Flow editor crash: TypeError: Cannot read property 'localeCompare' of undefined — iOS app + local web UI (firmware 13.2.0)

After updating to firmware 13.2.0 (2026-05-21), the flow editor crashes on both the iOS app and the local web UI at `192.168.1.x`.

**Symptoms:**

- iOS Homey app: crash dialog when opening most flows, with stack trace pointing to `FlowEditorCardGroups` at `main.jsbundle:829148:30`

- Local web UI: most flows simply don’t appear in the list at all

- Flows continue executing correctly — this is display/editing only

**Error:** `TypeError: Cannot read property ‘localeCompare’ of undefined`

**Stack trace component:** `FlowEditorCardGroups`

**Steps to reproduce:** Open any flow in the iOS app or via http://[homey-ip] after updating to 13.2.0.

**What I’ve ruled out:** App offload + fresh reinstall from App Store didn’t help. Ran a full server-side audit — all flow card IDs exist in the registry, all titles are strings, all device/zone references are valid. The data is clean. This is a rendering-layer bug, not a data issue.

**Device:** Homey Pro (Early 2026), firmware 13.2.0, iOS app latest

Homey app bugs should be reported here: Support | Homey