feat(core): persist runtime workspace state

codex-rs/protocol/src/protocol.rs

@@ -110,6 +110,8 @@ pub const USER_MESSAGE_BEGIN: &str = "## My request for Codex:";
 pub struct TurnEnvironmentSelection {
     pub environment_id: String,
     pub cwd: AbsolutePathBuf,
+    #[serde(default)]
+    pub workspace_roots: Vec<AbsolutePathBuf>,
 }
 
 #[derive(Debug, Clone, PartialEq)]
@@ -1925,6 +1927,8 @@ pub struct ThreadSettingsSnapshot {
     #[ts(optional)]
     pub active_permission_profile: Option<ActivePermissionProfile>,
     pub cwd: AbsolutePathBuf,
+    #[serde(default)]
+    pub workspace_roots: Vec<AbsolutePathBuf>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub reasoning_effort: Option<ReasoningEffortConfig>,
     #[serde(skip_serializing_if = "Option::is_none")]