fix(guardian) Dont hard error on feature disable (#18795)

## Summary 
This shouldn't error for now

## Test plan
- [x] Updated unit test

.github/blob-size-allowlist.txt

@@ -7,3 +7,4 @@ codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.schemas.json
 codex-rs/app-server-protocol/schema/json/codex_app_server_protocol.v2.schemas.json
 codex-rs/tui/tests/fixtures/oss-story.jsonl
 codex-rs/tui_app_server/tests/fixtures/oss-story.jsonl
+codex-rs/tui/src/app.rs

codex-rs/core/src/guardian/review_session.rs

@@ -770,8 +770,8 @@ pub(crate) fn build_guardian_review_session_config(
             )
         })?;
         if guardian_config.features.enabled(feature) {
-            anyhow::bail!(
-                "guardian review session requires `features.{}` to be disabled",
+            warn!(
+                "guardian review session could not disable `features.{}`; continuing with the feature enabled",
                 feature.key()
             );
         }

codex-rs/core/src/guardian/tests.rs

@@ -1721,7 +1721,7 @@ async fn guardian_review_session_config_disables_mcp_apps_and_plugins() {
 }
 
 #[tokio::test]
-async fn guardian_review_session_config_rejects_pinned_collab_feature() {
+async fn guardian_review_session_config_allows_pinned_disabled_feature() {
     let mut parent_config = test_config().await;
     parent_config.features = ManagedFeatures::from_configured(
         parent_config.features.get().clone(),
@@ -1734,18 +1734,17 @@ async fn guardian_review_session_config_rejects_pinned_collab_feature() {
     )
     .expect("managed features");
 
-    let err = build_guardian_review_session_config_for_test(
+    let guardian_config = build_guardian_review_session_config_for_test(
         &parent_config,
         /*live_network_config*/ None,
         "active-model",
         /*reasoning_effort*/ None,
     )
-    .expect_err("guardian config should fail when collab is pinned on");
+    .expect("guardian config should continue when a disabled feature is pinned on");
 
-    assert!(
-        err.to_string()
-            .contains("guardian review session requires `features.multi_agent` to be disabled")
-    );
+    assert!(guardian_config.features.enabled(Feature::Collab));
+    assert!(guardian_config.mcp_servers.get().is_empty());
+    assert!(!guardian_config.include_apps_instructions);
 }
 
 #[tokio::test]