fix: stabilize beads and config tests (#560)

* fix: stabilize beads and config tests

* fix: remove t.Parallel() incompatible with t.Setenv()

The test now uses t.Setenv() which cannot be used with t.Parallel() in Go.
This completes the conflict resolution from the rebase.

* style: fix gofmt issue in beads_test.go

Remove extra blank line in comment block.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

internal/beads/beads_redirect.go

@@ -23,6 +23,9 @@ import (
 // this indicates an errant redirect file that should be removed. The function logs a
 // warning and returns the original beads directory.
 func ResolveBeadsDir(workDir string) string {
+	if filepath.Base(workDir) == ".beads" {
+		workDir = filepath.Dir(workDir)
+	}
 	beadsDir := filepath.Join(workDir, ".beads")
 	redirectPath := filepath.Join(beadsDir, "redirect")