Replaces the fee[dB]ack text wordmark in the #v3-brand sidebar header with the exported PNG logo (static/v3/brand/feedback-logo-light.png, 664x165). Sized width:100% + height:auto so it fits the 256px sidebar's content width (~208px inside the p-6). Updated both the no-JS fallback (index.html) and the shell.js boot render. Inline style avoids introducing a new Tailwind utility (constitution P-II).
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>