chore(config): simplify Blume config and add issue frontmatter schema

apps/docs/blume.config.ts

@@ -1,88 +1,8 @@
 import { defineConfig } from "blume";
-import { hashText } from "blume/core/sources/cache.ts";
-import type { ContentSource } from "blume/core/sources/types.ts";
 import type { StandardSchema } from "blume/core/standard-schema.ts";
-import { custom, filesystem } from "blume/sources";
-import { githubReleasesSource } from "blume/sources/github-releases.ts";
+import { filesystem } from "blume/sources";
 import redirects from "./redirects";
 
-/**
- * GitHub releases → /changelog, dated by the real finish instant of the topic
- * or `Review <N> — <Phase>` issue each release records.
- *
- * Blume dates a release entry by `published_at`, which the GitHub API cannot
- * backdate — so the releases backfilled on one day (apps/cli/
- * release-topics.ts) would all read that day. Their tags are timever
- * (`YYYYMMDD.HHMMSS.NNNNNNNNN`, UTC) of the moment the topic or review
- * finished, so this fetch rewrites each timever release's `published_at` to
- * that instant before Blume maps it; anything else passes through untouched.
- * The config-level `githubReleases()` accepts no `fetchImpl`, hence the
- * `custom()` wrap of the underlying source (the `blume/sources/*.ts` path the
- * Blume docs use for custom sources), with the context the built-in adapter
- * would receive.
- */
-const TIMEVER = /^(\d{4})(\d{2})(\d{2})\.(\d{2})(\d{2})(\d{2})\.\d{9}$/;
-
-const releasesDatedByTag: typeof fetch = async (input, init) => {
-  const res = await fetch(input, init);
-  if (!res.ok) return res;
-  const releases: unknown = await res.json();
-  if (Array.isArray(releases)) {
-    for (const release of releases) {
-      const m =
-        typeof release?.tag_name === "string"
-          ? release.tag_name.match(TIMEVER)
-          : null;
-      if (m)
-        release.published_at = `${m[1]}-${m[2]}-${m[3]}T${m[4]}:${m[5]}:${m[6]}Z`;
-    }
-  }
-  // Blume reads only `ok` and the JSON body, so the original headers (whose
-  // content-length/encoding describe the upstream bytes) are not carried over.
-  return Response.json(releases, { status: res.status });
-};
-
-/**
- * The changelog index tags every row with `changelog.category`, which the
- * GitHub source sets to "Release" for all of them. release-topics.ts names
- * each release after its issue, so the title prefix says which kind finished
- * — a topic's core set, or a Review day block — and the row is tagged
- * `Topic` / `Review` instead. The category lives both in `data` and in the
- * staged `raw` frontmatter Astro re-parses, so both are rewritten (and the
- * hash with them). Wrapped around the source Blume rebuilds via
- * `withContext`, so the rebuilt one is tagged too.
- */
-const RELEASE_KIND = /^(Topic|Review) \d+ — /;
-
-const releasesByKind = (source: ContentSource): ContentSource => ({
-  ...source,
-  load: async () => {
-    const result = await source.load();
-    for (const entry of result.entries) {
-      const kind =
-        typeof entry.data.title === "string"
-          ? entry.data.title.match(RELEASE_KIND)?.[1]
-          : undefined;
-      const changelog = entry.data.changelog;
-      if (
-        !kind ||
-        !changelog ||
-        typeof changelog !== "object" ||
-        !("category" in changelog)
-      )
-        continue;
-      changelog.category = kind;
-      if (entry.raw) {
-        entry.raw = entry.raw.replace(/^( {2}category: ).*$/m, `$1${kind}`);
-        entry.hash = hashText(entry.raw);
-      }
-    }
-    return result;
-  },
-  withContext:
-    source.withContext && ((ctx) => releasesByKind(source.withContext!(ctx))),
-});
-
 // Blume's defaults (`inter`, `ibm-plex-mono`) are fetched from fonts.gstatic.com
 // on every build, which has timed out on the Pages runner and, fully offline,
 // silently ships no fonts at all. The same two families from Fontsource, as
@@ -114,8 +34,9 @@ const plexMono = {
 /**
  * Custom frontmatter, rendered as the badge row by
  * components/ProblemBadges.astro. Problem pages: `topics:` is LeetCode's topic
- * tags (written by apps/cli/sync.ts), `video:` the NeetCode walkthrough's
- * YouTube id (apps/cli/videos.ts). Guide pages (content/guides/, created by
+ * tags and `issue:` the problem's GitHub issue URL (both written by
+ * apps/cli/sync.ts), `video:` the NeetCode walkthrough's
+ * YouTube id (apps/cli/videos.ts). Guide pages (content/appendix/, created by
  * sync): `list:` is the tag's LeetCode problem list. Blume rejects undeclared
  * keys and takes any Standard Schema; these are hand-rolled so the docs
  * workspace needs no zod. All optional — every other page carries none.
@@ -153,6 +74,12 @@ const listSchema = optional(
     typeof value === "string" &&
     /^https:\/\/leetcode\.com\/problem-list\/[\w-]+\/$/.test(value),
 );
+const issueSchema = optional(
+  "expected a https://github.com/<owner>/<repo>/issues/<n> URL",
+  (value): value is string =>
+    typeof value === "string" &&
+    /^https:\/\/github\.com\/[\w.-]+\/[\w.-]+\/issues\/\d+$/.test(value),
+);
 
 export default defineConfig({
   title: "prdlk",
@@ -168,11 +95,17 @@ export default defineConfig({
   lastModified: "git",
   redirects,
   frontmatter: {
-    extend: { topics: topicsSchema, video: videoSchema, list: listSchema },
+    extend: {
+      topics: topicsSchema,
+      video: videoSchema,
+      list: listSchema,
+      issue: issueSchema,
+    },
   },
   seo: {
     og: { enabled: true },
-    rss: { enabled: true, types: ["changelog"] },
+    // No `rss`: the changelog is one custom page (pages/changelog.astro), not
+    // `type: changelog` entries, so a changelog feed would have nothing in it.
     sitemap: true,
     robots: true,
     structuredData: true,
@@ -192,30 +125,11 @@ export default defineConfig({
     llmsTxt: true,
     mcp: { enabled: false },
   },
+  // The only content source. `/changelog` is a custom page (pages/
+  // changelog.astro) reading the GitHub releases itself — one timeline, no
+  // per-release pages, so nothing of it enters the sidebar or prev/next.
   content: {
-    sources: [
-      filesystem({ root: "content" }),
-      custom(
-        releasesByKind(
-          githubReleasesSource(
-            {
-              name: "changelog",
-              prefix: "changelog",
-              owner: "prdlk",
-              repo: "leetcode",
-              fetchImpl: releasesDatedByTag,
-            },
-            // What resolve.ts hands the built-in adapter: `.blume/cache/<name>/`,
-            // and a refresh on every load (the source reads nothing else).
-            {
-              projectRoot: import.meta.dirname,
-              cacheDir: `${import.meta.dirname}/.blume/cache/changelog`,
-              mode: "build",
-            },
-          ),
-        ),
-      ),
-    ],
+    sources: [filesystem({ root: "content" })],
   },
   theme: {
     fonts: { display: inter, body: inter, mono: plexMono },
@@ -225,9 +139,7 @@ export default defineConfig({
     sidebar: {
       display: "flat", // "flat" | "group" | "page"
     },
-    tabs: [
-      { label: "Guides", path: "/guides" },
-      { label: "Changelog", path: "/changelog" },
-    ],
+    // A plain header link on the right, not a tab.
+    actions: [{ href: "/changelog", label: "Changelog" }],
   },
 });