feat: refactored docs structure

apps/docs/components/BacklinksList.astro

@@ -0,0 +1,95 @@
+---
+/**
+ * The `PageFooter` slot: an Obsidian-style backlinks list under a topic landing
+ * page — every problem page that points at it, as `<num> <name>` rows in
+ * LeetCode-number order. Pages nothing points at (problem pages, the
+ * overview) render nothing; a tag no topic teaches lists its problems on its
+ * Appendix card instead (`pages/appendix.astro`), from the same answer.
+ *
+ * A problem points at a page when either
+ * - one of its topic badges links there — the same `tagTarget()` answer
+ *   `ProblemBadges.astro` renders, so this list and the badges cannot drift
+ *   (a DFS problem is a backlink of the one DFS landing its badge picks); or
+ * - it lives under the page's route (`/hybrid-structures/lru-cache` under
+ *   `/hybrid-structures`), so a topic no LeetCode tag names still lists its
+ *   own problems.
+ *
+ * Problem pages are recognised by their `<num>. <name>` title, the shape
+ * `apps/cli/sync.ts` writes.
+ *
+ * The list is a native `<details>`, open on load: the chevron at the top
+ * right of the header row collapses it like an accordion, with no JS.
+ */
+import { getEntry } from "astro:content";
+import data from "blume:data";
+import { withBase } from "blume/components/islands/base-path.ts";
+import Icon from "blume/components/Icon.astro";
+import { tagTarget, type TopicTag } from "../topic-landings.ts";
+
+interface Props {
+  route: string;
+}
+
+interface Route {
+  path: string;
+  title: string;
+  collection: string;
+  entryId: string;
+}
+
+const { route } = Astro.props;
+const routes: Route[] = data.routes;
+const served = new Set(routes.map((r) => r.path));
+
+const problems = routes.flatMap((r) => {
+  const m = r.title.match(/^(\d+)\.\s+(.+)$/);
+  return m ? [{ route: r, num: Number(m[1]), name: m[2]! }] : [];
+});
+
+// A problem page is never a backlink target: skip the per-problem lookups there.
+const backlinks = problems.some((p) => p.route.path === route)
+  ? []
+  : (
+      await Promise.all(
+        problems.map(async (p) => {
+          if (p.route.path.startsWith(`${route}/`)) return p;
+          const entry = await getEntry(p.route.collection, p.route.entryId);
+          const tags: TopicTag[] = entry?.data.topics ?? [];
+          const page = { route: p.route.path, tags };
+          return tags.some((tag) => tagTarget(tag, page, served).href === route) ? p : undefined;
+        }),
+      )
+    )
+      .filter((p) => p !== undefined)
+      .sort((a, b) => a.num - b.num);
+---
+
+{
+  backlinks.length > 0 && (
+    <details
+      class="group not-prose mx-auto mt-12 max-w-content border-border border-t pt-6"
+      open
+    >
+      <summary class="mb-2 flex cursor-pointer list-none items-center justify-between gap-2 text-muted-foreground transition-colors hover:text-foreground [&::-webkit-details-marker]:hidden">
+        <h2 class="flex items-baseline gap-2 font-medium text-xs uppercase tracking-wide" id="backlinks">
+          Backlinks
+          <span class="tabular-nums">{backlinks.length}</span>
+        </h2>
+        <Icon class="shrink-0 transition-transform group-open:rotate-180" name="chevron-down" size={16} />
+      </summary>
+      <ul class="text-sm">
+        {backlinks.map((p) => (
+          <li>
+            <a
+              class="-mx-2 flex items-baseline gap-3 rounded-md px-2 py-1 text-foreground no-underline transition-colors hover:bg-muted"
+              href={withBase(p.route.path)}
+            >
+              <span class="w-10 shrink-0 text-right font-mono text-muted-foreground text-xs tabular-nums">{p.num}</span>
+              <span class="truncate">{p.name}</span>
+            </a>
+          </li>
+        ))}
+      </ul>
+    </details>
+  )
+}

