Issue 1058

# Codex selector now exposes pinned effort variants

Capture environment: local dashboard at `http://127.0.0.1:3001/cliproxy`, light theme, Codex provider editor, Model Config tab.

What changed

The selector now offers real codex model variants like `-high` and `-xhigh`.

Why it matters

The dashboard can now emit the exact suffixed model IDs that runtime code already understands.

Review cue

Look at the opened model picker: suffixed entries appear as first-class options with pinned-effort badges.

Targeted evidence

## Codex provider editor model picker

The open selector shows canonical rows plus generated pinned variants such as `gpt-5.3-codex-high`, `gpt-5.3-codex-xhigh`, and `gpt-5.4-xhigh`.