fix: handle user-owned repos in get_labels (skip org labels)

The get_labels tool was failing with 404 for user-owned repositories
because it always queried /api/v1/orgs/{owner}/labels, which only
works for organizations.

Changes:
- labels.py: Check is_org_repo() before fetching org labels
- gitea_client.py: Same fix in _resolve_label_ids()
- test_labels.py: Added tests for both org and user-owned repos

Fixes #61

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mcp-servers/gitea/mcp_server/gitea_client.py

@@ -110,8 +110,14 @@ class GiteaClient:
 
     def _resolve_label_ids(self, label_names: List[str], owner: str, repo: str) -> List[int]:
         """Convert label names to label IDs."""
-        org_labels = self.get_org_labels(owner)
-        repo_labels = self.get_labels(f"{owner}/{repo}")
+        full_repo = f"{owner}/{repo}"
+
+        # Only fetch org labels if repo belongs to an organization
+        org_labels = []
+        if self.is_org_repo(full_repo):
+            org_labels = self.get_org_labels(owner)
+
+        repo_labels = self.get_labels(full_repo)
         all_labels = org_labels + repo_labels
         label_map = {label['name']: label['id'] for label in all_labels}
         label_ids = []