Make homepage study card admin-editable with NEW tag controls

data/study-users.json

@@ -0,0 +1,13 @@
+{
+  "users": [
+    {
+      "id": "e43e7217-be69-49c6-a65d-edd0e7745884",
+      "username": "teststudent",
+      "passwordHash": "3311701f9972d1c6a0933d5ccd71f83c526e24fe491334f4a9cc705407e6f7e7",
+      "createdAt": "2026-05-12T15:48:03.143Z",
+      "updatedAt": "2026-05-12T15:51:17.052Z",
+      "lastLoginAt": "2026-05-12T15:51:17.052Z"
+    }
+  ],
+  "updatedAt": "2026-05-12T15:51:17.053Z"
+}