fix: archive browser model filter is suffix-only and drops matching models (#1709)

routes/session_routes.py

@@ -618,7 +618,12 @@ def setup_session_routes(session_manager: SessionManager, config: dict, webhook_
                 safe_search = search.replace('%', r'\%').replace('_', r'\_')
                 q = q.filter(DbSession.name.ilike(f"%{safe_search}%", escape='\\'))
             if model:
-                q = q.filter(DbSession.model.ilike(f"%{model}"))
+                # Contains match (mirrors the name filter above). The old
+                # f"%{model}" was a SUFFIX-only match, so filtering by "gpt-4"
+                # dropped "gpt-4o" and over-matched on shared suffixes; it also
+                # left LIKE wildcards in the user value unescaped.
+                safe_model = model.replace('%', r'\%').replace('_', r'\_')
+                q = q.filter(DbSession.model.ilike(f"%{safe_model}%", escape='\\'))
             total = q.count()
             sort_map = {
                 "recent": DbSession.updated_at.desc(),