Fix scheduled series launch: read schedule from draft, apply to draft+published, check every minute, local-time picker; v2.8.1

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

server.js

@@ -228,12 +228,12 @@ Promise.all([
       console.error('[study-digest] failed to schedule weekly digest:', err)
     })
 
-    // Check for a scheduled series transition every hour
+    // Check for a scheduled series transition every minute
     setInterval(() => {
       runScheduledSeriesTransition().catch(err => {
         console.error('[series-scheduler] error:', err)
       })
-    }, 60 * 60 * 1000)
+    }, 60 * 1000)
     runScheduledSeriesTransition().catch(err => {
       console.error('[series-scheduler] error:', err)
     })