style(visual-fidelity): pages-public — batches A,D,F,G,H

- about.vue: promote h3 → h2 on circle headings (h1→h2→h2→h2)
- coming-soon.vue: font-weight 700 → 600
- members/[id].vue: inline circle badge → <CircleBadge/>; hero size 42→36
- community-guidelines.vue: padding + font-size off-scale snaps
- board.vue: loading/empty padding 60→64
- series/index.vue, join.vue: padding off-scale snaps

app/pages/community-guidelines.vue

@@ -309,7 +309,7 @@ useHead({
 }
 .guidelines-section ul li {
   position: relative;
-  padding: 2px 0 2px 18px;
+  padding: 2px 0 2px 16px;
   font-size: 13px;
   color: var(--text-dim);
   line-height: 1.7;
@@ -365,7 +365,7 @@ useHead({
   font-family: "Brygada 1918", serif;
   font-style: italic;
   color: var(--text-bright);
-  font-size: 15px;
+  font-size: 16px;
   margin-top: 12px;
 }