## Changes
- Replace MUI default blue-tinted dark background with neutral grays
(#151518 for default, #1c1c21 for paper/cards)
- Remove decorative blue/purple SVG blob overlay from dark mode background
## Benefits
- Dark mode now has a clean, neutral gray appearance instead of a blue tint
## Changes
- Add global theme overrides for MUI DatePicker components (MuiPickersPopper,
MuiDateCalendar, MuiPickersCalendarHeader, MuiDayCalendar, MuiPickersDay)
- Remove inline popper styling from CreateMaintenance component as it's now
handled globally
- Calendar popup now properly adapts to both light and dark themes using
theme palette tokens
## Changes
- Remove unused semantic color groups (successSecondary, map, chatbot)
- Remove unused properties from primary and tertiary groups
- Inline accent.darker usage in globalTheme.js
- Fix greeting component crash with persisted Redux state
- Fix MonitorGrid key prop warning
## Details
Theme simplification:
- Reduced constants.js from 355 to 291 lines
- Removed 3 unused semantic color groups
- Removed 6 unused properties (contrastBorder, contrastBorderDisabled, etc.)
- Inlined darken() call for accent hover states
Bug fixes:
- Added null-safe selectors in greeting.jsx for state.ui.greeting
- Added initialization check in setGreeting reducer for older persisted state
- Fixed key prop in MonitorGrid to handle both _id and id
- Removed unused console.log and Grid2 import
- Move MuiSelect vertical alignment from FilterHeader component to globalTheme.js
- Ensures consistent vertical alignment for all Select components application-wide
- Removes component-specific styling in favor of theme-level consistency
- Addresses reviewer feedback to make this a theme-level change
Components already with custom Select styling will continue to work as local styles override theme styles.