docs(changelog): record session-scoped prompt resources and unified footer

Author: elkaix

CHANGELOG.md

@@ -15,6 +15,8 @@ GitHub Releases page; `0.8.0` is the new starting line.
 
 ## Unreleased
 
+- Scope prompt Git status, toasts, history, and clipboard to each shell session with a new `/prompt-history status|clear` command, bounded locked history storage, and cross-session isolation.
+- Unify the shell footer behind one per-frame view model shared by the legacy and card renderers, and key theme style-resolver caching by terminal capabilities.
 - Fix a rare queued-follow-up "ghost card": echoing a drained queued command now commits through the scrollback handoff (which hides the input card before the terminal teardown erases the prompt), so the input-card border can no longer fossilize into scrollback above the echoed command under heavy load.
 - Freeze the public shell prompt compatibility contract with constructor and rendering coverage.
 - Unify slash and file-mention completion behind one canonical completion context, adding quoted `@"path with spaces"` file mentions.