update to handle null lists (errors from get details in 0.19)

Dockerfile

@@ -20,4 +20,4 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY . .
 
 CMD ["python", "main.py"]
-#harbor.freshbrewed.science/library/vikunjamcp:0.19
+#harbor.freshbrewed.science/library/vikunjamcp:0.20

gemini-extension.json

@@ -1,6 +1,6 @@
 {
   "name": "vikunja",
-  "version": "1.0.19",
+  "version": "1.0.20",
   "mcpServers": {
     "nodeServer": {
       "command": "docker",
@@ -14,7 +14,7 @@
          "VIKUNJA_USERNAME",
          "-e",
          "VIKUNJA_PASSWORD",
-         "harbor.freshbrewed.science/library/vikunjamcp:0.19"
+         "harbor.freshbrewed.science/library/vikunjamcp:0.20"
 	  ],
       "env": {
          "VIKUNJA_URL": "$VIKUNJA_URL",

main.py

@@ -175,7 +175,7 @@ def get_task_details(task_id: int):
         if not details:
             return "No details found for this task."
 
-        # Helpers to produce compact readable strings for nested structures
+    # Helpers to produce compact readable strings for nested structures
         def join_names(items):
             if not items:
                 return "[]"
@@ -218,7 +218,10 @@ def get_task_details(task_id: int):
 
         project_id = details.get("project_id", "N/A")
         bucket_id = details.get("bucket_id", "N/A")
-        buckets = details.get("buckets", [])
+        # Coerce potentially-None fields to safe defaults so len() and iteration are safe.
+        # Vikunja may return null for some nested fields; normalize to empty lists/dicts
+        # to avoid TypeError when calling len() or iterating.
+        buckets = details.get("buckets") or []
         index = details.get("index", "N/A")
         position = details.get("position", "N/A")
 
@@ -226,15 +229,15 @@ def get_task_details(task_id: int):
         is_favorite = details.get("is_favorite", details.get("is_favourite", "N/A"))
         hex_color = details.get("hex_color", "N/A")
 
-        assignees = details.get("assignees", [])
-        attachments = details.get("attachments", [])
+        assignees = details.get("assignees") or []
+        attachments = details.get("attachments") or []
         cover_image_attachment_id = details.get("cover_image_attachment_id", "N/A")
-        comments = details.get("comments", [])
-        labels = details.get("labels", [])
-        reminders = details.get("reminders", [])
-        reactions = details.get("reactions", {})
-        related_tasks = details.get("related_tasks", {})
-        subscription = details.get("subscription", {})
+        comments = details.get("comments") or []
+        labels = details.get("labels") or []
+        reminders = details.get("reminders") or []
+        reactions = details.get("reactions") or {}
+        related_tasks = details.get("related_tasks") or {}
+        subscription = details.get("subscription") or {}
 
         result = []
         result.append(f"ID: {fetched_id}, Identifier: {identifier}, Title: {title}")