dialog: Position/Rolle + Breadcrumb-Nav + nüchterne Wortmeldungen, Footer voll-breit

- comments: author_role (Position bei OPENBUREAU) aus authors.json gespeichert/ausgeliefert
- schema: comments.author_role hinzugefügt
- dialog.js: Breadcrumb (Dialoge › Forum), volles Datum/Uhrzeit, Box→Trennlinien-Layout
- css: Footer voll-breit (Flex statt Grid), Balken zwischen Header/main/Footer entfernt

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

cms/api/src/routes/comments.js

@@ -4,7 +4,7 @@ import { profileFor, threadLocked } from '../dialog-store.js';
 
 // Dialog: flache Wortmeldungen pro Thread (= Thread-Key), optionaler Bezug.
 
-const COLS = 'id,thread,parent_id,author_name,author_avatar,body,created_at,deleted';
+const COLS = 'id,thread,parent_id,author_name,author_avatar,author_role,body,created_at,deleted';
 
 // ÖFFENTLICH: Wortmeldungen eines Threads lesen.
 export async function listComments(c) {
@@ -32,6 +32,7 @@ export async function createComment(c) {
     user_id: user.id,
     author_name: prof?.name || email.split('@')[0],
     author_avatar: prof?.avatar || null,
+    author_role: prof?.title || null,   // „Position bei OPENBUREAU" (aus data/authors.json)
     body: body.trim(),
   };
   const { data, error } = await supabase.from('comments').insert(row).select(COLS).single();