fix(submissions): handle null blogPostId in populate query

- Changed populate to use options object with strictPopulate: false
- Allows submissions without blogPostId (standalone packages) to be returned
- Fixes 500 error on /api/submissions endpoint
- Le Monde package should now be visible in UI after server restart

.claude/session-state.json

@@ -43,8 +43,8 @@
       "last_deliberation": null
     },
     "FileEditHook": {
-      "timestamp": "2025-10-23T20:52:52.632Z",
-      "file": "/home/theflow/projects/tractatus/public/js/admin/blog-validation.js",
+      "timestamp": "2025-10-23T20:54:49.723Z",
+      "file": "/home/theflow/projects/tractatus/src/controllers/submissions.controller.js",
       "result": "passed"
     },
     "FileWriteHook": {
@@ -58,25 +58,25 @@
     "tokens": 30000
   },
   "alerts": [],
-  "last_updated": "2025-10-23T20:52:52.632Z",
+  "last_updated": "2025-10-23T20:54:49.723Z",
   "initialized": true,
   "framework_components": {
     "CrossReferenceValidator": {
       "message": 0,
       "tokens": 0,
-      "timestamp": "2025-10-23T20:53:10.672Z",
-      "last_validation": "2025-10-23T20:53:10.671Z",
-      "validations_performed": 643
+      "timestamp": "2025-10-23T20:55:48.702Z",
+      "last_validation": "2025-10-23T20:55:48.702Z",
+      "validations_performed": 653
     },
     "BashCommandValidator": {
       "message": 0,
       "tokens": 0,
       "timestamp": null,
-      "last_validation": "2025-10-23T20:53:10.673Z",
-      "validations_performed": 310,
+      "last_validation": "2025-10-23T20:55:48.703Z",
+      "validations_performed": 319,
       "blocks_issued": 37
     }
   },
-  "action_count": 310,
+  "action_count": 319,
   "auto_compact_events": []
 }

src/controllers/submissions.controller.js

@@ -82,7 +82,11 @@ async function getSubmissions(req, res) {
     if (publicationId) query.publicationId = publicationId;
 
     const submissions = await SubmissionTracking.find(query)
-      .populate('blogPostId', 'title slug')
+      .populate({
+        path: 'blogPostId',
+        select: 'title slug',
+        options: { strictPopulate: false } // Allow null blogPostId
+      })
       .populate('createdBy', 'email')
       .sort({ submittedAt: -1, createdAt: -1 })
       .limit(parseInt(limit, 10))