[eric] changelog: 1.7.8 gains the app-wedge, app-delete, workflow-browser, fill-screen and board-wipe lines

backend/apps/help/changelog.py

@@ -34,6 +34,11 @@ P_RELEASES: List[ReleaseNote] = [
             "The model you pick is the model that runs. The retired free tier was quietly forcing every session onto Haiku no matter what the picker said; it is gone, and installs still carrying it are moved off.",
             "Fable is no longer offered in the model picker. It never worked when selected.",
             "A chat that started failing on \"that request hit a snag\" now recovers on your next message instead of staying broken until you branch it.",
+            "Apps no longer get stuck on \"Starting preview\" forever; one app serving a prebuilt bundle used to silently wedge every other app until a restart.",
+            "Deleting an app now actually removes it from disk instead of leaving its full source tree behind invisibly.",
+            "A workflow that drives a browser now shows up as a real chat card while it runs, its browser lives inside that card, and both are cleaned up when the run ends.",
+            "A chat tiled to fill the screen now hides the canvas controls the same way fullscreen does, so tidy and zoom stop covering the composer.",
+            "A momentary read error can no longer wipe a dashboard's layout permanently; the app now treats it as an error instead of an empty board.",
             "A new dashboard shows the starter screen again instead of an empty grid with nothing on it.",
             "The canvas can no longer break into a state where panning dies, cards vanish, and the zoom reads NaN; a bad camera value is refused instead of saved.",
             "A stray trackpad pinch outside the canvas no longer magnifies the whole app out of view; it snaps back within a second.",