Weighted tag cloud: size reflects piece count (garden#9)

Custom taxonomy template: tags sorted by count, font-size
scaled 80-200% based on weight. Heavy tags (essay: 29) are
large and violet. Light tags are small and faint. Mono font,
flex-wrapped, breathable spacing.

Replaces the flat card grid on /tags/.

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

layouts/taxonomy/tag.terms.html

@@ -0,0 +1,27 @@
+{{ define "main" }}
+<section>
+  <header>
+    <h1>Themes</h1>
+    <p data-text="dim">{{ len .Data.Terms }} threads running through the garden</p>
+  </header>
+
+  <div class="tag-cloud">
+    {{- $max := 0 -}}
+    {{- range .Data.Terms.Alphabetical -}}
+      {{- if gt .Count $max }}{{ $max = .Count }}{{ end -}}
+    {{- end -}}
+
+    {{- range .Data.Terms.ByCount -}}
+      {{- $weight := div (mul .Count 100) $max -}}
+      {{- $size := add 80 (div (mul $weight 120) 100) -}}
+      <a href="{{ .Page.RelPermalink }}"
+         class="tag-weight"
+         style="font-size: {{ $size }}%{{ if ge $weight 60 }}; color: var(--garden-dialogue){{ else if ge $weight 30 }}; color: var(--garden-text-dim){{ else }}; color: var(--garden-text-faint){{ end }}"
+         title="{{ .Count }} {{ if eq .Count 1 }}piece{{ else }}pieces{{ end }}">
+        {{ .Page.Title }}
+        <small>{{ .Count }}</small>
+      </a>
+    {{- end }}
+  </div>
+</section>
+{{ end }}