[Bug] Anthropic API Error: Missing server_tool_use block for tool_result

**Bug Description**
I stopped being able to interact with a session, with error "API Error: 400 messages.15.content.0: unexpected `tool_use_id` found in `advisor_tool_result` blocks: srvtoolu_01DcAD2oDB6fdQXk4XdWShsW. Each `advisor_tool_result` block must have a corresponding `server_tool_use` block before it."

**Environment Info**
- Platform: darwin
- Terminal: tmux
- Version: 2.1.276
- Feedback ID: 875ad5b9-85c7-4936-bd34-9ba6189b137b

**Errors**
```json
[{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.15.content.0: unexpected `tool_use_id` found in `advisor_tool_result` blocks: srvtoolu_01DcAD2oDB6fdQXk4XdWShsW. Each `advisor_tool_result` block must have a corresponding `server_tool_use` block before it.\"},\"request_id\":\"req_011CfBH7dj3SKASZJr9C9Urs\"}\n at generate (/$bunfs/root/chunk-hd9xm3q1.js:11:14235)\n at makeRequest (/$bunfs/root/chunk-hd9xm3q1.js:51:8033)\n at processTicksAndRejections (native:7:39)","timestamp":"2026-09-18T17:12:41.186Z"}]
```

Start by reproducing the failure using Claude Code 2.1.276 on darwin in tmux, using feedback ID 875ad5b9-85c7-4936-bd34-9ba6189b137f as context. Trace how advisor_tool_result blocks are assembled before the Anthropic API request and compare them with the required server_tool_use blocks. Done means the reported session can continue without the 400 validation error.

Written by the indexing model from the issue text.