docs: CHANGELOG reflects auto-record + E.4 embed + snapshot + recording-duration

CHANGELOG.md

@@ -180,6 +180,36 @@ For operators who want to launch TeamsISO and never look at the Teams UI:
   right-click = stop. `TeamsLauncher.TryLaunch` now collects per-attempt
   errors (no more silent fall-through) and adds the AppX-activation
   fallback for hosts where the `ms-teams:` URI handler is misconfigured.
+- **Auto-record when Teams joins a meeting** preference. Recording auto-
+  flips ON when Teams transitions into a call (UIA Leave button appears)
+  and auto-flips OFF when the call ends. Removes the manual Record toggle
+  step from unattended-show workflows.
+- **Phase E.4 (experimental) — SetParent embedding.** Reparents Teams' main
+  window into a TeamsISO-owned host (`TeamsEmbedWindow`) so Teams appears
+  visually INSIDE TeamsISO. Strips Teams' window chrome and resizes to
+  fit. Modern Teams runs WebView2 in its main window which can render
+  glitches after reparent; if so the operator unticks and falls back to
+  auto-hide mode. `TeamsLauncher.EmbedTeamsInto` / `RestoreEmbed` /
+  `ResizeEmbedded` form the lifecycle. Restore-on-close runs in a finally
+  block so a crash can't leave Teams orphaned with stripped window styles.
+- **Right-click → Save current frame** on a participant row. Encodes the
+  latest `ProcessedFrame` as a PNG under
+  `%USERPROFILE%\Pictures\TeamsISO\<participant>_<timestamp>.png`.
+  Useful for highlight reels, social posts, bug reports.
+- **Open /ui button** in Settings → DISPLAY → Control surface section.
+  Fires the URL into the default browser for one-click preview of the
+  embedded control panel.
+- **Recording badge in footer shows elapsed duration** alongside the count
+  (`REC 3 · 12:45`). Separate timer from the session timer because
+  recording can start AFTER the meeting begins.
+- **Quick-join Teams meeting from URL** in the IN-CALL bar — paste a
+  `teams.microsoft.com/l/meetup-join/...` or `msteams:/l/meetup-join/...`
+  link, click Join, Teams launches into the meeting in one shot.
+- **IN-CALL bar surfaces Teams meeting state** — `IN CALL · <meeting title>`
+  / `READY` / empty. UIA probe at 1Hz for the Leave button, meeting title
+  extracted from Teams' window title with brand suffix stripped.
+- **Auto-launch Teams + auto-hide windows** preferences for the headless
+  "I only see TeamsISO" workflow.
 
 #### UI polish — visible affordances on the dark canvas
 - Hover state on every themed button (Ghost / Caption / RailIcon / IsoToggle)