docs: add toggle UI components, submission chart, and update stats schema

apps/docs/content/progress.mdx

@@ -1,12 +1,15 @@
 ---
 title: Progress
-description: Live campaign progress — solved by difficulty, the past year of attempts, topic coverage, and the most recently solved problems, fetched from the SRS Worker.
+description: Live campaign progress — solved by difficulty, recent attempts, the year by difficulty, topic coverage, and the most recently solved problems, fetched from the SRS Worker.
 icon: loader
 ---
 
 <div className="not-prose flex flex-col gap-6">
   <SolvedRing />
-  <SubmissionHeatmap />
+  <div className="grid gap-6 md:grid-cols-2">
+    <SubmissionHeatmap />
+    <SubmissionChart />
+  </div>
   <TopicBubbles />
   <RecentSolves />
 </div>