refac: UI refactorization 1) Leverage webpacks ability to import some scss sheets globally to omit importing sheets in every component 2) making "sidebar" collapsible in a 2d way 3) fixed flickering user menu

# documentation
**/README*
**/docs
**/*.md

# backend binary
cmd/gemma/gemma

# Dependency directories
**/node_modules

# local dotenv environment variables file
client/.env.local

# Tags tables
**/TAGS