chore(config): align branch post-checkout with main's do-nothing version

Reconciles the branch's earlier export --stage hook (d2cbdc243) with main's
superseding do-nothing fix (b24a3596b) so the two merge cleanly instead of
conflicting on this file. (The hook fix is already live on main; this just keeps
the branch copy identical.)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.config/hooks/post-checkout

@@ -6,19 +6,16 @@
 # in sync with the changelog. File-level checkouts ($3 == 0) are skipped.
 # Args: <prev-HEAD> <new-HEAD> <branch-flag>.
 #
-# prev-HEAD == new-HEAD means the working-tree content did not change — a branch
-# *creation* (`git checkout -b`) or a no-op checkout. pql.db is already correct
-# for this content, so a `plan rebuild` here would only DROP uncommitted ticket
-# mutations that have not reached the changelog yet (e.g. a just-activated
-# in_progress status set right before the branch was cut). Instead, flush + stage
-# them — the same changelog capture the pre-commit hook does — so the activation
-# is durable across the checkout. A real branch *switch* (prev != new) loads a
-# different changelog, so rebuild pql.db to match the branch we moved to.
-if [ "${3:-0}" = "1" ] && command -v pql >/dev/null 2>&1; then
-    if [ "$1" = "$2" ]; then
-        pql plan export --stage >/dev/null 2>&1 || true
-    else
-        pql plan rebuild >/dev/null 2>&1 || true
-    fi
+# Only a real branch *switch* (prev-HEAD != new-HEAD) loads a different changelog
+# and needs a rebuild. On a branch *creation* (`git checkout -b`) or no-op checkout
+# (prev == new) the working-tree content is unchanged, so pql.db already holds the
+# committed state AND any uncommitted ticket mutation set just before the branch was
+# cut (e.g. a just-activated in_progress status) — so do NOTHING. A rebuild there
+# would drop that mutation; the next commit's pre-commit hook flushes it normally.
+# Doing nothing (rather than an eager `export --stage`) also avoids staging changelog
+# rows mid-checkout — those could otherwise leak onto the wrong branch when a later
+# switch rebuilds by replaying the working-tree changelog.
+if [ "${3:-0}" = "1" ] && [ "$1" != "$2" ] && command -v pql >/dev/null 2>&1; then
+    pql plan rebuild >/dev/null 2>&1 || true
     pql decisions sync >/dev/null 2>&1 || true
 fi