feat: split admin surface into bookmarkable pages (#138)

backend/internal/web/admin.go

@@ -18,8 +18,10 @@ type LaneReporter interface {
 	LaneStatus() latest.Status
 }
 
-// adminView is what the administrative page and the roster fragment receive.
+// adminView is the shared shell data for an administrative page and the roster
+// fragment returned after a Reader action.
 type adminView struct {
+	Page    string
 	Readers []store.ReaderSummary
 	// OwnerID travels with the roster so it can tell the owner's own row from
 	// the Readers they may act on.
@@ -84,6 +86,9 @@ type adminRoute struct {
 func (h *Handler) adminRoutes() []adminRoute {
 	return []adminRoute{
 		{"GET /admin", h.admin},
+		{"GET /admin/lanes", h.adminLanes},
+		{"GET /admin/readers", h.adminReaders},
+		{"GET /admin/series", h.adminSeries},
 		{"GET /ui/admin/lanes", h.uiLanes},
 		{"POST /readers/{id}/revoke", h.revokeReaderSessions},
 		{"POST /readers/{id}/clear-marks", h.clearReaderMarks},
@@ -116,19 +121,35 @@ func (h *Handler) requireOwner(next http.HandlerFunc) http.HandlerFunc {
 	})
 }
 
-// admin renders the owner's page: the Reader roster and Poll Lane status.
+// admin renders the Overview shell. Its data arrives in later admin tickets.
 func (h *Handler) admin(w http.ResponseWriter, r *http.Request) {
+	h.renderAdmin(w, adminView{Page: "overview"})
+}
+
+// adminLanes renders the page that hosts the live Lane fragment.
+func (h *Handler) adminLanes(w http.ResponseWriter, r *http.Request) {
+	h.renderAdmin(w, adminView{Page: "lanes", Lanes: h.lanesView()})
+}
+
+// adminReaders renders the Reader roster on its own bookmarkable page.
+func (h *Handler) adminReaders(w http.ResponseWriter, r *http.Request) {
 	readers, err := h.store.Readers()
 	if err != nil {
-		log.Printf("admin: %v", err)
+		log.Printf("admin readers: %v", err)
 		http.Error(w, "internal error", http.StatusInternalServerError)
 		return
 	}
-	h.render(w, http.StatusOK, "admin", adminView{
-		Readers: readers,
-		OwnerID: h.store.OwnerID(),
-		Lanes:   h.lanesView(),
-	})
+	h.renderAdmin(w, adminView{Page: "readers", Readers: readers, OwnerID: h.store.OwnerID()})
+}
+
+// adminSeries renders the Series shell. Its data arrives in a later admin
+// ticket.
+func (h *Handler) adminSeries(w http.ResponseWriter, r *http.Request) {
+	h.renderAdmin(w, adminView{Page: "series"})
+}
+
+func (h *Handler) renderAdmin(w http.ResponseWriter, view adminView) {
+	h.render(w, http.StatusOK, "admin", view)
 }
 
 // uiLanes answers the status block's own refresh. Only the block refreshes on a