Show the publication after the feed name, and link feeds to Miniflux for admins

Readers see "Feed · Publication" on the issue, article, public and RSS
pages and in the EPUB index and chapter headers; the publication is the
page's site name, else its domain, and is dropped when it would repeat
the feed's title. Admins get the feed name linked to its Miniflux page.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YWmCpUojfHXhSZ2129Z7Nv

src/epub/chapters.rs

@@ -11,7 +11,7 @@ use crate::comments;
 use crate::html::{text_escape, to_xhtml};
 use crate::images;
 use crate::types::{
-    BehindThePaper, Edition, ImageAsset, Issue, NearMiss, Pick, SocialRef, Vote,
+    Article, BehindThePaper, Edition, ImageAsset, Issue, NearMiss, Pick, SocialRef, Vote,
     WORLD_BRIEFING_SECTION,
 };
 use crate::world;
@@ -363,6 +363,13 @@ pub fn section_names(issue: &Issue) -> Vec<String> {
     names
 }
 
+fn source_line(article: &Article) -> String {
+    match article.publication_label() {
+        Some(publication) => format!("{} · {publication}", article.feed_title),
+        None => article.feed_title.clone(),
+    }
+}
+
 /// "In This Issue": per section, each article's title, source, reading time and
 /// summary, linked to its chapter (§3.10).
 pub fn render_in_this_issue(issue: &Issue) -> Result<Chapter, EpubError> {
@@ -375,7 +382,7 @@ pub fn render_in_this_issue(issue: &Issue) -> Result<Chapter, EpubError> {
             .map(|pick| IndexEntry {
                 href: article_href(pick),
                 title: pick.article.title.clone(),
-                source: pick.article.feed_title.clone(),
+                source: source_line(&pick.article),
                 reading_minutes: pick.article.reading_minutes(),
                 summary: summary_for(issue, pick).unwrap_or_default().to_string(),
                 why: pick.why.clone(),
@@ -437,7 +444,7 @@ pub fn render_article(
     hmac_secret: Option<&str>,
 ) -> Result<Chapter, EpubError> {
     let article = &pick.article;
-    let mut meta_parts = vec![article.feed_title.clone()];
+    let mut meta_parts = vec![source_line(article)];
     if let Some(date) = published_display(pick) {
         meta_parts.push(date);
     }
@@ -879,6 +886,44 @@ mod tests {
         assert_xml_ok(&chapter.xhtml);
     }
 
+    #[test]
+    fn article_sources_include_distinct_publications_without_repeating_the_feed() {
+        let mut issue = issue();
+        issue.lineup.picks[0].article.publication = Some("Example Journal".into());
+        issue.lineup.picks[1].article.publication = Some("Example Feed".into());
+
+        let index = render_in_this_issue(&issue).unwrap();
+        assert!(
+            index
+                .xhtml
+                .contains("Example Feed · Example Journal &#183; 6 min read")
+        );
+        assert!(!index.xhtml.contains("Example Feed · Example Feed"));
+
+        let article = render_article(
+            &issue,
+            &issue.lineup.picks[0],
+            &[],
+            Edition::Standard,
+            "https://daily.hallada.net",
+            None,
+        )
+        .unwrap();
+        assert!(article.xhtml.contains("Example Feed · Example Journal"));
+
+        let matching = render_article(
+            &issue,
+            &issue.lineup.picks[1],
+            &[],
+            Edition::Standard,
+            "https://daily.hallada.net",
+            None,
+        )
+        .unwrap();
+        assert!(matching.xhtml.contains("Example Feed"));
+        assert!(!matching.xhtml.contains("Example Feed · Example Feed"));
+    }
+
     #[test]
     fn article_chapter_has_header_body_and_footer() {
         let issue = issue();