Fix: Expose :blog-image-alt option via CLI

[furkan3ayraktar]

Problem

The :blog-image-alt option works when calling api/render directly but is silently dropped when using the CLI (bb quickblog render).

Example bb.edn configuration:

:init (def opts {:blog-title "My Blog"
                 :blog-image "assets/preview.png"
                 :blog-image-alt "My Blog preview image"})

Method	Result
(api/render opts)	✅ blog-image-alt works
bb quickblog render	❌ blog-image-alt is ignored

Root Cause

:blog-image-alt is used throughout the codebase but was never added to the CLI spec:

• api.clj → spit-index, spit-archive, spit-about, tag generation
• internal.clj → write-tag!
• api_test.clj → tested at line 503

The CLI spec only included :blog-image:

:blog-image
{:desc "Blog thumbnail image URL; see Features > Social sharing in README"
 :ref "<url>"
 :group :social-sharing}

;; :blog-image-alt was missing here

Solution

Added :blog-image-alt to the CLI spec in the :social-sharing group:

:blog-image-alt
{:desc "Alt text for blog thumbnail image"
 :ref "<text>"
 :group :social-sharing}

Now both options are passed through correctly when using bb quickblog render.

• This PR corresponds to an issue with a clear problem statement.

• I have updated the CHANGELOG.md file with a description of the addressed issue.

[borkdude]

Thanks!