feat(web): overview page with verdict line and stats doors (#143)

backend/internal/web/admin.go

@@ -25,6 +25,8 @@ type adminView struct {
 	SeriesList seriesListView
 	// Detail is the per-Series page data; zero on every other page.
 	Detail seriesDetailView
+	// Overview is the landing page data; zero on every other page.
+	Overview overviewView
 }
 
 // adminRoute pairs a route pattern with its handler so the route list and the
@@ -76,9 +78,17 @@ func (h *Handler) requireOwner(next http.HandlerFunc) http.HandlerFunc {
 	})
 }
 
-// admin renders the Overview shell. Its data arrives in later admin tickets.
+// admin renders the Overview landing page: a verdict line, a stats block
+// where every figure is a door into the list it counts, and the per-Site
+// library shape table — all read from the database, never from a poller.
 func (h *Handler) admin(w http.ResponseWriter, r *http.Request) {
-	h.renderAdmin(w, adminView{Page: "overview"})
+	view, err := h.overviewView()
+	if err != nil {
+		log.Printf("admin overview: %v", err)
+		http.Error(w, "internal error", http.StatusInternalServerError)
+		return
+	}
+	h.renderAdmin(w, adminView{Page: "overview", Overview: view})
 }
 
 // adminReaders renders the Reader roster on its own bookmarkable page.