fix(person): add i18n for show-more button and limit doc lists to 5

- Add person_show_more key (DE/EN/ES)
- Limit sent/received document lists to 5 with a translated "show more" button
- Co-correspondent chips now link to /conversations?senderId=...&receiverId=...

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/messages/de.json

@@ -125,6 +125,7 @@
 	"person_role_sender": "Gesendet",
 	"person_role_receiver": "Empfangen",
 	"person_co_correspondents_heading": "Häufige Korrespondenten",
+	"person_show_more": "+ {count} weitere anzeigen",
 
 	"conv_heading": "Konversationen",
 	"conv_subtitle": "Verfolgen Sie den Schriftverkehr zwischen zwei Personen chronologisch.",

frontend/messages/en.json

@@ -125,6 +125,7 @@
 	"person_role_sender": "Sent",
 	"person_role_receiver": "Received",
 	"person_co_correspondents_heading": "Frequent correspondents",
+	"person_show_more": "+ {count} more",
 
 	"conv_heading": "Conversations",
 	"conv_subtitle": "Follow the correspondence between two persons chronologically.",

frontend/messages/es.json

@@ -125,6 +125,7 @@
 	"person_role_sender": "Enviado",
 	"person_role_receiver": "Recibido",
 	"person_co_correspondents_heading": "Corresponsales frecuentes",
+	"person_show_more": "+ {count} más",
 
 	"conv_heading": "Conversaciones",
 	"conv_subtitle": "Siga la correspondencia entre dos personas cronológicamente.",

frontend/src/routes/persons/[id]/+page.svelte

@@ -410,7 +410,7 @@
                     onclick={() => (showAllSent = true)}
                     class="mt-3 text-xs font-bold uppercase tracking-widest text-brand-navy/50 hover:text-brand-navy transition-colors"
                 >
-                    + {sentDocuments.length - DOCS_PREVIEW_LIMIT} weitere anzeigen
+                    {m.person_show_more({ count: sentDocuments.length - DOCS_PREVIEW_LIMIT })}
                 </button>
             {/if}
         {/if}
@@ -471,7 +471,7 @@
                     onclick={() => (showAllReceived = true)}
                     class="mt-3 text-xs font-bold uppercase tracking-widest text-brand-navy/50 hover:text-brand-navy transition-colors"
                 >
-                    + {receivedDocuments.length - DOCS_PREVIEW_LIMIT} weitere anzeigen
+                    {m.person_show_more({ count: receivedDocuments.length - DOCS_PREVIEW_LIMIT })}
                 </button>
             {/if}
         {/if}