feat(web): filter tabs and recent strip by status bucket

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

backend/web.go

@@ -145,38 +145,51 @@ func (h *webHandler) index(w http.ResponseWriter, r *http.Request) {
 	h.render(w, http.StatusOK, "app", view)
 }
 
+// filterBookmarks returns the subset keep reports true for, preserving order.
+// It always returns a non-nil slice so an empty tab renders its empty state.
+func filterBookmarks(all []Bookmark, keep func(Bookmark) bool) []Bookmark {
+	out := []Bookmark{}
+	for _, b := range all {
+		if keep(b) {
+			out = append(out, b)
+		}
+	}
+	return out
+}
+
 // buildListView loads the list once and derives both the tab-filtered items and
-// the recent strip from it. The strip always reflects overall recency, not the
-// active tab, so it is built before filtering.
+// the recent strip from it.
+//
+// Archived and finished series appear in their own tab and nowhere else — not
+// in All, not in Updated, not in Favourites, and not in the recent strip. An
+// archived favourite therefore shows only under Archived: Favourites means
+// "favourites I am currently reading".
 func (h *webHandler) buildListView(tab string) (listView, error) {
 	all, err := h.store.List() // already ordered updated_at DESC
 	if err != nil {
 		return listView{}, err
 	}
+	reading := filterBookmarks(all, func(b Bookmark) bool { return b.Status == statusReading })
 
-	recent := all
+	// The strip reflects overall reading recency, not the active tab.
+	recent := reading
 	if len(recent) > recentCount {
 		recent = recent[:recentCount]
 	}
 
-	items := all
+	var items []Bookmark
 	switch tab {
 	case "fav":
-		items = []Bookmark{}
-		for _, b := range all {
-			if b.Favorite {
-				items = append(items, b)
-			}
-		}
+		items = filterBookmarks(reading, func(b Bookmark) bool { return b.Favorite })
 	case "new":
-		items = []Bookmark{}
-		for _, b := range all {
-			if b.HasNewChapter() {
-				items = append(items, b)
-			}
-		}
+		items = filterBookmarks(reading, func(b Bookmark) bool { return b.HasNewChapter() })
+	case "archived":
+		items = filterBookmarks(all, func(b Bookmark) bool { return b.Status == statusArchived })
+	case "finished":
+		items = filterBookmarks(all, func(b Bookmark) bool { return b.Status == statusFinished })
 	default:
 		tab = "all"
+		items = reading
 	}
 	return listView{Tab: tab, Recent: recent, Items: items}, nil
 }