feat: Add Claude Code architecture analysis posts (KR/EN) and refactor category pages

- Add Korean insight post analyzing Claude Code's leaked source map architecture
- Add English translation of the same analysis
- Add diagram images (architecture, agentic loop, compaction, security layers)
- Add insights.png cover image
- Refactor insights.md: filter by 'Insights' category, remove dead code, DRY up
- Refactor paper-summaries.md: remove unused variable, DRY up
- Refactor paper-reviews.md: exclude Insights/Summaries categories with dedicated pages
- Fix categories.html: remove redundant replace calls
- Fix post.html: conditionally render author line

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: bits-bytes-nn

_layouts/post.html

@@ -6,7 +6,7 @@
     <div class="scrim {% if page.cover %}has-cover{% endif %}">
       <header class="post-header">
         <h1 class="title">{{ page.title }}</h1>
-        <p class="info">by <strong>{{ page.author }}</strong></p>
+        {% if page.author %}<p class="info">by <strong>{{ page.author }}</strong></p>{% endif %}
       </header>
     </div>
   </div>

_posts/2026-03-31-claude-code-architecture-analysis.md

@@ -17,7 +17,6 @@
       {% assign cat_display = cat_display | append: " " | append: capitalized_word %}
     {% endif %}
   {% endfor %}
-  {% assign cat_display = cat_display | replace: "language", "Language" | replace: "models", "Models" | replace: "machine", "Machine" | replace: "learning", "Learning" %}
   <h2 id="{{cat}}">{{ cat_display }}</h2>
   {% for desc in site.descriptions %}
     {% if desc.cat == cat %}

_posts/2026-03-31-claude-code-source-map-leak-analysis.md

@@ -6,12 +6,11 @@ main_nav: true
 nav_order: 4
 ---
 
-{% assign thoughts_posts = site.posts | where: "categories", "thoughts" %}
-{% if site.categories['Thoughts'].size > 0 %}
-  <h2 id="insights">Insights</h2>
-  <p class="desc"><em>Personal reflections, thoughts on the future of AI, industry observations, and philosophical perspectives on technology.</em></p>
+<h2 id="insights">Insights</h2>
+
+{% if site.categories['Insights'].size > 0 %}
   <ul class="posts-list">
-  {% for post in site.categories['Thoughts'] %}
+  {% for post in site.categories['Insights'] %}
     <li>
       <strong>
         <a href="{{ post.url | prepend: site.baseurl }}">{{ post.title }}</a>
@@ -21,8 +20,6 @@ nav_order: 4
   {% endfor %}
   </ul>
 {% else %}
-  <h2 id="insights">Insights</h2>
-  <p class="desc"><em>Personal reflections, thoughts on the future of AI, industry observations, and philosophical perspectives on technology.</em></p>
   <p><em>Insights Brewing... Personal musings and reflections on AI/ML are coming soon. Stay tuned for philosophical insights and industry observations.</em></p>
 {% endif %}
 <br>