fix: avoid large option lists in node previews

[loulanyue]

Summary

Prevent inert node previews from materializing full combo option lists, which freezes node search when LoadImage exposes a very large input file list.

Changes

• What: Keep only the value displayed by a combo widget in preview-only node data instead of retaining every option.
• Tests: Add a 10,000-option LoadImage regression case and update existing preview expectations.

Review Focus

The real canvas node and its dropdown options are unchanged. Only the non-interactive preview data is reduced to the selected, default, or first combo value.

Fixes Comfy-Org/ComfyUI#14872

Validation

• Related preview/search/widget tests: 89 passed
• pnpm typecheck: passed
• pnpm lint: passed (3 unrelated existing warnings)
• pnpm format:check: passed
• pnpm knip: passed
• Repository pre-commit and pre-push hooks: passed

Disclosure: Codex assisted with source tracing and implementation. I reviewed the diff and ran the checks listed above.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 96eb5d34-bfc8-4172-b3c8-ae11284b3c3c

📥 Commits

Reviewing files that changed from the base of the PR and between 832d48e and a41741e.

📒 Files selected for processing (2)

• src/renderer/extensions/vueNodes/components/LGraphNodePreview.test.ts
• src/renderer/extensions/vueNodes/components/LGraphNodePreview.vue

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📝 Walkthrough

Walkthrough

COMBO widget previews now resolve their displayed value from provided values, defaults, or the first option, and reduce available preview options to that value. Tests cover provided values, missing values, and large option lists.

Changes

COMBO preview behavior

Layer / File(s)	Summary
Resolve COMBO preview values and validate options src/renderer/extensions/vueNodes/components/LGraphNodePreview.vue, src/renderer/extensions/vueNodes/components/LGraphNodePreview.test.ts	COMBO previews use the provided value, default, or first option and expose it as the sole option; tests cover missing values and large option lists.

Estimated code review effort: 2 (Simple) | ~10 minutes

Possibly related PRs

• Comfy-Org/ComfyUI_frontend#13322: Updates COMBO preview value and option derivation in the same component and test suite.

Suggested reviewers: christian-byrne

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Important

Pre-merge checks failed

Please resolve all errors before merging. Addressing warnings is optional.

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
End-To-End Regression Coverage For Fixes	❓ Inconclusive	PR description suggests a bug fix, but the PR title/commit subjects are unavailable here, so the fail condition cannot be verified.	Please provide the PR title and commit subjects (or the full changed-file/commit metadata) so the regression-test check can be applied.

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly matches the main change: reducing large combo option lists in node previews.
Description check	✅ Passed	The description covers Summary, Changes, Review Focus, and validation details, which is mostly complete for the template.
Linked Issues check	✅ Passed	The preview-only combo reduction and regression test address the reported /object_info search freeze in issue #14872.
Out of Scope Changes check	✅ Passed	The diff appears limited to the preview behavior and related tests, with no unrelated changes introduced.
Adr Compliance For Entity/Litegraph Changes	✅ Passed	No ADR 0003/0008 patterns appear: the PR only changes preview data derivation/tests, with no entity mutation, new graph/node methods, ECS components, or extension callbacks.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[loulanyue]

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