Update changelog.md for version 1.0.82

Author: github-actions[bot]

changelog.md

@@ -1,3 +1,9 @@
+## 1.0.82 - 2026-08-29
+
+- A message typed while /worktree or /move is preparing the worktree no longer breaks the switch into it
+- Ctrl+E expands the plan approval card to show the full plan again
+- Show the specific authentication failure (such as 401 Bad credentials) instead of only the /login prompt
+
 ## 1.0.81 - 2026-08-27
 
 - The plugins dashboard is available to everyone: run `/plugin`, `/mcp`, or `/skills`. Set `PLUGINS_DASHBOARD=false` to opt out of it and the `copilot plugins` command.