feat(web): refresh palette, simplify ranking toolbar and drop export

reaction_board/web/static/views/fans.js

@@ -1,6 +1,6 @@
 import { api } from "../api.js";
 import { centerActiveChips, emptyState, sectionHeader } from "../components.js";
-import { lineChart } from "../charts.js";
+import { lineChart, themeColor } from "../charts.js";
 import {
   escapeAttr, escapeHtml, formatCount, formatDate, formatDelta,
 } from "../format.js";
@@ -82,7 +82,7 @@ export async function renderFans(root, { query }) {
       dates: fans.dates || [],
       values: fans.series || [],
       name: "粉丝",
-      color: "#9b7bff",
+      color: themeColor("accent"),
       scale: true,
     });
   }