apps/docs/components/Carousel.astro

@@ -0,0 +1,170 @@
+---
+/**
+ * A horizontal carousel of <CarouselImage> slides, built the way Blume's own
+ * content components are: static markup, a custom element for the behaviour,
+ * no framework. The track is a CSS scroll-snap strip (so it also swipes on
+ * touch and the browser does the animation); prev/next sit outside it and
+ * the play toggle sits below with a "n / N" counter.
+ *
+ * `time` is seconds per slide while playing (default 1.25); `autoplay` starts
+ * playing on load. Play wraps around, pauses whenever the tab is hidden, and
+ * never starts on its own for a reader who prefers reduced motion — the
+ * button still works for them. Manual navigation (buttons, arrow keys, swipe)
+ * does not stop playback; it only restarts the interval so a step is never
+ * doubled.
+ */
+import Icon from "blume/components/Icon.astro";
+
+interface Props {
+  /** Seconds each slide stays while playing. */
+  time?: number;
+  autoplay?: boolean;
+}
+
+const { time = 1.25, autoplay = false } = Astro.props;
+
+const buttonClass =
+  "inline-flex size-9 shrink-0 cursor-pointer items-center justify-center rounded-full border border-border bg-background text-muted-foreground transition-colors hover:border-foreground hover:text-foreground disabled:cursor-default disabled:opacity-40";
+---
+
+<blume-carousel
+  class="not-prose my-6 block"
+  data-time={String(time)}
+  data-autoplay={autoplay ? "" : undefined}
+  role="region"
+  aria-roledescription="carousel"
+>
+  <div class="flex items-center gap-3">
+    <button class={buttonClass} data-prev type="button" aria-label="Previous slide">
+      <Icon class="rtl:-scale-x-100" name="chevron-left" size={18} />
+    </button>
+    <div
+      class="flex min-w-0 flex-1 snap-x snap-mandatory overflow-x-auto scroll-smooth rounded-blume [scrollbar-width:none] [&::-webkit-scrollbar]:hidden"
+      data-track
+      tabindex="0"
+      aria-live="polite"
+    >
+      <slot />
+    </div>
+    <button class={buttonClass} data-next type="button" aria-label="Next slide">
+      <Icon class="rtl:-scale-x-100" name="chevron-right" size={18} />
+    </button>
+  </div>
+  <div class="mt-3 flex items-center justify-center gap-3">
+    <button class={buttonClass} data-play type="button" aria-label="Play" aria-pressed="false">
+      <Icon class="[[aria-pressed=true]_&]:hidden" name="play" size={16} />
+      <Icon class="[[aria-pressed=false]_&]:hidden" name="pause" size={16} />
+    </button>
+    <span class="text-muted-foreground text-xs tabular-nums leading-5" data-count></span>
+  </div>
+</blume-carousel>
+
+<script>
+  class BlumeCarousel extends HTMLElement {
+    #track!: HTMLElement;
+    #play!: HTMLButtonElement;
+    #count!: HTMLElement;
+    #timer: number | null = null;
+    #index = 0;
+
+    connectedCallback() {
+      this.#track = this.querySelector("[data-track]")!;
+      this.#play = this.querySelector("[data-play]")!;
+      this.#count = this.querySelector("[data-count]")!;
+      const prev = this.querySelector<HTMLButtonElement>("[data-prev]")!;
+      const next = this.querySelector<HTMLButtonElement>("[data-next]")!;
+
+      const slides = this.#slides().length;
+      if (slides < 2) {
+        for (const b of [prev, next, this.#play]) b.disabled = true;
+      }
+      this.#render();
+
+      prev.addEventListener("click", () => this.#step(-1));
+      next.addEventListener("click", () => this.#step(1));
+      this.#play.addEventListener("click", () => (this.#timer === null ? this.#start() : this.#stop()));
+      this.addEventListener("keydown", (event) => {
+        if (event.key === "ArrowLeft") this.#step(-1);
+        else if (event.key === "ArrowRight") this.#step(1);
+        else return;
+        event.preventDefault();
+      });
+      // Swipes and trackpad scrolls move the track without #step; follow them
+      // once the scroll settles. Settle-only, not per event: a long smooth
+      // scroll from #step passes over intermediate slides and must not be
+      // read back as the reader's position mid-flight.
+      let settle: number | undefined;
+      this.#track.addEventListener(
+        "scroll",
+        () => {
+          window.clearTimeout(settle);
+          settle = window.setTimeout(() => this.#syncFromScroll(), 150);
+        },
+        { passive: true }
+      );
+      document.addEventListener("visibilitychange", this.#onVisibility);
+
+      const reduced = matchMedia("(prefers-reduced-motion: reduce)").matches;
+      if (this.hasAttribute("data-autoplay") && slides > 1 && !reduced) this.#start();
+    }
+
+    disconnectedCallback() {
+      this.#stop();
+      document.removeEventListener("visibilitychange", this.#onVisibility);
+    }
+
+    #slides(): HTMLElement[] {
+      return [...this.#track.querySelectorAll<HTMLElement>(":scope > blume-carousel-image")];
+    }
+
+    #step(delta: number) {
+      const slides = this.#slides();
+      this.#index = (this.#index + delta + slides.length) % slides.length;
+      slides[this.#index]!.scrollIntoView({ block: "nearest", inline: "start", behavior: "smooth" });
+      this.#render();
+      if (this.#timer !== null) this.#start(); // restart the interval from this slide
+    }
+
+    #syncFromScroll() {
+      const at = Math.round(this.#track.scrollLeft / this.#track.clientWidth);
+      if (at !== this.#index && Number.isFinite(at)) {
+        this.#index = Math.min(Math.max(at, 0), this.#slides().length - 1);
+        this.#render();
+      }
+    }
+
+    #start() {
+      this.#stop();
+      const ms = Number(this.dataset.time) * 1000;
+      this.#timer = window.setInterval(() => this.#step(1), ms > 0 ? ms : 1250);
+      this.#play.setAttribute("aria-pressed", "true");
+      this.#play.setAttribute("aria-label", "Pause");
+    }
+
+    #stop() {
+      if (this.#timer !== null) window.clearInterval(this.#timer);
+      this.#timer = null;
+      this.#play.setAttribute("aria-pressed", "false");
+      this.#play.setAttribute("aria-label", "Play");
+    }
+
+    // A background tab keeps its timers but not its layout; resume on return.
+    #wasPlaying = false;
+    #onVisibility = () => {
+      if (document.hidden) {
+        this.#wasPlaying = this.#timer !== null;
+        this.#stop();
+      } else if (this.#wasPlaying) this.#start();
+    };
+
+    #render() {
+      const slides = this.#slides();
+      this.#count.textContent = `${this.#index + 1} / ${slides.length}`;
+      slides.forEach((s, i) => s.setAttribute("aria-hidden", i === this.#index ? "false" : "true"));
+    }
+  }
+
+  if (!customElements.get("blume-carousel")) {
+    customElements.define("blume-carousel", BlumeCarousel);
+  }
+</script>

