fix(cli): harden ACP/Codex event handling

[Lihengwannafly]

What / Why

Make CLI event handling more robust across ACP/Codex streams (missing turn ids, out-of-order tool events, inconsistent payload shapes) and prevent duplicated “reasoning” text caused by repeated delta notifications.

Changes

• Harden ACP parsing/conversion (audience/kind/tool-name fallbacks; ordering + trailing update handling).
• Codex app-server integration hardening (config + remote launcher guardrails; safer handling of terminal lifecycle events without turn_id).
• App-server event conversion improvements, including deduping identical consecutive deltas to avoid duplicated tokens in the UI.
• Add/extend Vitest coverage for the above behaviors.

Tests

• cd cli && bun run test
• cd cli && bun run typecheck

[github-actions]

Findings

• No issues found.

Questions

• For the consecutive-delta dedupe in cli/src/codex/utils/appServerEventConverter.ts:321, do we have an upstream guarantee that identical consecutive deltas are duplicates (not legitimate repeated tokens/output)? If not, should we gate dedupe on a sequence/offset field instead of content equality?

Summary

• No issues found in the diff.

Testing

• Not run (automation)