fix minor bugs found around the code

Author: deep1401

lab-sdk/src/lab/lab_facade.py

@@ -2230,9 +2230,17 @@ def on_save(self, args, state, control, **kwargs):
                     # Find the most recent checkpoint
                     if os.path.exists(args.output_dir):
                         checkpoints = [d for d in os.listdir(args.output_dir) if d.startswith("checkpoint-")]
+
+                        def _checkpoint_step(name: str) -> int:
+                            # Names are normally "checkpoint-<step>", but guard against
+                            # non-numeric suffixes (e.g. "checkpoint-final") so sorting
+                            # never raises ValueError.
+                            suffix = name.split("-", 1)[1] if "-" in name else ""
+                            return int(suffix) if suffix.isdigit() else -1
+
                         if checkpoints:
                             # Sort by checkpoint number
-                            checkpoints.sort(key=lambda x: int(x.split("-")[1]))
+                            checkpoints.sort(key=_checkpoint_step)
                             latest_checkpoint = checkpoints[-1]
                             checkpoint_dir = os.path.join(args.output_dir, latest_checkpoint)
 

src/renderer/components/Team/ProviderDetailsModal.tsx

@@ -384,7 +384,8 @@ export default function ProviderDetailsModal({
     if (slurmMode === 'ssh') {
       configObj.ssh_host = slurmSshHost;
       configObj.ssh_user = slurmSshUser;
-      configObj.ssh_port = parseInt(slurmSshPort, 10) || 22;
+      const parsedSshPort = parseInt(slurmSshPort, 10);
+      configObj.ssh_port = Number.isNaN(parsedSshPort) ? 22 : parsedSshPort;
       if (slurmSshKeyPath) {
         configObj.ssh_key_path = slurmSshKeyPath;
       }

src/renderer/components/User/ProviderSettingsSection.tsx

@@ -323,7 +323,6 @@ export default function ProviderSettingsSection() {
                   <Stack gap={1}>
                     {(settings.custom_sbatch_flags || '')
                       .split('\n')
-                      .filter((_, idx, arr) => arr.length === 1 || true)
                       .map((rawLine, idx, arr) => {
                         const value = rawLine;
                         return (