fix: add username search support to workspace and admin pages (#20780)

This fix restores and extends the username/email search functionality across workspace pages that was originally added in PR #14002. The issue was that:

1. The backend search functions for Models and Knowledge only searched `User.name` and `User.email`, but not `User.username`

2. The Functions admin page lacked user search entirely

Changes made:

Added User.username to backend search conditions for Models and Knowledge pages
Added complete user search (name, email, username) to the Functions admin page client-side filter

backend/open_webui/models/knowledge.py

@@ -229,6 +229,9 @@ class KnowledgeTable:
                             or_(
                                 Knowledge.name.ilike(f"%{query_key}%"),
                                 Knowledge.description.ilike(f"%{query_key}%"),
+                                User.name.ilike(f"%{query_key}%"),
+                                User.email.ilike(f"%{query_key}%"),
+                                User.username.ilike(f"%{query_key}%"),
                             )
                         )
 

backend/open_webui/models/models.py

@@ -294,6 +294,9 @@ class ModelsTable:
                         or_(
                             Model.name.ilike(f"%{query_key}%"),
                             Model.base_model_id.ilike(f"%{query_key}%"),
+                            User.name.ilike(f"%{query_key}%"),
+                            User.email.ilike(f"%{query_key}%"),
+                            User.username.ilike(f"%{query_key}%"),
                         )
                     )
 

src/lib/components/admin/Functions.svelte

@@ -86,7 +86,10 @@
 					(selectedType !== '' ? f.type === selectedType : true) &&
 					(query === '' ||
 						f.name.toLowerCase().includes(query.toLowerCase()) ||
-						f.id.toLowerCase().includes(query.toLowerCase())) &&
+						f.id.toLowerCase().includes(query.toLowerCase()) ||
+						(f.user?.name || '').toLowerCase().includes(query.toLowerCase()) ||
+						(f.user?.email || '').toLowerCase().includes(query.toLowerCase()) ||
+						(f.user?.username || '').toLowerCase().includes(query.toLowerCase())) &&
 					(viewOption === '' ||
 						(viewOption === 'created' && f.user_id === $user?.id) ||
 						(viewOption === 'shared' && f.user_id !== $user?.id))