fix: Add user_alias extraction for Recent Activity dashboard (#672)

Dashboard now correctly extracts repository names from activated
repo jobs by checking for user_alias in addition to alias.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Author: jsbattig

src/code_indexer/server/services/dashboard_service.py

@@ -273,8 +273,11 @@ def _get_recent_jobs(
                 repo_name = "Unknown"
                 result = job.get("result", {}) or {}
                 if isinstance(result, dict):
-                    repo_name = result.get("alias") or result.get(
-                        "repository", "Unknown"
+                    # Check alias (golden repos), user_alias (activated repos), repository
+                    repo_name = (
+                        result.get("alias")
+                        or result.get("user_alias")
+                        or result.get("repository", "Unknown")
                     )
 
                 recent.append(