apps/docs/components/CarouselImage.astro

@@ -0,0 +1,45 @@
+---
+/**
+ * One slide of a <Carousel>: Blume's own <Frame> around an <img>, so a slide
+ * is pixel-identical to a framed image elsewhere on the site — `alt` doubles
+ * as the frame's hint line and `caption` is Markdown, exactly as in Frame.
+ *
+ * `src` accepts what MDX authors already write for images: a URL, a
+ * root-relative `/file.png` (served from public/, prefixed with the deploy
+ * base), or the page-relative `../../public/file.png` form. A relative path
+ * that does not pass through public/ has nothing to serve it, so it is a
+ * build error rather than a silent 404.
+ */
+import Frame from "blume/components/content/Frame.astro";
+import { withBase } from "blume/components/islands/base-path.ts";
+
+interface Props {
+  src: string;
+  alt?: string;
+  caption?: string;
+}
+
+const { src, alt, caption } = Astro.props;
+
+const resolveSrc = (value: string): string => {
+  if (URL.canParse(value)) return value;
+  if (value.startsWith("/")) return withBase(value);
+  const at = value.indexOf("public/");
+  if (at === -1) {
+    throw new Error(
+      `<CarouselImage src="${value}">: a relative src must point into public/ (or use /file.png)`
+    );
+  }
+  return withBase(`/${value.slice(at + "public/".length)}`);
+};
+---
+
+<blume-carousel-image
+  class="block w-full shrink-0 snap-center [&_blume-frame]:my-0"
+  role="group"
+  aria-roledescription="slide"
+>
+  <Frame caption={caption} hint={alt}>
+    <img alt={alt ?? ""} src={resolveSrc(src)} loading="lazy" draggable="false" />
+  </Frame>
+</blume-carousel-image>

