feat(settings): add Codex update button (brew/npm)

[shaw-baobao]

This PR adds a simple "Update" action next to "Run doctor" in Settings → Codex.

What it does

• Adds a new Tauri command codex_update that updates Codex based on detected install method:
  • Homebrew cask: brew upgrade --cask codex
  • Homebrew formula: brew upgrade codex
  • npm global: if @openai/codex is installed, runs npm install -g @openai/codex@latest
  • Otherwise returns method: "unknown" with a helpful message.
• UI shows update result details (method, package, version before/after, output, error details).

Why

• CodexMonitor already validates the Codex CLI via "Run doctor", but didn’t provide an in-app way to upgrade Codex. This adds a minimal, best-effort upgrade flow aligned with the official Codex installation methods.

Testing

• npm install
• npm test
• cargo check (in src-tauri)

Notes

• The update logic is best-effort and intentionally does not attempt to support every possible installation method beyond brew/npm.

[Dimillian]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 0f0cc74532

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[shaw-baobao]

Follow-up: fixed in commit 97ecd9e. App now passes the codexUpdate handler from useAppSettingsController into SettingsView (settingsProps.onRunCodexUpdate), so the Update button uses the real Tauri update path.

[Dimillian]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 88c0c39ec9

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[shaw-baobao]

Addressed the new Codex feedback in commit 3b33998: detection now treats missing brew/npm binaries as not-installed during method probing, so the flow no longer aborts early and can fall back to npm/unknown.

[Dimillian]

@codex review

[chatgpt-codex-connector]

💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 3b33998f8d

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review".

If Codex has suggestions, it will comment; otherwise it will react with 👍.

Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".

[shaw-baobao]

Addressed the latest Codex feedback in commit 3887895: the pre-update codex version check is now best-effort (non-fatal), so update method detection and upgrade can proceed even when the configured codex binary/path is invalid.