Reapply "Add missing admin action files and navigation links"

This reverts commit 4d515bc400.

src/app/guilds/page.tsx

@@ -34,11 +34,7 @@ export default async function GuildsPage() {
 
   return (
     <main style={{ display: "grid", gap: "1.5rem" }}>
-      <ContentCard
-        icon="🚪"
-        title={t("title")}
-        subtitle={t("subtitle")}
-      />
+      <ContentCard icon="🚪" title={t("title")} subtitle={t("subtitle")} />
 
       <ContentCard padded={guilds.length === 0}>
         {guilds.length === 0 ? (
@@ -69,9 +65,7 @@ export default async function GuildsPage() {
                   />
                 ) : null}
                 <div style={{ minWidth: 0 }}>
-                  <h3 style={{ margin: "0 0 0.25rem", fontSize: "1rem" }}>
-                    {g.name || t("unnamedGuild")}
-                  </h3>
+                  <h3 style={{ margin: "0 0 0.25rem", fontSize: "1rem" }}>{g.name || t("unnamedGuild")}</h3>
                   <p className="muted" style={{ margin: 0 }}>
                     {g.description ? excerpt(g.description, 120) : t("noDescription")}
                   </p>