Original changelog新增「隱藏 Codex 區塊」開關,不用 Codex 也能讓面板保持清爽
**"Hide Codex Section" menu toggle**: the menubar gained a "Hide Codex Section" option that collapses the Codex card across all 9 HTML panels and shrinks popover height per-panel. The preference persists via `NSUserDefaults` so it survives restarts. i18n keys added for all 5 locales. (PR #19, thanks @RayCHWong for the first-time contribution)
**`HTMLPanel.codex_card_height` is now a required keyword-only argument with no default**: previously the parameter had a `192.0` default, so a new panel that forgot to set its height in `panels/__init__.py` would silently fall back to the default — the Codex card would render at a height that doesn't match the rest of the panel without raising any error. Now declared as `*, codex_card_height: float` (keyword-only, no default), so any missing call site raises `TypeError` at import. All 9 existing panels already pass it by keyword and are unaffected; added `test_html_panel_requires_explicit_codex_card_height` to lock the contract.