v2.15.0

Signed and notarized. Recommended: download the .dmg, open
it, and drag Readr into Applications. The .zip is the same app
for scripted installs.

What's Changed

• Gate ChatGPT card and key-console links off the iOS build by @Anusree-J in #61
• Release a drag-to-Applications DMG alongside the zip by @Anusree-J in #62
• Shelf card alignment, Ask conversations with rendered answers, raised note markers by @Anusree-J in #63
• Group provider settings by vendor, not connection method by @Anusree-J in #64
• Launch readiness: answer past the book, plain-language errors, in-app feedback, book colours by @Anusree-J in #65

Full Changelog: v2.14.1...v2.15.0