _layoutStore.SaveRecordFolder(null);
-        OnPropertyChanged(nameof(RecordFolderDisplay));
-        _notifications.Info("Record folder reset", RecordFolderDisplay);
-    }
 
     /// <summary>Falls back to the user's Downloads folder when no preference is set;
     /// returns MyVideos if Downloads doesn't exist.</summary>
-    internal static string DefaultRecordFolder()
-    {
-        var downloads = Path.Combine(
-            Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Downloads");
-        return Directory.Exists(downloads)
-            ? downloads
-            : Environment.GetFolderPath(Environment.SpecialFolder.MyVideos);
-    }
 
     // Full encoder options for the current tier, or null when no RTMP URL is
     // available — the pump then skips the encoder entirely (TASK 5 fills the seam).

ViewModels/MainViewModel.Streaming.cs

@@ -38,14 +38,9 @@ public partial class MainViewModel : ViewModelBase
     private bool _recordPillOn;
     private bool _onAirPillOn;
     private bool _isRecording;
-    private string? _recordFolder;
 
     /// <summary>Resolved record folder — the configured choice, or Downloads (0th case).</summary>
-    public string RecordFolderDisplay => _recordFolder ?? DefaultRecordFolder();
 
-    private string? _activeRecordPath;
-    private DateTime _recordStartTime;
-    private TimeSpan _recordLength;
 
     private readonly FramePump _framePump;
 

ViewModels/index.md

@@ -70,5 +70,7 @@ commit, tag `refactor-commit-N`, no per-commit push).
 - [x] **Commit B · `refactor-commit-B`** — **Streaming** → `MainViewModel.Streaming.cs` 789 → **330** + new **`MainViewModel.Streaming.Operations.cs`** (459 lines). Moved the go-live/record/health operation bodies (`StartSession`, `BeginRecordOnly`, `BeginGoLive`, `StartRecordFile`, `PrepareAndStartLiveAsync`, `PollHealthAsync`/`OnHealthPollTick`/`ApplyHealthIssue`, `StopStream`, `FinalizeRecordingAsync`, `UniquePath`, `ChooseRecordFolder`, `ResetRecordFolder`, `DefaultRecordFolder`, `OnFramePumpFailed`, `OnFramePumpHealthUpdated`, `ApplyHealth`, `ResetHealth`, `BuildEncoderOptions`) into the Operations partial; Streaming.cs keeps state + quality/resolution tiers + session timer + command declarations. Pruned dead usings both files. Pending: Background, SocialsDialogViewModel, LayoutStore.
 - [x] **Commit C · `refactor-commit-C`** — **Background** → `MainViewModel.Background.cs` 567 → **418** + new **`MainViewModel.Background.Model.cs`** (163 lines). Moved the static scene-model helpers (`LoadBackgroundImage`, `CreatePlaceholderSnapshot`, `EnsureBackground`, `CreateBackground`, `NormalizeBackgrounds`, `AllBackgrounds`, `ResolveAutoCaptureKey`, `MonitorKeyPrefix`) into the Model partial; Background.cs keeps capture/live state + operations (`UpdateActiveBackground`, `UpdateBackgroundImage`, `RefreshSnapshotsAsync`, `ReacquireScreenCaptures`, `OnScreenPreviewBitmapChanged`, `OnFullscreenMonitorChanged`, `RefreshBackgroundAutoCapture`, `BrowseBackground`, `ClearBackgroundCaptureAsync`, `RedesignateBackgroundAsync`, `ChangeBackgroundCaptureAsync`, `SetBackgroundCapture`, `DefaultBackgroundAsset`, `HealBackgrounds`, `StampDefaultBackgroundAsset`). Pending: SocialsDialogViewModel, LayoutStore.
 - [x] **Commit D · `refactor-commit-D`** — **SocialsDialog** → `SocialsDialogViewModel.cs` 515 → **334** + new **`SocialSlotViewModel.cs`** (183 lines). Moved the `DialogEntry` record + the row-level `SocialSlotViewModel` (six-fixed-slot row VM: service/logo/lock/edit/validate state + computed `Show*` flags) into its own file; `SocialsDialogViewModel.cs` keeps the dialog VM (sign-in gate, validation orchestration, commit). `DialogEntry` stays `public` in the same namespace so both files see it. Pending: LayoutStore.
+- [x] **Commit E · `refactor-commit-E`** — **LayoutStore** → `LayoutStore.cs` 1402 split into 6 concern-based partials: **`LayoutStore.cs`** (47: shell — `Instance`, fields, ctor + `EnsureSchema`, `GetUserVersion`, `Dispose`), **`LayoutStore.Migrations.cs`** (495: all `Migrate*` + `EnsureSchema`), **`LayoutStore.Load.cs`** (221: `Load`), **`LayoutStore.Save.cs`** (339: `Save`), **`LayoutStore.Settings.cs`** (292: mic/record-folder/reusable-stream + license/transition/broadcast/hotkey/window `GetSetting`/`UpsertSetting`), **`LayoutStore.Assets.cs`** (41: `GetAssetBytes`/`UpsertAsset`). **PHASE 3 COMPLETE — no production `.cs` over 500.**
+- [x] **Commit F · `refactor-commit-F`** — **Recording (context/concern)** → new **`MainViewModel.Recording.cs`** (121 lines). The encoder (`Services/Encoder/FfmpegEncoder.cs`) and frame pump (`Services/Encoder/FramePump.cs`) were ALREADY extracted services — the planned "extract FFmpegEncoder/StreamHealthMonitor/FramePump" was a no-op premise. The honest functional seam was the local recording-output concern: `StartRecordFile`, `FinalizeRecordingAsync`, `UniquePath`, `ChooseRecordFolder`, `ResetRecordFolder`, `DefaultRecordFolder` + fields `_recordFolder`/`RecordFolderDisplay`/`_activeRecordPath`/`_recordStartTime`/`_recordLength` moved out of the live-stream orchestration. `MainViewModel.Streaming.Operations.cs` 475 → **377**; `MainViewModel.Streaming.cs` 328 → **323**. Same partial class, MVVM glue untouched.
 The partial `.cs` files land next to `MainViewModel.cs` in this folder as the split
 proceeds; each partial carries its own `using`s and re-declares nothing from core.