apps/docs/components/ProblemBadges.astro

@@ -0,0 +1,134 @@
+---
+/**
+ * The MDX `wrapper`: the badge row between a page's description and its body.
+ * Blume's page template renders the title and description itself and then
+ * the MDX content, with no slot in between, so wrapping the content is the
+ * only way to land right after the description. MDX hands a wrapper no
+ * route, so it is read off the URL, and the page's frontmatter is then
+ * looked up through the route manifest — the same `getEntry` call Blume's own
+ * page template makes. Pages with none of the keys below (landing pages, the
+ * changelog) render only their content.
+ *
+ * - `topics:` (problem pages, written by `apps/cli/sync.ts`) is LeetCode's own
+ *   topic tags. A tag the campaign teaches (`topic-landings.ts`) links to that
+ *   topic's landing page and is filled; any other tag links to its card on the
+ *   Appendix glossary, `/appendix#<slug>` (`appendix.ts`), and is outlined.
+ *   `tagTarget()` picks the route (and between two landings, e.g. DFS); the
+ *   `PageFooter` backlinks list and the Appendix page read the same answer.
+ *   Each tag badge is a pill carrying the icon its target shows (a topic's
+ *   `meta.ts` icon in the sidebar, a term's `icon` on its card) and the tag's
+ *   own colour (`lib/tag-colors.ts`), assigned over every tag the site has a
+ *   page or card for — no two tags share one, and tags that share problem
+ *   pages are spread furthest apart. A tag with neither (the LeetCode-list
+ *   fallback) stays gray and iconless.
+ * - `video:` (problem pages, written by `apps/cli/videos.ts`) is the NeetCode
+ *   walkthrough's YouTube id, the red "Explanation" badge.
+ * - `issue:` (problem pages, written by sync) is the problem's GitHub issue
+ *   URL, a neutral "Issue #N" badge with the GitHub mark, right after
+ *   "Explanation" at the end of the row.
+ */
+import { getEntry } from "astro:content";
+import data from "blume:data";
+import Badge from "blume/components/content/Badge.astro";
+import { stripBase, withBase } from "blume/components/islands/base-path.ts";
+import { APPENDIX } from "../appendix.ts";
+import { tagColors } from "../lib/tag-colors.ts";
+import { TOPIC_LANDINGS, tagTarget, type TopicTag } from "../topic-landings.ts";
+
+// `/sub/tree-dfs/invert-binary-tree/` (or `.../index.html` in a static build)
+// -> `/tree-dfs/invert-binary-tree`, the base-less shape of `data.routes`.
+const route =
+  stripBase(import.meta.env.BASE_URL ?? "/", Astro.url.pathname)
+    .replace(/(\/index)?\.html$/u, "")
+    .replace(/(.)\/+$/u, "$1");
+const at = data.routes.find((r: { path: string }) => r.path === route);
+const entry = at ? await getEntry(at.collection, at.entryId) : undefined;
+const tags: TopicTag[] = entry?.data.topics ?? [];
+const video: string | undefined = entry?.data.video;
+const issue: string | undefined = entry?.data.issue;
+
+const served = new Set<string>(data.routes.map((r: { path: string }) => r.path));
+
+// route → the icon its sidebar row shows: a page's own, or a topic group's
+// (from its `meta.ts`) for the landing page the group row links to.
+interface NavNode {
+  route?: string;
+  icon?: string;
+  children?: NavNode[];
+}
+const icons = new Map<string, string>();
+const walk = (nodes: NavNode[]) => {
+  for (const node of nodes) {
+    if (node.route && node.icon && !icons.has(node.route)) icons.set(node.route, node.icon);
+    if (node.children) walk(node.children);
+  }
+};
+walk(data.navigation.sidebar);
+
+// Every tag with a landing or an Appendix card, coloured against how problem
+// pages (`<num>. <name>` titles, the shape sync writes) combine them. Only a
+// page with tags needs the answer.
+const colors = tags.length
+  ? tagColors(
+      [...Object.keys(TOPIC_LANDINGS), ...Object.keys(APPENDIX)],
+      await Promise.all(
+        data.routes
+          .filter((r: { title: string }) => /^\d+\.\s/u.test(r.title))
+          .map(async (r: { collection: string; entryId: string }) => {
+            const page = await getEntry(r.collection, r.entryId);
+            return (page?.data.topics ?? []).map((t: TopicTag) => t.slug);
+          }),
+      ),
+    )
+  : new Map<string, string>();
+
+const badges = tags.map((tag) => {
+  const target = tagTarget(tag, { route, tags }, served);
+  const external = target.kind === "external";
+  return {
+    name: tag.name,
+    href: external ? target.href : withBase(target.href),
+    external,
+    icon: target.kind === "appendix" ? APPENDIX[tag.slug]?.icon : external ? undefined : icons.get(target.href),
+    color: external ? undefined : colors.get(tag.slug),
+    stroke: target.kind !== "landing",
+  };
+});
+
+const linkClass = "no-underline transition-opacity hover:opacity-80";
+---
+
+{
+  (badges.length > 0 || video || issue) && (
+    <div class="not-prose mb-6 flex flex-wrap gap-1.5">
+      {badges.map((b) => (
+        <a
+          href={b.href}
+          target={b.external ? "_blank" : undefined}
+          rel={b.external ? "noopener" : undefined}
+          class={linkClass}
+        >
+          <Badge color={b.color} icon={b.icon} shape="pill" stroke={b.stroke}>
+            {b.name}
+          </Badge>
+        </a>
+      ))}
+      {video && (
+        <a href={`https://www.youtube.com/watch?v=${video}`} target="_blank" rel="noopener" class={linkClass}>
+          <Badge variant="danger" icon="youtube" shape="pill">
+            Explanation
+          </Badge>
+        </a>
+      )}
+      {issue && (
+        <a href={issue} target="_blank" rel="noopener" class={linkClass}>
+          <Badge icon="github" shape="pill">
+            Issue #{issue.slice(issue.lastIndexOf("/") + 1)}
+          </Badge>
+        </a>
+      )}
+    </div>
+  )
+}
+
+<slot />

