agentHost: update Codex to 0.146.0

[Giuspepe]

Stack

1. agentHost: update Codex to 0.146.0 #328962 — Codex 0.146.0 update (this PR)
2. sessions: add per-session Codex model providers #328461 — per-session Codex model providers

Merge this PR first. #328461 is based directly on this branch and remains a draft.

Summary

• update the root development and packaged Agent SDK Codex dependencies from 0.142.0 to 0.146.0
• regenerate the checked-in app-server protocol client from Codex 0.146.0
• adapt approval policy, dynamic audio output, account, hook, and token-usage handling to the updated schema

Why

The per-session model-provider work needs Codex 0.146.0 for the current ChatGPT subscription model inventory. Landing the dependency and generated protocol changes separately keeps the feature PR focused and reviewable.

Reviewer Notes

• generated app-server files were produced only with npm run codex:gen-protocol
• the protocol generator itself is unchanged
• this PR is the base of the per-session model-provider stack

Validation

• npm run codex:check-protocol
• npm run typecheck-client
• npm run transpile-client
• packaged Codex lockfile verified with npm ci
• complete mainline Codex Agent Host suite: 174 passing
• repository pre-commit hygiene hook

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