tui: preserve migration picker for stacked flow

codex-rs/tui/src/lib.rs

@@ -130,6 +130,8 @@ mod diff_model;
 mod diff_render;
 mod exec_cell;
 mod exec_command;
+#[allow(dead_code)]
+mod external_agent_config_migration;
 mod external_editor;
 mod file_search;
 mod frames;

codex-rs/tui/src/snapshots/codex_tui__external_agent_config_migration__tests__external_agent_config_migration_prompt.snap

@@ -0,0 +1,23 @@
+---
+source: tui/src/external_agent_config_migration.rs
+expression: rendered
+---
+  > External agent config detected
+  We found settings from another agent that you can add to this project.
+  Select what to import
+  Home
+    [x] Migrate /Users/alex/.claude/settings.json into /Users/alex/.codex/con…
+
+  Project: /workspace/project
+    [x] Migrate enabled plugins from .claude/settings.json (4 marketplaces, 6…
+        • acme-tools: deployer, formatter, +1 more
+        • team-marketplace: asana
+        • debug: sample
+        • +1 more marketplaces
+    [x] Migrate CLAUDE.md to AGENTS.md
+
+  Selected 3 of 3 item(s).
+    1. Proceed with selected                                                  
+    2. Skip for now                                                           
+    3. Don't ask again                                                        
+  Use ↑/↓ to move, space to toggle, 1/2/3 to choose, a/n for all/none

codex-rs/tui/src/snapshots/codex_tui__external_agent_config_migration__tests__external_agent_config_migration_prompt_windows.snap

@@ -0,0 +1,24 @@
+---
+source: tui/src/external_agent_config_migration.rs
+expression: rendered
+---
+
+  > External agent config detected
+  We found settings from another agent that you can add to this project.
+  Select what to import
+  Home
+    [x] Migrate /Users/alex/.claude/settings.json into /Users/alex/.codex/con…
+
+  Project: C:\workspace\project
+    [x] Migrate enabled plugins from .claude/settings.json (4 marketplaces, 6…
+        • acme-tools: deployer, formatter, +1 more
+        • team-marketplace: asana
+        • debug: sample
+        • +1 more marketplaces
+    [x] Migrate CLAUDE.md to AGENTS.md
+
+  Selected 3 of 3 item(s).
+    1. Proceed with selected                                                  
+    2. Skip for now                                                           
+    3. Don't ask again                                                        
+  Use ↑/↓ to move, space to toggle, 1/2/3 to choose, a/n for all/none