apps/docs/components/progress/shared.tsx

@@ -0,0 +1,67 @@
+/**
+ * What the four progress islands share besides the data: the not-ready body
+ * (a skeleton while /api/stats loads, one muted line if it fails) and the
+ * hover tooltip for the two charts drawn as plain SVG (the heatmap calendar
+ * and the topic bubbles — Recharts has neither layout). The tooltip wears the
+ * exact classes of shadcn's ChartTooltipContent, so all four cards' tooltips
+ * look like one component.
+ */
+import { type PointerEvent, type ReactNode, useRef, useState } from "react";
+import { cn } from "../../lib/utils";
+import type { Load } from "../../lib/stats";
+import { Skeleton } from "../ui/skeleton";
+
+export function StatsPending({ load, className }: { load: Exclude<Load, { phase: "ready" }>; className: string }) {
+  if (load.phase === "loading") return <Skeleton className={className} />;
+  return (
+    <p className="my-0! text-muted-foreground text-sm">
+      Stats unavailable — they are served live from the SRS Worker, and it did not respond.
+    </p>
+  );
+}
+
+interface Tip {
+  x: number;
+  y: number;
+  content: ReactNode;
+}
+
+/**
+ * A pointer-following tooltip for SVG marks. Put `ref` on a `relative`
+ * wrapper, call `show` from a mark's pointer events, render `tip` inside the
+ * wrapper. Positions are relative to the wrapper, so page scroll never skews it.
+ */
+export function useHoverTip<T extends HTMLElement>() {
+  const ref = useRef<T>(null);
+  const [tip, setTip] = useState<Tip | null>(null);
+  const show = (event: PointerEvent, content: ReactNode) => {
+    const box = ref.current?.getBoundingClientRect();
+    if (box) setTip({ x: event.clientX - box.left, y: event.clientY - box.top, content });
+  };
+  const hide = () => setTip(null);
+  const node = tip && (
+    <div
+      className={cn(
+        "pointer-events-none absolute z-10 grid min-w-[8rem] -translate-x-1/2 -translate-y-[calc(100%+0.75rem)] items-start gap-1.5",
+        "rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl",
+      )}
+      style={{ left: tip.x, top: tip.y }}
+    >
+      {tip.content}
+    </div>
+  );
+  return { ref, show, hide, node };
+}
+
+/** One tooltip row, the shape ChartTooltipContent draws: colour dot, label, mono value. */
+export function TipRow({ color, label, value }: { color: string; label: ReactNode; value: ReactNode }) {
+  return (
+    <div className="flex w-full items-center gap-2">
+      <div className="size-2.5 shrink-0 rounded-[2px]" style={{ background: color }} />
+      <div className="flex flex-1 items-center justify-between gap-4 leading-none">
+        <span className="text-muted-foreground">{label}</span>
+        <span className="font-medium font-mono text-foreground tabular-nums">{value}</span>
+      </div>
+    </div>
+  );
+}

apps/docs/components/ui/card.tsx

@@ -0,0 +1,91 @@
+import * as React from "react"
+import { cn } from "../../lib/utils"
+
+function Card({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card"
+      className={cn(
+        "flex flex-col gap-6 rounded-xl border bg-card py-6 text-card-foreground shadow-sm",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardHeader({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-header"
+      className={cn(
+        "@container/card-header grid auto-rows-min grid-rows-[auto_auto] items-start gap-2 px-6 has-data-[slot=card-action]:grid-cols-[1fr_auto] [.border-b]:pb-6",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardTitle({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-title"
+      className={cn("leading-none font-semibold", className)}
+      {...props}
+    />
+  )
+}
+
+function CardDescription({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-description"
+      className={cn("text-sm text-muted-foreground", className)}
+      {...props}
+    />
+  )
+}
+
+function CardAction({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-action"
+      className={cn(
+        "col-start-2 row-span-2 row-start-1 self-start justify-self-end",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function CardContent({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-content"
+      className={cn("px-6", className)}
+      {...props}
+    />
+  )
+}
+
+function CardFooter({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="card-footer"
+      className={cn("flex items-center px-6 [.border-t]:pt-6", className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Card,
+  CardHeader,
+  CardFooter,
+  CardTitle,
+  CardAction,
+  CardDescription,
+  CardContent,
+}

