Add usage-based business plan types (#15934)

## Summary
- add `self_serve_business_usage_based` and `enterprise_cbp_usage_based`
to the public/internal plan enums and regenerate the app-server + Python
SDK artifacts
- map both plans through JWT login and backend rate-limit payloads, then
bucket them with the existing Team/Business entitlement behavior in
cloud requirements, usage-limit copy, tooltips, and status display
- keep the earlier display-label remap commit on this branch so the new
Team-like and Business-like plans render consistently in the UI

## Testing
- `just write-app-server-schema`
- `uv run --project sdk/python python
sdk/python/scripts/update_sdk_artifacts.py generate-types`
- `just fix -p codex-protocol -p codex-login -p codex-core -p
codex-backend-client -p codex-cloud-requirements -p codex-tui -p
codex-tui-app-server -p codex-backend-openapi-models`
- `just fmt`
- `just argument-comment-lint`
- `cargo test -p codex-protocol
usage_based_plan_types_use_expected_wire_names`
- `cargo test -p codex-login usage_based`
- `cargo test -p codex-backend-client usage_based`
- `cargo test -p codex-cloud-requirements usage_based`
- `cargo test -p codex-core usage_limit_reached_error_formats_`
- `cargo test -p codex-tui plan_type_display_name_remaps_display_labels`
- `cargo test -p codex-tui remapped`
- `cargo test -p codex-tui-app-server
plan_type_display_name_remaps_display_labels`
- `cargo test -p codex-tui-app-server remapped`
- `cargo test -p codex-tui-app-server
preserves_usage_based_plan_type_wire_name`

## Notes
- a broader multi-crate `cargo test` run still hits unrelated existing
guardian-approval config failures in
`codex-rs/core/src/config/config_tests.rs`

codex-rs/tui/src/status/helpers.rs

@@ -94,14 +94,23 @@ pub(crate) fn compose_account_display(
         CoreAuthMode::ApiKey => Some(StatusAccountDisplay::ApiKey),
         CoreAuthMode::Chatgpt | CoreAuthMode::ChatgptAuthTokens => {
             let email = auth.get_account_email();
-            let plan = plan
-                .map(|plan_type| title_case(format!("{plan_type:?}").as_str()))
-                .or_else(|| Some("Unknown".to_string()));
+            let plan = plan.map(plan_type_display_name);
+            let plan = plan.or_else(|| Some("Unknown".to_string()));
             Some(StatusAccountDisplay::ChatGpt { email, plan })
         }
     }
 }
 
+pub(crate) fn plan_type_display_name(plan_type: PlanType) -> String {
+    if plan_type.is_team_like() {
+        "Business".to_string()
+    } else if plan_type.is_business_like() {
+        "Enterprise".to_string()
+    } else {
+        title_case(format!("{plan_type:?}").as_str())
+    }
+}
+
 pub(crate) fn format_tokens_compact(value: i64) -> String {
     let value = value.max(0);
     if value == 0 {
@@ -187,3 +196,49 @@ pub(crate) fn title_case(s: &str) -> String {
     let rest: String = chars.as_str().to_ascii_lowercase();
     first.to_uppercase().collect::<String>() + &rest
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use codex_core::auth::CodexAuth;
+    use pretty_assertions::assert_eq;
+
+    #[test]
+    fn plan_type_display_name_remaps_display_labels() {
+        let cases = [
+            (PlanType::Free, "Free"),
+            (PlanType::Go, "Go"),
+            (PlanType::Plus, "Plus"),
+            (PlanType::Pro, "Pro"),
+            (PlanType::Team, "Business"),
+            (PlanType::SelfServeBusinessUsageBased, "Business"),
+            (PlanType::Business, "Enterprise"),
+            (PlanType::EnterpriseCbpUsageBased, "Enterprise"),
+            (PlanType::Enterprise, "Enterprise"),
+            (PlanType::Edu, "Edu"),
+            (PlanType::Unknown, "Unknown"),
+        ];
+
+        for (plan_type, expected) in cases {
+            assert_eq!(plan_type_display_name(plan_type), expected);
+        }
+    }
+
+    #[test]
+    fn compose_account_display_uses_remapped_plan_label() {
+        let auth_manager =
+            AuthManager::from_auth_for_testing(CodexAuth::create_dummy_chatgpt_auth_for_testing());
+
+        let display = compose_account_display(
+            auth_manager.as_ref(),
+            Some(PlanType::SelfServeBusinessUsageBased),
+        );
+        assert!(matches!(
+            display,
+            Some(StatusAccountDisplay::ChatGpt {
+                email: None,
+                plan: Some(ref plan),
+            }) if plan == "Business"
+        ));
+    }
+}