Generate ledger OG cards per recipe at build time

[joshnesbitt]

Replaces the stale /assets/background.jpg OG fallback with a generated 1200×630 "ledger card" per recipe (the typographic Option B design):

• src/lib/og.ts — renders the card with satori + resvg in the Kitchen Ledger palette and fonts: entry number, title (auto-sized so long titles wrap to two lines), description, food/drink chip, ingredient count (leaf count of the recipe table) and logged date.
• src/pages/og/[slug].png.ts — static endpoint emitting /og/<slug>.png for every post plus /og/default.png (a centred site card) for non-post pages. Runs at build time, ~75ms per card, no headless browser needed so it works on Netlify.
• Base.astro — posts with photos still prefer the photo; everything else uses its generated card. Twitter card switched to summary_large_image.
• Static TTF weights of Source Serif 4 and IBM Plex Mono are committed under src/og/fonts/ (satori can't use variable fonts).

🤖 Generated with Claude Code

https://claude.ai/code/session_012C87BaZq5QEpM4C6XAWbRY