astro-icon requires explicit icon registration — these two were used
in PipelineStrip.astro but missing from the include list, causing
SSR render failures in production.
SSR the notebook list in Astro frontmatter (eliminating the client-side
loading spinner). Add hero section with oscilloscope graticule background,
4-column feature highlights, and a React island gallery with category
filter pills, tag search, and grouped/flat view modes.
Wire astro-seo-meta for OG, Twitter Card, and canonical tags on all
pages. Add Satori + resvg dynamic OG image endpoints at /og/[id].png
with branded dark-theme cards. Replace inline SVGs with zero-JS
astro-icon rendering. SSR fetches use 5s AbortController timeout and
shared ID validation across all dynamic routes.
Switch from query-param routing (/notebook/?id=X) to Astro dynamic
routes (/notebook/rc-lowpass-filter). Add @astrojs/node adapter with
output: 'server' for on-demand route handling.
Fix formatEng/formatAxisValue crash on null values passed by uPlot
axis tick formatters. Add CORS origin for port 4322.
