Add weeknote for January 4-10, 2026 and fix list template excerpts

- New weeknote covering the week's shipped work, reading, gaming, cooking, and observations
- Fixed list templates to show description excerpts consistently across main index and weeknotes page
- Updated layouts/_default/list.html to check .Params.description before .Description
- Updated layouts/weeknotes/single.html to display full excerpts with reading time

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

layouts/weeknotes/single.html

@@ -13,9 +13,25 @@
       {{ range (where .Site.RegularPages "Params.tags" "intersect" (slice "weeknotes")).ByDate.Reverse }}
         <li class="posts-list-item">
           <a class="posts-list-item-title" href="{{ .Permalink }}">{{ .Title }}</a>
+          <span class="posts-list-item-description">
+            <div>
+              {{ if .Params.preview }}
+                <br />{{ .Params.preview }}<br />(more inside)<br /><br />
+              {{ else if .Params.description }}
+                <br />{{ .Params.description }}<br />(more inside)<br /><br />
+              {{ else if .Description }}
+                <br />{{ .Description }}<br />(more inside)<br /><br />
+              {{ else }}
+                {{ .Summary }}
+              {{ end }}
+            </div>
+          </span>
           <span class="posts-list-item-description">
             {{ partial "icon.html" (dict "ctx" $ "name" "calendar") }}
             {{ .PublishDate.Format "Jan 2, 2006" }}
+            <span class="posts-list-item-separator">-</span>
+            {{ partial "icon.html" (dict "ctx" $ "name" "clock") }}
+            {{ .ReadingTime }} min read
           </span>
         </li>
       {{ end }}