apps/docs/components/ui/chart.tsx

@@ -0,0 +1,372 @@
+import * as React from "react"
+import { cn } from "../../lib/utils"
+import * as RechartsPrimitive from "recharts"
+import type { TooltipValueType } from "recharts"
+
+// Format: { THEME_NAME: CSS_SELECTOR }. Blume switches dark mode with
+// [data-theme="dark"] on <html>, not shadcn's .dark class.
+const THEMES = { light: "", dark: ':root[data-theme="dark"]' } as const
+
+const INITIAL_DIMENSION = { width: 320, height: 200 } as const
+type TooltipNameType = number | string
+
+export type ChartConfig = Record<
+  string,
+  {
+    label?: React.ReactNode
+    icon?: React.ComponentType
+  } & (
+    | { color?: string; theme?: never }
+    | { color?: never; theme: Record<keyof typeof THEMES, string> }
+  )
+>
+
+type ChartContextProps = {
+  config: ChartConfig
+}
+
+const ChartContext = React.createContext<ChartContextProps | null>(null)
+
+function useChart() {
+  const context = React.useContext(ChartContext)
+
+  if (!context) {
+    throw new Error("useChart must be used within a <ChartContainer />")
+  }
+
+  return context
+}
+
+function ChartContainer({
+  id,
+  className,
+  children,
+  config,
+  initialDimension = INITIAL_DIMENSION,
+  ...props
+}: React.ComponentProps<"div"> & {
+  config: ChartConfig
+  children: React.ComponentProps<
+    typeof RechartsPrimitive.ResponsiveContainer
+  >["children"]
+  initialDimension?: {
+    width: number
+    height: number
+  }
+}) {
+  const uniqueId = React.useId()
+  const chartId = `chart-${id ?? uniqueId.replace(/:/g, "")}`
+
+  return (
+    <ChartContext.Provider value={{ config }}>
+      <div
+        data-slot="chart"
+        data-chart={chartId}
+        className={cn(
+          "flex aspect-video justify-center text-xs [&_.recharts-cartesian-axis-tick_text]:fill-muted-foreground [&_.recharts-cartesian-grid_line[stroke='#ccc']]:stroke-border/50 [&_.recharts-curve.recharts-tooltip-cursor]:stroke-border [&_.recharts-dot[stroke='#fff']]:stroke-transparent [&_.recharts-layer]:outline-hidden [&_.recharts-polar-grid_[stroke='#ccc']]:stroke-border [&_.recharts-radial-bar-background-sector]:fill-muted [&_.recharts-rectangle.recharts-tooltip-cursor]:fill-muted [&_.recharts-reference-line_[stroke='#ccc']]:stroke-border [&_.recharts-sector]:outline-hidden [&_.recharts-sector[stroke='#fff']]:stroke-transparent [&_.recharts-surface]:outline-hidden",
+          className
+        )}
+        {...props}
+      >
+        <ChartStyle id={chartId} config={config} />
+        <RechartsPrimitive.ResponsiveContainer
+          initialDimension={initialDimension}
+        >
+          {children}
+        </RechartsPrimitive.ResponsiveContainer>
+      </div>
+    </ChartContext.Provider>
+  )
+}
+
+const ChartStyle = ({ id, config }: { id: string; config: ChartConfig }) => {
+  const colorConfig = Object.entries(config).filter(
+    ([, config]) => config.theme ?? config.color
+  )
+
+  if (!colorConfig.length) {
+    return null
+  }
+
+  return (
+    <style
+      dangerouslySetInnerHTML={{
+        __html: Object.entries(THEMES)
+          .map(
+            ([theme, prefix]) => `
+${prefix} [data-chart=${id}] {
+${colorConfig
+  .map(([key, itemConfig]) => {
+    const color =
+      itemConfig.theme?.[theme as keyof typeof itemConfig.theme] ??
+      itemConfig.color
+    return color ? `  --color-${key}: ${color};` : null
+  })
+  .join("\n")}
+}
+`
+          )
+          .join("\n"),
+      }}
+    />
+  )
+}
+
+const ChartTooltip = RechartsPrimitive.Tooltip
+
+function ChartTooltipContent({
+  active,
+  payload,
+  className,
+  indicator = "dot",
+  hideLabel = false,
+  hideIndicator = false,
+  label,
+  labelFormatter,
+  labelClassName,
+  formatter,
+  color,
+  nameKey,
+  labelKey,
+}: React.ComponentProps<typeof RechartsPrimitive.Tooltip> &
+  React.ComponentProps<"div"> & {
+    hideLabel?: boolean
+    hideIndicator?: boolean
+    indicator?: "line" | "dot" | "dashed"
+    nameKey?: string
+    labelKey?: string
+  } & Omit<
+    RechartsPrimitive.DefaultTooltipContentProps<
+      TooltipValueType,
+      TooltipNameType
+    >,
+    "accessibilityLayer"
+  >) {
+  const { config } = useChart()
+
+  const tooltipLabel = React.useMemo(() => {
+    if (hideLabel || !payload?.length) {
+      return null
+    }
+
+    const [item] = payload
+    const key = `${labelKey ?? item?.dataKey ?? item?.name ?? "value"}`
+    const itemConfig = getPayloadConfigFromPayload(config, item, key)
+    const value =
+      !labelKey && typeof label === "string"
+        ? (config[label]?.label ?? label)
+        : itemConfig?.label
+
+    if (labelFormatter) {
+      return (
+        <div className={cn("font-medium", labelClassName)}>
+          {labelFormatter(value, payload)}
+        </div>
+      )
+    }
+
+    if (!value) {
+      return null
+    }
+
+    return <div className={cn("font-medium", labelClassName)}>{value}</div>
+  }, [
+    label,
+    labelFormatter,
+    payload,
+    hideLabel,
+    labelClassName,
+    config,
+    labelKey,
+  ])
+
+  if (!active || !payload?.length) {
+    return null
+  }
+
+  const nestLabel = payload.length === 1 && indicator !== "dot"
+
+  return (
+    <div
+      className={cn(
+        "grid min-w-[8rem] items-start gap-1.5 rounded-lg border border-border/50 bg-background px-2.5 py-1.5 text-xs shadow-xl",
+        className
+      )}
+    >
+      {!nestLabel ? tooltipLabel : null}
+      <div className="grid gap-1.5">
+        {payload
+          .filter((item) => item.type !== "none")
