docs(changelog): stop live-streaming message flicker on light themes (#5328)

CHANGELOG.md

@@ -9,6 +9,8 @@ _No unreleased changes. Entries are moved into their version block when a releas
 
 ### Fixed
 
+- **No more white flicker/flash while the assistant streams on light themes.** Live token-by-token markdown updates no longer inherit the global dark/light `color`/`background` transition, so the streaming turn paints instantly instead of briefly fading on each token. Theme-switch transitions elsewhere are unchanged. (#5328)
+
 - **No more false "Clarify endpoint unavailable. Please restart server." toast.** The clarify-pending poll used to fire the restart-server warning on any error whose message merely contained "404"/"not found" — so a harmless stale `Session not found` from a just-switched profile mis-triggered it even though the clarify endpoint was fine. The poll now branches on the structured HTTP status: a session-scoped 404 is treated as a stale poll (silently stops), and the restart warning fires only on a genuine missing-route 404. Interrupt provenance is also now labeled (explicit Stop vs stream-lifecycle) for clearer settlement. (#5345)
 
 - **Ghost sessions can be cleared from the sidebar.** Bulk index-only "Untitled" sessions — rows left in the session index with no backing conversation file — are now pruned by the session cleanup sweep instead of lingering forever and un-removable. A legitimate session (with a saved file or an active in-memory session) is never touched. (#5331)