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

apps/docs/lib/stats.ts

@@ -29,27 +29,30 @@ export interface Stats {
   topics: { issue: number; name: string; total: number; done: number; taught: boolean }[];
   /** The ten most recently solved, newest first, dated by first pass (ET). */
   recent: { lc: number; title: string; difficulty: Difficulty; date: string }[];
-  /** The 365 days ending today (ET), zeros included, plus LeetCode's three figures. */
-  year: {
-    days: { date: string; attempts: number; passes: number }[];
-    attempts: number;
-    active_days: number;
-    max_streak: number;
-  };
+  /**
+   * The 365 days ending today (ET), zeros included — always the current
+   * calendar year to date. Per difficulty: every logged attempt, and every
+   * first solve (the first-pass date `recent` uses).
+   */
+  year: Day[];
+}
+
+export interface Day {
+  date: string;
+  passes: number;
+  attempts: Record<Difficulty, number>;
+  solved: Record<Difficulty, number>;
 }
 
 function isStats(value: unknown): value is Stats {
   if (typeof value !== "object" || value === null) return false;
   const v = value as Record<string, unknown>;
-  const year = v.year as Record<string, unknown> | null | undefined;
   return (
     Array.isArray(v.difficulty) &&
     typeof v.attempting === "number" &&
     Array.isArray(v.topics) &&
     Array.isArray(v.recent) &&
-    typeof year === "object" &&
-    year !== null &&
-    Array.isArray(year.days)
+    Array.isArray(v.year)
   );
 }