I can display the posts in a topic, albeit imperfectly

ui/amcontext.go

@@ -62,6 +62,7 @@ type AmContext interface {
 	ReplaceUser(*database.User)
 	SaveSession() error
 	SubRender(string) ([]byte, error)
+	SubRender2(string, map[string]any) ([]byte, error)
 	SetCommunityContext(string) error
 	SetLeftMenu(string)
 	SetLoginCookie(string)
@@ -320,6 +321,27 @@ func (c *amContext) SubRender(name string) ([]byte, error) {
 	return buf.Bytes(), err
 }
 
+func (c *amContext) SubRender2(name string, vals map[string]any) ([]byte, error) {
+	view, err := views.GetTemplate(name)
+	if err != nil {
+		log.Errorf("unable to load template \"%s\": %v", name, err)
+		return nil, err
+	}
+	newmap := make(jet.VarMap)
+	for k, v := range c.VarMap() {
+		newmap.Set(k, v)
+	}
+	for k, v := range vals {
+		newmap.Set(k, v)
+	}
+	buf := new(bytes.Buffer)
+	err = view.Execute(buf, newmap, c)
+	if err != nil {
+		log.Errorf("template \"%s\" failed subrender exec: %v", name, err)
+	}
+	return buf.Bytes(), err
+}
+
 /* SetCommunityContext establishes the community context from a (ID or alias) parameter.
  * Parameters:
  *     param - String parameter selecting the community.

ui/views/posts.jet

@@ -74,17 +74,12 @@
 
         <!-- Messages -->
         <div class="space-y-6 mb-8">
-            {{ post_userName := "" }}
-            {{ post_text := "" }}
-            {{ post_overrideLine := "" }}
-            {{ post_overrideLink := "" }}
-            {{ range i, post_cur := posts }}
-                {{ post_userName = post_getUserName(post_cur, .) }}
-                {{ post_text = post_getText(post_cur, .) }}
-                {{ post_overrideLine = post_getOverrideLine(post_cur, .) }}
-                {{ post_overrideLink = post_getOverrideLink(post_cur, post_topicPermalink) }}
-                {{ .SubRender("singlepost.jet") | raw }}
-                {{ if pin == post_cur.Num }}<hr/>{{ end }}
+            {{ m := map("foo", "bar") }}
+            {{ range i, p := posts }}
+                {{ m = map("post_cur", p, "post_userName", post_getUserName(p, .), "post_text", post_getText(p, .),
+                           "post_overrideLine", post_getOverrideLine(p, .), "post_overrideLink", post_getOverrideLink(p, post_topicPermalink)) }}
+                {{ .SubRender2("singlepost.jet", m) | raw }}
+                {{ if pin == p.Num }}<hr/>{{ end }}
             {{ end }}
         </div>