Show who signs a post and its tags, and read the blog by tag

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

landing/src/app/core/copy.ts

@@ -137,6 +137,11 @@ export interface Copy {
     published: string;
     feed: string;
     seeAll: string;
+    by: string;
+    tags: string;
+    allTags: string;
+    tagged: string;
+    noneTagged: string;
   };
   service: {
     eyebrow: string;
@@ -328,6 +333,11 @@ const es: Copy = {
     published: 'Publicado el',
     feed: 'Suscríbete por RSS',
     seeAll: 'Ver todas las novedades',
+    by: 'Por',
+    tags: 'Temas',
+    allTags: 'Todo',
+    tagged: 'Entradas sobre «{tag}»',
+    noneTagged: 'No hay entradas con esta etiqueta.',
   },
   service: {
     eyebrow: 'Servicio',
@@ -532,6 +542,11 @@ const en: Copy = {
     published: 'Published on',
     feed: 'Subscribe via RSS',
     seeAll: 'See all the news',
+    by: 'By',
+    tags: 'Topics',
+    allTags: 'Everything',
+    tagged: 'Posts about “{tag}”',
+    noneTagged: 'There are no posts with this tag.',
   },
   service: {
     eyebrow: 'Service',
@@ -736,6 +751,11 @@ const ca: Copy = {
     published: 'Publicat el',
     feed: "Subscriu-t'hi per RSS",
     seeAll: 'Veure totes les novetats',
+    by: 'Per',
+    tags: 'Temes',
+    allTags: 'Tot',
+    tagged: 'Entrades sobre «{tag}»',
+    noneTagged: 'No hi ha entrades amb aquesta etiqueta.',
   },
   service: {
     eyebrow: 'Servei',