fix: align blocked sync warnings with exact-sync precheck

.claude/skills/sync-nowai-leaderboard/SKILL.md

@@ -49,10 +49,13 @@ From the repo root:
   (`*.powerplatform.com`), so `lib/teams.mjs` posts an **Adaptive Card** in the
   `message/attachments` envelope that template expects — not a raw MessageCard.
 - Cards: green ✅ success (with "Open staging" button), red ❌ failure, amber ⚠️
-  sanity-gate abort, blue 📋 Friday heartbeat (no changes detected — shows last
-  date `data/leaderboard.json` actually changed). No card on "no changes" Mon–Thu.
+  sanity-gate abort, amber ⚠️ blocked preflight warning (dirty worktree / wrong
+  branch / fetch failure / local main out of sync with `origin/main`), blue 📋
+  Friday heartbeat (no changes detected — shows last date
+  `data/leaderboard.json` actually changed). No card on "no changes" Mon–Thu.
 - The daily 14:00 launchd job (`~/.nowai-sync/`) loads `TEAMS_WEBHOOK_URL` from
-  `.env` and also fires a local macOS desktop notification for every outcome.
+  `.env`, posts blocked-preflight warnings through `notify-blocked.mjs`, and
+  still fires a local macOS desktop notification for every outcome.
 
 ## Logs
 

.claude/skills/sync-nowai-leaderboard/lib/blocked-notify.mjs

@@ -2,7 +2,7 @@ const REASON_LABELS = {
   'dirty-worktree': 'Worktree has uncommitted files',
   'wrong-branch': 'Current branch is not main',
   'fetch-failed': 'git fetch origin main failed',
-  'behind-or-diverged': 'Local main is behind or diverged from origin/main',
+  'behind-or-diverged': 'Local main is not exactly in sync with origin/main',
 };
 
 const FACT_LABELS = {

.claude/skills/sync-nowai-leaderboard/test/blocked-notify.test.mjs

@@ -22,6 +22,21 @@ test('buildBlockedNotification maps dirty-worktree to a warning card payload', (
   ]);
 });
 
+test('buildBlockedNotification uses exact-sync wording for local-ahead blocked runs', () => {
+  const out = buildBlockedNotification({
+    reason: 'behind-or-diverged',
+    facts: [['Branch', 'main'], ['RemoteAhead', '0'], ['LocalAhead', '1']],
+    now: new Date('2026-07-01T21:00:00Z'),
+  });
+
+  assert.deepEqual(out.facts, [
+    ['Reason', 'Local main is not exactly in sync with origin/main'],
+    ['Branch', 'main'],
+    ['RemoteAhead', '0'],
+    ['LocalAhead', '1'],
+  ]);
+});
+
 test('parseBlockedCliArgs accepts repeated --fact pairs', () => {
   const out = parseBlockedCliArgs([
     '--reason', 'behind-or-diverged',