- Remove pin/unpin and auto-hide hover mechanism (isPinned, isHovering,
hoverTimeout, showSidebar/hideSidebar, updateAutoHideState, etc.)
- Remove global show_folder_sidebar setting (SettingsManager,
PageControls, recipes, backend default)
- Simplify sidebar visibility to a single per-page toggle:
· Dedicated chevron-left button in header to hide sidebar
· Edge indicator (chevron-right) to restore when hidden
· No dropdown, no hover area, no pin button
- Add _migrateOldSettings() to convert old sidebarPinned and
show_folder_sidebar states to per-page sidebarDisabled
- Fix sidebar flicker on page load: CSS defaults to off-screen,
JS explicitly sets .visible or .hidden-by-setting
- Remove obsolete CSS classes: auto-hide, hover-active, collapsed
- Remove i18n keys: pinSidebar, unpinSidebar, moreOptions
- Update test mocks for the new initialize() interface
- Add ``` button in sidebar header with dropdown menu
- Add "Hide sidebar on this page" option with per-page localStorage state
- Show edge indicator (14px chevron) on left when hidden per-page
- Show brief toast notification when hiding
- Fix container margin not resetting when sidebar is per-page hidden
- Add i18n translations for all 10 locales
- Created zh-CN.json and zh-TW.json for Simplified and Traditional Chinese translations respectively.
- Added comprehensive test suite in test_i18n.py to validate JSON structure, server-side i18n functionality, and translation completeness across multiple languages.