fix: Normalize base_time to HH:mm:ss format

HTML time input sends HH:mm, but calculateStagger expects HH:mm:ss.

Signed-off-by: Claude (Chronicler #61) <claude@firefrostgaming.com>

services/arbiter-3.0/src/routes/admin/scheduler.js

@@ -141,9 +141,14 @@ router.post('/reorder-servers', async (req, res) => {
 // POST /admin/scheduler/update-config - Update node config
 router.post('/update-config', async (req, res) => {
     try {
-        const { node, base_time, interval_minutes } = req.body;
+        let { node, base_time, interval_minutes } = req.body;
         const updatedBy = req.session?.user?.username || 'Unknown';
         
+        // Normalize time to HH:mm:ss format
+        if (base_time && !base_time.includes(':00', 3)) {
+            base_time = base_time + ':00';
+        }
+        
         await db.query(
             `UPDATE global_restart_config 
              SET base_time = $1, interval_minutes = $2, updated_at = NOW(), updated_by = $3