VS Code extension drops turn-scoped items and recent chat history during active thread #35304

2026-07-25 08:38:05.527 [warning] [CodexMcpConnection] cli:
dropping turn-scoped item for unknown turn id `<redacted>`
item_id="exec-<redacted>"

2026-07-25 08:38:05.528 [error] [CodexMcpConnection] cli:
codex_app_server_protocol::protocol::thread_history:
dropping turn-scoped item for unknown turn id `<redacted>`

codex_analytics::reducer:
dropping turn tool count update: missing turn state
thread_id=<redacted> turn_id=<redacted> item_id="exec-<redacted>"

2026-07-25 08:38:05.534 [error]
Item not found in turn state itemId=exec-<redacted>

2026-07-25 08:39:27.102 [warning] [IpcClient]
Received broadcast but no handler is configured
method=thread-read-state-changed

### What steps can reproduce the bug?

Open VS Code with the Codex extension signed in.
Work in a long-running thread with tool calls and multiple turns.
Continue working for an extended period.
Observe that recent conversation or tool items can disappear from the visible thread.
Check the VS Code Extension Host output.

### What is the expected behavior?

The extension should retain and render all turns and tool results belonging to the active thread. If state recovery is needed, it should rehydrate the missing turn instead of silently dropping associated items.

### Additional information

This was observed on macOS while working in an active long-running thread with tool calls. I did not manually edit or delete Codex session/state files.

I can provide additional sanitized VS Code Extension Host logs if needed.

Related issue: #14812