feat(render): rebuild the derived #+TODO header on merge refresh

A same-source refresh updates issue subtrees in place and keeps retained dirty subtrees the merge skips, so the #+TODO line has to stay honest across it -- a refresh can surface a new state, and a kept heading's keyword must still be declared. pearl--update-derived-todo-header scans the final displayed buffer (every LINEAR-ID heading's TODO keyword + :LINEAR-STATE-TYPE: drawer), unions that with the fetched teams' states, and rewrites the line via pearl--derive-todo-line. Scanning the final buffer rather than the fetched issue list is what covers the retained subtrees. A legacy heading with no state-type drawer is classified by org-done-keywords. pearl--merge-query-result calls it after the merge, beside the source-header update.

The merge and integration test setups stub pearl--team-states so the gather stays network-free.

1 files changed, 9 insertions, 5 deletions

diff --git a/tests/test-pearl-merge.el b/tests/test-pearl-merge.el
index e55127b..ba73cc6 100644
--- a/tests/test-pearl-merge.el
+++ b/tests/test-pearl-merge.el
@@ -38,11 +38,15 @@
   `(let ((pearl-state-to-todo-mapping
           '(("Todo" . "TODO") ("In Progress" . "IN-PROGRESS") ("Done" . "DONE")))
          (org-todo-keywords '((sequence "TODO" "IN-PROGRESS" "|" "DONE"))))
-     (with-temp-buffer
-       (insert ,content)
-       (org-mode)
-       (goto-char (point-min))
-       ,@body)))
+     ;; the merge's derived-header rebuild gathers team states synchronously;
+     ;; stub it so the merge tests stay network-free (the header then derives
+     ;; from the displayed issues' own states)
+     (cl-letf (((symbol-function 'pearl--team-states) (lambda (_team-id) nil)))
+       (with-temp-buffer
+         (insert ,content)
+         (org-mode)
+         (goto-char (point-min))
+         ,@body))))
 
 (defun test-pearl-merge--issue (id title desc)
   "A normalized issue plist with ID, TITLE, and DESC for merge input."