fix: secure upload/download paths, default filter, status enum compare, upload validation

templates/status.html

@@ -4,7 +4,7 @@
 <h2>Job: {{ job.job_id }}</h2>
 
 <div class="job-info">
-    <p><strong>Status:</strong> <span class="status-{{ job.status|lower }}">{{ job.status }}</span></p>
+    <p><strong>Status:</strong> <span class="status-{{ job.status.name|lower }}">{{ job.status.name }}</span></p>
     <p><strong>Video:</strong> {{ job.video_path }}</p>
     <p><strong>Progress:</strong> {{ "%.0f"|format(job.progress * 100) }}%</p>
     {% if job.current_model %}
@@ -52,7 +52,7 @@
 </table>
 {% endif %}
 
-{% if job.status == "RUNNING" or job.status == "PENDING" %}
+{% if job.status.name == "RUNNING" or job.status.name == "PENDING" %}
 <div class="auto-refresh">
     <p>Status will auto-refresh...</p>
 </div>