Reparents Teams' main top-level window into a TeamsISO-owned host via Win32 SetParent + window-style stripping. Operator gets Teams visually INSIDE TeamsISO instead of as a separate window — completes the 'Teams runs within this app' direction the user asked for after auto-hide.
Strictly opt-in (DISPLAY tab → 'Embed Teams window (experimental)'). Modern Teams runs WebView2 in its main window; WebView2 is sensitive to parent changes and may render glitches or refuse focus. If so, operator unticks and falls back to auto-hide mode.
Implementation:
- TeamsLauncher.EmbedTeamsInto(hostHwnd, w, h): finds Teams' main window (longest-title heuristic — same as GetActiveWindowTitle), saves original parent + WS_STYLE, SetParents into host, strips WS_CAPTION + WS_THICKFRAME + WS_BORDER + WS_DLGFRAME + WS_POPUP, adds WS_CHILD, MoveWindow to fit.
- TeamsLauncher.RestoreEmbed(): SetParent back to desktop + restore saved window styles. Idempotent — safe to call on shutdown even if nothing was embedded.
- TeamsLauncher.ResizeEmbedded(w, h): MoveWindow to new dimensions; called from host SizeChanged event.
- New TeamsEmbedWindow chromeless host with an EXPERIMENTAL pill in the caption. Loaded → grab HwndSource from EmbedHost Border → call EmbedTeamsInto. SizeChanged → ResizeEmbedded. Closed → RestoreEmbed (in try/finally so a crash can't leave Teams orphaned). Friendly fallback messages if no Teams window exists or HWND grab fails.
- Settings → DISPLAY → checkbox + 'Open embed window' button (gated by the checkbox). Persisted via EmbedTeamsWindow on UIPreferences.
Two new persisted preferences in DISPLAY settings, paired to give operators the 'launch TeamsISO, never see Teams' experience the user asked for:
- LaunchTeamsOnStartup: TeamsISO auto-starts Teams in the background each launch (fire-and-forget background task in App.OnStartup, after the main window has materialized so a slow Teams launch doesn't delay the UI).
- AutoHideTeamsWindows: as soon as Teams' windows materialize after launch, hide them. New TeamsLauncher.AutoHideAfterLaunchAsync runs a polling loop (250ms / up to 15s) that catches the splash, main window, and any follow-up panels Teams opens. Teams takes 2-5s to render its main window and the splash arrives separately, so a one-shot hide right after launch wouldn't be enough.
When TeamsISO starts and Teams is already running (from a prior session), the auto-hide path still fires so the 'I only see TeamsISO' rule applies even when Teams was launched externally.
Operator drives everything through the IN-CALL bar (mute / camera / share / leave / marker) + participants DataGrid (ISO routing). Eye-toggle in the rail still restores Teams windows on demand.
Both toggles default to off — opt-in. Persisted via UIPreferences so they survive process restart.
Two user-reported bugs:
1) CheckBox content was clipping in the 380px settings panel ('Control surface (Stream Deck / Companion / w...' / 'LAN-reachable (allow other machines on yo...'). The Wd.CheckBox template used a horizontal StackPanel which doesn't bound child width, so long Content strings ran off the column without wrapping. Replaced StackPanel with a Grid (Auto + *) and injected a TextBlock style with TextWrapping=Wrap into the ContentPresenter resources — when WPF auto-wraps a string Content in a TextBlock, the resource lookup gives it Wrap.
2) The rail Launch Teams button ambushed operators: clicking with Teams already running (which is common when the eye-toggle has hidden Teams' windows) opened a 'Close all Teams windows now?' dialog. Operators expect Launch to mean 'show me Teams', not 'stop Teams'. Split the actions:
- Left-click: Teams not running → launch; Teams hidden → restore + foreground; Teams visible → bring to front. Always idempotent-progressive.
- Right-click: ask to stop Teams (preserves the kill path for those who want it).
TeamsLauncher.TryLaunch now collects per-attempt errors instead of swallowing them — a real failure surfaces 'ms-teams: URI → <reason>' / 'AppsFolder shell → <reason>' / 'classic Update.exe → not found at <path>' so 'No Teams found' isn't a black box.
Also added a 2nd path: explorer.exe shell:appsFolder\\\\MSTeams_8wekyb3d8bbwe!MSTeams (AppX activation via the OS's own Start-menu verb) as a fallback if the URI handler is misconfigured. Removed the broken bare-stub call to %LOCALAPPDATA%\\\\Microsoft\\\\WindowsApps\\\\ms-teams.exe — that's a 0-byte AppX placeholder that never worked outside an AppX context.
Four polish items + a test pass.
1. Inter Variable (rsms/inter v3.19, OFL) is bundled at Assets/Fonts/Inter.ttf (~800 KB) and registered as a WPF Resource. WildDragonTheme.xaml's Wd.Font.Sans now points at pack://application:,,,/Assets/Fonts/#Inter so the typography matches wilddragon.net regardless of whether the user has Inter installed system-wide. Falls back to Segoe UI Variable Display if the resource is missing.