+          .map((item, index) => {
+            const key = `${nameKey ?? item.name ?? item.dataKey ?? "value"}`
+            const itemConfig = getPayloadConfigFromPayload(config, item, key)
+            const indicatorColor = color ?? item.payload?.fill ?? item.color
+
+            return (
+              <div
+                key={index}
+                className={cn(
+                  "flex w-full flex-wrap items-stretch gap-2 [&>svg]:h-2.5 [&>svg]:w-2.5 [&>svg]:text-muted-foreground",
+                  indicator === "dot" && "items-center"
+                )}
+              >
+                {formatter && item?.value !== undefined && item.name ? (
+                  formatter(item.value, item.name, item, index, item.payload)
+                ) : (
+                  <>
+                    {itemConfig?.icon ? (
+                      <itemConfig.icon />
+                    ) : (
+                      !hideIndicator && (
+                        <div
+                          className={cn(
+                            "shrink-0 rounded-[2px] border-(--color-border) bg-(--color-bg)",
+                            {
+                              "h-2.5 w-2.5": indicator === "dot",
+                              "w-1": indicator === "line",
+                              "w-0 border-[1.5px] border-dashed bg-transparent":
+                                indicator === "dashed",
+                              "my-0.5": nestLabel && indicator === "dashed",
+                            }
+                          )}
+                          style={
+                            {
+                              "--color-bg": indicatorColor,
+                              "--color-border": indicatorColor,
+                            } as React.CSSProperties
+                          }
+                        />
+                      )
+                    )}
+                    <div
+                      className={cn(
+                        "flex flex-1 justify-between leading-none",
+                        nestLabel ? "items-end" : "items-center"
+                      )}
+                    >
+                      <div className="grid gap-1.5">
+                        {nestLabel ? tooltipLabel : null}
+                        <span className="text-muted-foreground">
+                          {itemConfig?.label ?? item.name}
+                        </span>
+                      </div>
+                      {item.value != null && (
+                        <span className="font-mono font-medium text-foreground tabular-nums">
+                          {typeof item.value === "number"
+                            ? item.value.toLocaleString()
+                            : String(item.value)}
+                        </span>
+                      )}
+                    </div>
+                  </>
+                )}
+              </div>
+            )
+          })}
+      </div>
+    </div>
+  )
+}
+
+const ChartLegend = RechartsPrimitive.Legend
+
+function ChartLegendContent({
+  className,
+  hideIcon = false,
+  payload,
+  verticalAlign = "bottom",
+  nameKey,
+}: React.ComponentProps<"div"> & {
+  hideIcon?: boolean
+  nameKey?: string
+} & RechartsPrimitive.DefaultLegendContentProps) {
+  const { config } = useChart()
+
+  if (!payload?.length) {
+    return null
+  }
+
+  return (
+    <div
+      className={cn(
+        "flex items-center justify-center gap-4",
+        verticalAlign === "top" ? "pb-3" : "pt-3",
+        className
+      )}
+    >
+      {payload
+        .filter((item) => item.type !== "none")
+        .map((item, index) => {
+          const key = `${nameKey ?? item.dataKey ?? "value"}`
+          const itemConfig = getPayloadConfigFromPayload(config, item, key)
+
+          return (
+            <div
+              key={index}
+              className={cn(
+                "flex items-center gap-1.5 [&>svg]:h-3 [&>svg]:w-3 [&>svg]:text-muted-foreground"
+              )}
+            >
+              {itemConfig?.icon && !hideIcon ? (
+                <itemConfig.icon />
+              ) : (
+                <div
+                  className="h-2 w-2 shrink-0 rounded-[2px]"
+                  style={{
+                    backgroundColor: item.color,
+                  }}
+                />
+              )}
+              {itemConfig?.label}
+            </div>
+          )
+        })}
+    </div>
+  )
+}
+
+// Helper to extract item config from a payload.
+function getPayloadConfigFromPayload(
+  config: ChartConfig,
+  payload: unknown,
+  key: string
+) {
+  if (typeof payload !== "object" || payload === null) {
+    return undefined
+  }
+
+  const payloadPayload =
+    "payload" in payload &&
+    typeof payload.payload === "object" &&
+    payload.payload !== null
+      ? payload.payload
+      : undefined
+
+  let configLabelKey: string = key
+
+  if (
+    key in payload &&
+    typeof payload[key as keyof typeof payload] === "string"
+  ) {
+    configLabelKey = payload[key as keyof typeof payload] as string
+  } else if (
+    payloadPayload &&
+    key in payloadPayload &&
+    typeof payloadPayload[key as keyof typeof payloadPayload] === "string"
+  ) {
+    configLabelKey = payloadPayload[
+      key as keyof typeof payloadPayload
+    ] as string
+  }
+
+  return configLabelKey in config ? config[configLabelKey] : config[key]
+}
+
+export {
+  ChartContainer,
+  ChartTooltip,
+  ChartTooltipContent,
+  ChartLegend,
+  ChartLegendContent,
+  ChartStyle,
+}

