Fix CI, Giscus, remove duplicates and Einstein placeholders

- Enable Giscus comments (General category)
- Disable Medium RSS external source (posts now local)
- Add ImageMagick install to CI workflow
- Remove Einstein placeholder publication preview images

Co-Authored-By: Claude Sonnet 4.6 <[email protected]>

Author: jsaunders909

.github/workflows/deploy.yml

@@ -33,6 +33,8 @@ jobs:
         valueFile: '_config.yml'
         propertyPath: 'giscus.repo'
         value: ${{ github.repository }}
+    - name: Install ImageMagick 🖼️
+      run: sudo apt-get install -y imagemagick
     - name: Install and Build 🔧
       run: |
         pip3 install --upgrade jupyter

_config.yml

@@ -123,10 +123,10 @@ related_blog_posts:
 # Giscus comments (RECOMMENDED)
 # Follow instructions on https://giscus.app/ to setup for your repo to fill out the information below.
 giscus:
-  repo:                          # <your-github-user-name>/<your-github-repo-name>
-  repo_id:                       # leave empty or specify your repo_id (see https://giscus.app/)
-  category: Comments             # name of the category under which discussions will be created
-  category_id:                   # leave empty or specify your category_id (see https://giscus.app/)
+  repo: jsaunders909/jsaunders909.github.io
+  repo_id: R_kgDOGT7F7w
+  category: General              # name of the category under which discussions will be created
+  category_id: DIC_kwDOGT7F784C4sSA
   mapping: title                 # identify discussions by post title
   strict: 1                      # use strict identification mode
   reactions_enabled: 1           # enable (1) or disable (0) emoji reactions
@@ -143,8 +143,6 @@ disqus_shortname: al-folio # put your disqus shortname
 # If you have blog posts published on medium.com or other external sources,
 # you can display them in your blog by adding a link to the RSS feed.
 external_sources:
-  - name: medium.com
-    rss_url: https://medium.com/@jacksaunders909/feed
 
 # -----------------------------------------------------------------------------
 # Collections