2. 'Stop all ISOs' button at the right of the participants header. Bound to a new MainViewModel.StopAllIsosCommand that snapshots the enabled list, awaits DisableIsoAsync sequentially, and silently swallows per-pipeline failures (best-effort emergency stop). CanExecute gates on whether any ISO is currently enabled.
3. WindowStateStore service persists the main window's Left/Top/Width/Height/State to %LOCALAPPDATA%\\TeamsISO\\window.json on close and restores it on SourceInitialized. Multi-monitor friendly: a saved position with no corner inside any virtual screen is rejected so a disconnected monitor doesn't strand the window off-screen.
4. Two new unit tests cover FrameProcessor's drops + duplicates accounting. 76/76 unit tests pass (was 74).
Six related polish items, all building on tonight's groundwork.
1. App icon: teamsiso.ico generated from dragon-mark.png at 7 sizes (16-256), wired as ApplicationIcon in the WPF csproj, MainWindow.Icon, AboutWindow.Icon, and ARPPRODUCTICON in the WiX MSI. Taskbar / window / Add-Remove-Programs all show the dragon mark now.
2. Running incoming FPS: ring buffer of last 30 frame timestamps in IsoPipeline; ComputeFps() returns moving-average rate. Surfaced on IsoHealthStats.IncomingFps and shown in the Source column of the participants DataGrid as 'WxH · 59.94 fps'. Resets cleanly on every supervisor restart.
3. Drops counter: FrameProcessor.Stats already aggregated FramesDropped (closest-frame strategy when the receiver outpaces the processor) and FramesDuplicated; just plumbed _liveProcessor through IsoPipeline so GetStats() can read them. Exposed in the Live column under the in/out counters as a coral-tinted 'drop N'.
4. Console --version flag: prints engine version (with embedded git SHA), .NET version, OS, NDI runtime banner, expected prefix, exit-code legend, plus a wilddragon.net link. Useful for support tickets.
5. About dialog: chromeless modal with the dragon mark + version / .NET / OS / NDI runtime fields and a link to wilddragon.net. Triggered by clicking the rail logo.
6. Teams launcher Stop toggle: TeamsLauncher gains IsRunning() and StopAll(). The rail's Teams button now toggles — if Teams is up, ask to close all Teams windows via WM_CLOSE; otherwise launch as before. Confirms before stopping so we don't kill the user's call mid-transition.
Tests: 74/74 unit + 9/9 NDI integration green throughout. MSI builds clean and now embeds the dragon icon for ARP.
First step of Phase E.1 from the new spec at docs/superpowers/specs/2026-05-08-embedded-teams-orchestration.md: a third icon in the left rail launches the Microsoft Teams desktop client as a subprocess of TeamsISO so the operator doesn't have to leave the app to start a meeting.
Services/TeamsLauncher tries the ms-teams: URI first, falls back to %LOCALAPPDATA%\\Microsoft\\WindowsApps\\ms-teams.exe (new Teams), then the classic Update.exe handoff. On failure surfaces a friendly MessageBox with the install link.
The spec doc lays out the full three-phase roadmap (launcher -> window orchestration -> in-app meeting controls via Graph API or UIAutomation) and explicitly calls out what's out of scope (replacing Teams' media stack).
_NEXT.md updated to mark Phase D done and queue Phase E + remaining polish items (code-signing, Inter/JetBrains Mono font bundling, real Wild Dragon dragon-mark, drops counter, running-fps display).
MainWindow drops the standard Windows title bar (WindowStyle=None + WindowChrome with CaptionHeight=44, ResizeBorderThickness=6, UseAeroCaptionButtons=False) and draws its own minimize / maximize-restore / close buttons inline in the existing header strip. The custom buttons opt into shell:WindowChrome.IsHitTestVisibleInChrome=True so clicks fire on them rather than starting a window drag.
Result: the entire top of the window is now ours, matching the Microsoft Teams desktop client's flush header look. The 'TeamsISO + by Wild Dragon' branding sits at the same baseline as the engine-status pill and the caption controls, and dragging anywhere not occupied by an interactive widget moves the window.
Caption-button styles in the theme: 46x32 hover-tinted, with the close button turning the Windows 11 #C42B1C red on hover. Maximize-button glyph swaps between the single-rectangle and overlapping-rectangles variants on StateChanged.
Drive-by: ParticipantViewModel.{FramesIn,FramesOut,IncomingResolution} setters dropped from private to public so {Run Text=...} bindings (which default to TwoWay on Run) can attach without WPF throwing 'cannot work on read-only property'.
- TeamsISO.App: hand-rolled net8.0-windows WPF csproj since the WPF
template isn't shipped on linux-arm64 .NET SDK; UI is a placeholder
for Phase C.
- TeamsISO.Engine.IntegrationTests: cross-platform xunit project with a
skipped scaffold fact tagged [Trait("requires", "ndi")] for Phase B.
- TeamsISO.Linux.slnf: solution filter for non-Windows CI that excludes
the WPF project (which can only build on Windows).
