🔑Retrofitting Firebase auth and a JSONkeeper-compatible API onto codh-mirror so IIIF Curation editing actually works — walking back the earlier `won't work` claim
A follow-up to the earlier codh-mirror post, which explicitly called Firebase auth and the curation save backend out of scope. This time I went back and wired them up: reusing a Firebase project (Authorized domains and sign-in providers), discovering that FirebaseUI 3.x's default redirect signInFlow silently fails on GitHub Pages subpaths, swapping the curationJsonExportUrl in 9 places across five tools, and pointing the iiif-curation-manager submenu links at the sibling tools via relative URLs. Server-side details (Cloudflare Workers + D1 as mainline and PythonAnywhere Flask as upstream-faithful fallback) live in two separate posts; this one covers only the codh-mirror client side.
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