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/tools/labels.py

@@ -27,20 +27,27 @@ class LabelTools:
         self.gitea = gitea_client
 
     async def get_labels(self, repo: Optional[str] = None) -> Dict[str, List[Dict]]:
-        """Get all labels (org + repo). Repo must be 'owner/repo' format."""
+        """Get all labels (org + repo if org-owned, repo-only if user-owned)."""
         loop = asyncio.get_event_loop()
 
         target_repo = repo or self.gitea.repo
         if not target_repo or '/' not in target_repo:
             raise ValueError("Use 'owner/repo' format (e.g. 'org/repo-name')")
 
-        org = target_repo.split('/')[0]
-
-        org_labels = await loop.run_in_executor(
+        # Check if repo belongs to an organization or user
+        is_org = await loop.run_in_executor(
             None,
-            lambda: self.gitea.get_org_labels(org)
+            lambda: self.gitea.is_org_repo(target_repo)
         )
 
+        org_labels = []
+        if is_org:
+            org = target_repo.split('/')[0]
+            org_labels = await loop.run_in_executor(
+                None,
+                lambda: self.gitea.get_org_labels(org)
+            )
+
         repo_labels = await loop.run_in_executor(
             None,
             lambda: self.gitea.get_labels(target_repo)