bggpipe export: the library as static pages for any site

Eric wanted the library on his blog; the spec always called games.json
"the seed for a future web frontend." The new export stage renders it
as self-contained static pages — an index with search, one page per
game with facts, chips, the owner's edition and the description — that
drop into any static host (Hugo's static/ folder included). No server,
no build step, no external requests from the published pages.

Public pages carry obligations a localhost app doesn't. Cover art is
downloaded once from BGG's CDN instead of hotlinked (0.3s between
fetches — a guest, not a crawler; part-file writes so a failure never
leaves a truncated image; re-runs skip what exists, so the export is
idempotent and resumable like every stage). The footer shows a
Powered-by-BGG badge per BGG's public-app policy — text by default,
upgraded to the official logo when the owner saves it from their
registered-application page as data/powered-by-bgg.png — plus the
trademark attribution. And one privacy rule, tested: shelf photos are
never exported; they picture the inside of the owner's home. Covers
and hand-added local art only, per Eric's explicit choice.

Slugs are deterministic and collision-stable (two editions of one game
get -2 suffixes in sorted-key order) so re-exports keep every URL.
Descriptions un-double-encode BGG's entities. First real run: 136
pages, 254 covers, 64MB, live on the blog's static directory.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016jXZFSTZQKzAC8fqpWSz9g

CLAUDE.md

@@ -14,6 +14,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 | 4 | `bggpipe diff` | diff approved matches against the existing BGG collection | working |
 | 5 | `bggpipe upload` | add games via a logged-in Playwright session | working — all browser flows verified live 2026-08-06 (62 adds + 36 version updates landed) |
 | 6 | `bggpipe enrich` | fetch full game/version metadata into `games.json` | working |
+| + | `bggpipe export` | render the library as self-contained static pages (covers downloaded, never hotlinked; shelf photos never included; Powered-by-BGG badge slot) | working |
 
 Full design lives in `docs/spec.md` (read it before changing pipeline semantics); the upload-stage walkthrough is in `docs/bgg-upload-flow.md`.