Fix light theme palette - colors are mid-gray instead of light

[BharathASL]

Problem

The light palette in scss/theming/colorDefinitions.scss uses medium-to-dark gray values, making light mode look nearly identical to dark mode.

Variable	Current Value	Used As
light-100	#979898	background
light-200	#a2a3a3	background-3
light-300	#adaeae	secondary-background
light-600	#d0d0d0	secondary-text

Fix

Replace with actual light values in scss/theming/colorDefinitions.scss:

light-100: #f7f7f7,
light-200: #f0f0f0,
light-300: #e4e4e4,
light-600: #555555,
light-text: #1a1a1a,
light-brand: #a07020,
light-brand-text: #a07020,

Then recompile SCSS → CSS.