Add task summaries, closed-task search and a summary turn before discard

internal/git/git.go

@@ -7,6 +7,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"slices"
 	"strconv"
 	"strings"
 )
@@ -84,11 +85,22 @@ func RemoveDetachedWorktree(repo, path string) error {
 }
 
 func RemoveWorktree(repo, path, branch string) error {
-	_, err := run(repo, "worktree", "remove", "--force", path)
+	list, err := run(repo, "worktree", "list", "--porcelain")
 	if err != nil {
 		return err
 	}
+	_, statErr := os.Stat(path)
+	if statErr == nil || slices.Contains(strings.Split(list, "\n"), "worktree "+path) {
+		_, err = run(repo, "worktree", "remove", "--force", path)
+		if err != nil {
+			return err
+		}
+	}
 
+	_, _, code, err := runCode(repo, nil, "rev-parse", "--verify", "--quiet", "refs/heads/"+branch)
+	if err != nil || code != 0 {
+		return err
+	}
 	_, err = run(repo, "branch", "-D", branch)
 	return err
 }