fix: include _noop tool in activeTools for LiteLLM proxy compatibility

[danielfrg]

Summary

• Fix compaction failing with LiteLLM proxies when message history contains tool calls

Problem

When using /compact on sessions with LiteLLM proxy providers, the request fails with:

litellm.UnsupportedParamsError: Bedrock doesn't support tool calling without `tools=` param specified

Root Cause

The _noop dummy tool was being added correctly to satisfy LiteLLM's requirement, but it was filtered out from activeTools on line 211 of llm.ts, so it was never actually sent in the API request.

Fix

Remove _noop from the activeTools filter so it gets included in requests when needed.

[github-actions]

Thanks for your contribution!

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[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Potential Related PR Found:

• PR fix: handle dangling tool_use blocks for LiteLLM proxy compatibility #8497: "fix: handle dangling tool_use blocks for LiteLLM proxy compatibility"
  fix: handle dangling tool_use blocks for LiteLLM proxy compatibility #8497

Why it's related: This PR also addresses LiteLLM proxy compatibility issues with tool calling. While PR #9912 focuses specifically on the _noop tool not being included in activeTools, PR #8497 handles dangling tool_use blocks for the same provider. Both are tackling different aspects of LiteLLM proxy compatibility with tool handling.

[rekram1-node]

Thanks!