feat(web): refine workspace sidebar navigation

[youngbeom-shin]

Summary

• polish workspace sidebar navigation icons, badges, collapsed logo, hover and tooltip states
• align context/list add button styling and remove sidebar layout transition
• refine settings page grouping and dark-mode segmented controls

Validation

• PATH=/Users/shenyongfan/.nvm/versions/node/v22.13.0/bin:/Users/shenyongfan/.codex/tmp/arg0/codex-arg01WJTMZ:/Users/shenyongfan/.rvm/gems/ruby-3.2.2/bin:/Users/shenyongfan/.rvm/gems/ruby-3.2.2@global/bin:/Users/shenyongfan/.rvm/rubies/ruby-3.2.2/bin:/Users/shenyongfan/.qwenpaw/bin:/Users/shenyongfan/.local/lib/csgclaw/v0.2.5/csgclaw/bin:/Users/shenyongfan/.local/bin:/Users/shenyongfan/.langflow/uv:/Users/shenyongfan/.npm-global/bin:/Users/shenyongfan/.codeium/windsurf/bin:/Users/shenyongfan/.rbenv/shims:/Users/shenyongfan/miniconda3/bin:/Users/shenyongfan/miniconda3/condabin:/Users/shenyongfan/.local/bin:/opt/homebrew/bin:/opt/homebrew/sbin:/usr/local/bin:/System/Cryptexes/App/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/local/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/bin:/var/run/com.apple.security.cryptexd/codex.system/bootstrap/usr/appleinternal/bin:/usr/local/go/bin:/Users/shenyongfan/.rvm/bin:/usr/local/bin:/Users/shenyongfan/go/bin:/Applications/ChatGPT.app/Contents/Resources scripts/web-pnpm.sh typecheck

[jialudev]

LGTM

[RussellLuo]

LGTM