ui: trend panel + range selector on host repo page

internal/server/http/ui_repo_trend.go

@@ -0,0 +1,25 @@
+// ui_repo_trend.go — htmx fragment endpoint for the repo-page
+// trend chart. Returns just the chart partial wrapped in
+// <div id="repo-trend-chart"> so htmx can outerHTML-swap it.
+//
+//	GET /hosts/{id}/repo/trend?range=30d|90d|1y
+package http
+
+import (
+	stdhttp "net/http"
+
+	"github.com/go-chi/chi/v5"
+)
+
+func (s *Server) handleUIRepoTrend(w stdhttp.ResponseWriter, r *stdhttp.Request) {
+	u := s.requireUIUser(w, r)
+	if u == nil {
+		return
+	}
+	hostID := chi.URLParam(r, "id")
+	view := s.baseView(r, u)
+	view.Page = s.buildRepoTrendView(r.Context(), hostID, r.URL.Query().Get("range"))
+	if err := s.deps.UI.RenderPartial(w, "repo_size_chart", view); err != nil {
+		stdhttp.Error(w, "internal", stdhttp.StatusInternalServerError)
+	}
+}