Show citation count on research page

Display NumCitations from the scholar cache alongside year for each
article. The data was already being fetched — it just wasn't shown
in the templates. Shows as "N cited" when the count is non-zero.

Updated all three themes (default, minimal, forest) and the legacy
research.html template.

Closes #513

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

Author: compscidr

themes/default/templates/page_research.html

@@ -22,7 +22,8 @@ <h1>{{ .page.Title }}</h1>
           <a href="{{.ScholarURL}}">{{.Title}}</a> <br/>
           {{.Authors}} <br/>
         </div>
-        <div class="col">{{.Year}}</div>
+        <div class="col-2">{{.Year}}</div>
+        <div class="col-2">{{ if .NumCitations }}{{ .NumCitations }} cited{{ end }}</div>
       </div>
     {{end}}
   </div>

themes/default/templates/research.html

@@ -17,7 +17,8 @@ <h1>Research and Publications</h1>
           <a href="{{.ScholarURL}}">{{.Title}}</a> <br/>
           {{.Authors}} <br/>
         </div>
-        <div class="col">{{.Year}}</div>
+        <div class="col-2">{{.Year}}</div>
+        <div class="col-2">{{ if .NumCitations }}{{ .NumCitations }} cited{{ end }}</div>
       </div>
     {{end}}
   </div>

themes/forest/templates/page_research.html

@@ -16,7 +16,8 @@ <h1 style="color: #1c2e1c;">{{ .page.Title }}</h1>
           <a href="{{.ScholarURL}}" style="color: #2d5a27;">{{.Title}}</a> <br/>
           <span style="color: #7a937a;">{{.Authors}}</span> <br/>
         </div>
-        <div class="col" style="color: #7a937a;">{{.Year}}</div>
+        <div class="col-2" style="color: #7a937a;">{{.Year}}</div>
+        <div class="col-2" style="color: #7a937a;">{{ if .NumCitations }}{{ .NumCitations }} cited{{ end }}</div>
       </div>
     {{end}}
   </div></div>

themes/minimal/templates/page_research.html

@@ -16,7 +16,8 @@ <h1>{{ .page.Title }}</h1>
           <a href="{{.ScholarURL}}">{{.Title}}</a> <br/>
           {{.Authors}} <br/>
         </div>
-        <div class="col">{{.Year}}</div>
+        <div class="col-2">{{.Year}}</div>
+        <div class="col-2">{{ if .NumCitations }}{{ .NumCitations }} cited{{ end }}</div>
       </div>
     {{end}}
   </div>