apps/docs/components/ui/skeleton.tsx

@@ -0,0 +1,13 @@
+import { cn } from "../../lib/utils"
+
+function Skeleton({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="skeleton"
+      className={cn("animate-pulse rounded-md bg-muted", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }

apps/docs/components/ui/toggle-group.tsx

@@ -0,0 +1,83 @@
+"use client"
+
+import * as React from "react"
+import { type VariantProps } from "class-variance-authority"
+import { cn } from "../../lib/utils"
+import { ToggleGroup as ToggleGroupPrimitive } from "radix-ui"
+
+import { toggleVariants } from "./toggle"
+
+const ToggleGroupContext = React.createContext<
+  VariantProps<typeof toggleVariants> & {
+    spacing?: number
+  }
+>({
+  size: "default",
+  variant: "default",
+  spacing: 0,
+})
+
+function ToggleGroup({
+  className,
+  variant,
+  size,
+  spacing = 0,
+  children,
+  ...props
+}: React.ComponentProps<typeof ToggleGroupPrimitive.Root> &
+  VariantProps<typeof toggleVariants> & {
+    spacing?: number
+  }) {
+  return (
+    <ToggleGroupPrimitive.Root
+      data-slot="toggle-group"
+      data-variant={variant}
+      data-size={size}
+      data-spacing={spacing}
+      style={{ "--gap": spacing } as React.CSSProperties}
+      className={cn(
+        "group/toggle-group flex w-fit items-center gap-[--spacing(var(--gap))] rounded-md data-[spacing=default]:data-[variant=outline]:shadow-xs",
+        className
+      )}
+      {...props}
+    >
+      <ToggleGroupContext.Provider value={{ variant, size, spacing }}>
+        {children}
+      </ToggleGroupContext.Provider>
+    </ToggleGroupPrimitive.Root>
+  )
+}
+
+function ToggleGroupItem({
+  className,
+  children,
+  variant,
+  size,
+  ...props
+}: React.ComponentProps<typeof ToggleGroupPrimitive.Item> &
+  VariantProps<typeof toggleVariants>) {
+  const context = React.useContext(ToggleGroupContext)
+
+  return (
+    <ToggleGroupPrimitive.Item
+      data-slot="toggle-group-item"
+      data-variant={context.variant || variant}
+      data-size={context.size || size}
+      data-spacing={context.spacing}
+      className={cn(
+        toggleVariants({
+          variant: context.variant || variant,
+          size: context.size || size,
+        }),
+        "w-auto min-w-0 shrink-0 px-3 focus:z-10 focus-visible:z-10",
+        "data-[spacing=0]:rounded-none data-[spacing=0]:shadow-none data-[spacing=0]:first:rounded-l-md data-[spacing=0]:last:rounded-r-md data-[spacing=0]:data-[variant=outline]:border-l-0 data-[spacing=0]:data-[variant=outline]:first:border-l",
+        className
+      )}
+      {...props}
+    >
+      {children}
+    </ToggleGroupPrimitive.Item>
+  )
+}
+
+export { ToggleGroup, ToggleGroupItem }

apps/docs/components/ui/toggle.tsx

@@ -0,0 +1,47 @@
+import * as React from "react"
+import { cva, type VariantProps } from "class-variance-authority"
+import { cn } from "../../lib/utils"
+import { Toggle as TogglePrimitive } from "radix-ui"
+
+// Blume's `accent` is its brand colour, not shadcn's subtle surface: the on
+// and hover states use background/muted instead (see theme.css).
+
+const toggleVariants = cva(
+  "inline-flex items-center justify-center gap-2 rounded-md text-sm font-medium whitespace-nowrap transition-[color,box-shadow] outline-none hover:bg-muted hover:text-muted-foreground focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-destructive/20 data-[state=on]:bg-background data-[state=on]:text-foreground data-[state=on]:shadow-sm dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+  {
+    variants: {
+      variant: {
+        default: "bg-transparent",
+        outline:
+          "border border-input bg-transparent shadow-xs hover:bg-muted hover:text-foreground",
+      },
+      size: {
+        default: "h-9 min-w-9 px-2",
+        sm: "h-8 min-w-8 px-1.5",
+        lg: "h-10 min-w-10 px-2.5",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+      size: "default",
+    },
+  }
+)
+
+function Toggle({
+  className,
+  variant,
+  size,
+  ...props
+}: React.ComponentProps<typeof TogglePrimitive.Root> &
+  VariantProps<typeof toggleVariants>) {
+  return (
+    <TogglePrimitive.Root
+      data-slot="toggle"
+      className={cn(toggleVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Toggle, toggleVariants }