[Bug]: unbranded js emitter not able to handle nested body param Spector test

[iscai-msft]

Describe the bug

Error: test/e2e/generated/parameters/body-root/src/api/bodyRootClientOperations.ts(20,61): error TS2304: Cannot find name 'bodyRootParameters'.

Reproduction

Try to implement the http-specs/parameters/body-root test

Checklist

• Follow our Code of Conduct
• Check that there isn't already an issue that request the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion.
• The provided reproduction is a minimal reproducible example of the bug.

[github-actions]

🎯 Issue Triage

The JS client emitter (unbranded) generates code with a reference to bodyRootParameters that doesn't exist, causing a TypeScript compilation error when implementing the http-specs/parameters/body-root Spector test.

Category: Bug
Area: emitter:client:js

⚠️ No reproduction provided. A minimal repro would help diagnose this issue.

🔍 Analysis

• Error: Cannot find name 'bodyRootParameters' in the generated bodyRootClientOperations.ts
• Affected component: @typespec/http-client-js (unbranded JS emitter), specifically the code generation for operations with a body parameter at the root level
• Root cause: The emitter likely fails to correctly generate or import parameter type when the body parameter is a root-level model rather than an inline/nested type. The generated operation references bodyRootParameters (a namespace/interface that was expected to be generated) but it isn't being emitted.
• Spector test: http-specs/parameters/body-root

📝 Suggested next steps

• Investigate how the emitter generates parameter types for root-level body models
• Ensure bodyRootParameters interface/namespace is properly generated or imported in the output
• Add/fix the Spector test coverage for parameters/body-root

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