diff --git a/app/routes/saved_filters.py b/app/routes/saved_filters.py
index a3be787..a74304d 100644
--- a/app/routes/saved_filters.py
+++ b/app/routes/saved_filters.py
@@ -30,7 +30,7 @@ def _validate_entity_type(entity_type: str) -> None:
     if entity_type not in ENTITY_MODELS:
         from fastapi import HTTPException
         valid = sorted(ENTITY_MODELS.keys())
-        raise HTTPException(400, detail={
+        raise HTTPException(422, detail={
             "detail": f"Invalid entity_type: {entity_type}",
             "code": "invalid_entity_type",
             "valid_types": valid,
diff --git a/app/routes/saved_views.py b/app/routes/saved_views.py
index 8f5d62c..fe93cac 100644
--- a/app/routes/saved_views.py
+++ b/app/routes/saved_views.py
@@ -30,7 +30,7 @@ def _validate_entity_type(entity_type: str) -> None:
     if entity_type not in ENTITY_MODELS:
         from fastapi import HTTPException
         valid = sorted(ENTITY_MODELS.keys())
-        raise HTTPException(400, detail={
+        raise HTTPException(422, detail={
             "detail": f"Invalid entity_type: {entity_type}",
             "code": "invalid_entity_type",
             "valid_types": valid,
diff --git a/frontend/src/__tests__/shell/AppShell.test.tsx b/frontend/src/__tests__/shell/AppShell.test.tsx
index 8bbcd55..f2abcfd 100644
--- a/frontend/src/__tests__/shell/AppShell.test.tsx
+++ b/frontend/src/__tests__/shell/AppShell.test.tsx
@@ -11,6 +11,7 @@ vi.mock('@/api/hooks', () => ({
   useLogout: () => ({ mutateAsync: vi.fn(), isPending: false }),
   useSwitchTenant: () => ({ mutateAsync: vi.fn(), isPending: false }),
   useGlobalSearch: () => ({ data: [], isLoading: false }),
+  useCurrentUser: () => ({ data: null, isLoading: false }),
 }));
 
 vi.mock('@/api/hooks/workspaces', () => ({
diff --git a/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/results.json b/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/results.json
new file mode 100644
index 0000000..52eb751
--- /dev/null
+++ b/node_modules/.vite/vitest/da39a3ee5e6b4b0d3255bfef95601890afd80709/results.json
@@ -0,0 +1 @@
+{"version":"4.1.10","results":[[":frontend/src/__tests__/shell/AppShell.test.tsx",{"duration":0,"failed":true}]]}
\ No newline at end of file