fix: auto-expire worktree action error banners (#4063)

* fix: auto-expire worktree action error banners

refs #1827

* fix: restart endpoint error timeout on repeated errors

Route every transient client-side action error through a setter that installs a fresh deadline, so an identical repeated message cannot inherit an older, nearly-expired deadline.

refs #1827

* test: derive endpoint error expiry assertions from stored deadline

refs #1827

1 files changed, 3 insertions, 2 deletions

diff --git a/src/client/shell/word_selection.rs b/src/client/shell/word_selection.rs
index 42a03fc2..f4329ced 100644
--- a/src/client/shell/word_selection.rs
+++ b/src/client/shell/word_selection.rs
@@ -189,8 +189,9 @@ impl ClientShellState {
             other => {
                 if matches!(other, Ok(value) if !matches!(value, crate::api::schema::ResponseResult::PaneSelection { .. }))
                 {
-                    self.endpoint_error =
-                        Some("endpoint returned an unexpected word-selection result".to_owned());
+                    self.set_endpoint_error(
+                        "endpoint returned an unexpected word-selection result",
+                    );
                 }
                 self.cancel_word_selection();
                 return (true, Vec::new());