feat(save): write synced baselines for structured fields

Save-model v2 reconciles a field by diffing its live value against a baseline last synced from Linear, but the structured fields (priority, state, assignee, labels) only stored their current value — there was nothing to diff against. The renderer now writes a synced baseline beside each: LINEAR-PRIORITY (the numeric priority), LINEAR-STATE-ID-SYNCED, LINEAR-ASSIGNEE-ID-SYNCED, and LINEAR-LABEL-IDS / LINEAR-LABEL-IDS-SYNCED (the live and baseline id sets, with LINEAR-LABELS staying display-only names).

At fetch, live equals baseline, so nothing reads dirty on a fresh issue. The merge refresh re-renders changed subtrees through the same renderer, so baselines advance there too, and a retained dirty subtree is left untouched.

1 files changed, 25 insertions, 0 deletions

diff --git a/tests/test-pearl-format.el b/tests/test-pearl-format.el
index 1e9fa53..a642b53 100644
--- a/tests/test-pearl-format.el
+++ b/tests/test-pearl-format.el
@@ -68,6 +68,31 @@
       (should (string-match-p "^:LINEAR-TITLE-SHA256: +[0-9a-f]\\{64\\}$" out))
       (should (string-match-p "^:END:$" out)))))
 
+;;; synced baselines for structured fields (save-model v2)
+
+(ert-deftest test-pearl-format-issue-writes-synced-baselines ()
+  "The renderer writes a synced baseline per structured field, equal to its live value at fetch."
+  (test-pearl--with-default-mapping
+    (let ((out (pearl--format-issue-as-org-entry (test-pearl--norm-full))))
+      ;; priority: numeric baseline beside the cookie
+      (should (string-match-p "^:LINEAR-PRIORITY: +2$" out))
+      ;; state: live id and synced baseline both present and equal
+      (should (string-match-p "^:LINEAR-STATE-ID: +state-1$" out))
+      (should (string-match-p "^:LINEAR-STATE-ID-SYNCED: +state-1$" out))
+      ;; assignee: live id and synced baseline equal
+      (should (string-match-p "^:LINEAR-ASSIGNEE-ID: +user-1$" out))
+      (should (string-match-p "^:LINEAR-ASSIGNEE-ID-SYNCED: +user-1$" out))
+      ;; labels: live id set and synced baseline equal, in fetched order
+      (should (string-match-p "^:LINEAR-LABEL-IDS: +lbl-1 lbl-2$" out))
+      (should (string-match-p "^:LINEAR-LABEL-IDS-SYNCED: +lbl-1 lbl-2$" out)))))
+
+(ert-deftest test-pearl-format-issue-bare-empty-baselines ()
+  "Null/missing structured fields render empty id baselines without error."
+  (test-pearl--with-default-mapping
+    (let ((out (pearl--format-issue-as-org-entry (test-pearl--norm-bare))))
+      (should (string-match-p "^:LINEAR-LABEL-IDS: +$" out))
+      (should (string-match-p "^:LINEAR-LABEL-IDS-SYNCED: +$" out)))))
+
 (ert-deftest test-pearl-format-issue-description-in-body-not-property ()
   "The description renders as body text, not a :DESCRIPTION: property."
   (test-pearl--with-default-mapping