[backport core/1.39] feat: gate node replacement loading on server feature flag#8940
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## Summary
Gates the node replacement store's `load()` call behind the
`node_replacements` server feature flag, so the frontend only calls
`/api/node_replacements` when the backend advertises support.
## Changes
- Added `NODE_REPLACEMENTS = 'node_replacements'` to `ServerFeatureFlag`
enum
- Added `nodeReplacementsEnabled` getter to `useFeatureFlags()`
- Added `api.serverSupportsFeature('node_replacements')` guard in
`useNodeReplacementStore.load()`
## Context
Without this guard, the frontend would attempt to fetch node
replacements from backends that don't support the endpoint, causing 404
errors.
Companion backend PR: Comfy-Org/ComfyUI#12362
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8750-feat-gate-node-replacement-loading-on-server-feature-flag-3026d73d365081ec9246d77ad88f5bdc)
by [Unito](https://www.unito.io)
---------
Co-authored-by: Jin Yi <jin12cc@gmail.com>
Co-authored-by: Alexander Brown <drjkl@comfy.org>
Co-authored-by: Claude <noreply@anthropic.com>
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2 participants
Backport of #8750 to
core/1.39Automatically created by backport workflow.
┆Issue is synchronized with this Notion page by Unito