refactor(components): add appendix tag icons and drop list badge

apps/docs/components/BacklinksList.astro

@@ -1,9 +1,10 @@
 ---
 /**
  * The `PageFooter` slot: an Obsidian-style backlinks list under a topic landing
- * or guide page — every problem page that points at it, as `<num> <name>`
- * rows in LeetCode-number order. Pages nothing points at (problem pages, the
- * overview, the changelog) render nothing.
+ * 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

apps/docs/components/ProblemBadges.astro

@@ -11,28 +11,27 @@
  *
  * - `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 guide
- *   page in the Appendix, `/appendix/<slug>` (sync creates one per such tag), and is outlined.
+ *   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 reads the same answer. Each tag badge is a
- *   pill carrying the icon its target shows in the sidebar (the topic's
- *   `meta.ts` icon, the guide's `icon:`) and the tag's own colour
- *   (`lib/tag-colors.ts`), assigned over every tag the site has a page for —
- *   no two tags share one, and tags that share problem pages are spread
- *   furthest apart. A tag with no page (the LeetCode-list fallback) stays
- *   gray and iconless.
+ *   `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.
- * - `list:` (guide pages, written by sync on create) is the tag's LeetCode
- *   problem list, an orange "LeetCode list" badge.
  */
 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";
 
@@ -46,7 +45,6 @@ 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 list: string | undefined = entry?.data.list;
 const issue: string | undefined = entry?.data.issue;
 
 const served = new Set<string>(data.routes.map((r: { path: string }) => r.path));
@@ -67,15 +65,12 @@ const walk = (nodes: NavNode[]) => {
 };
 walk(data.navigation.sidebar);
 
-// Every tag with a page — the ones a landing teaches, plus every served guide —
-// coloured against how problem pages (`<num>. <name>` titles, the shape sync
-// writes) combine them. Only a page with tags needs the answer.
+// 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),
-        ...[...served].flatMap((path) => path.match(/^\/appendix\/([^/]+)$/u)?.slice(1) ?? []),
-      ],
+      [...Object.keys(TOPIC_LANDINGS), ...Object.keys(APPENDIX)],
       await Promise.all(
         data.routes
           .filter((r: { title: string }) => /^\d+\.\s/u.test(r.title))
@@ -94,7 +89,7 @@ const badges = tags.map((tag) => {
     name: tag.name,
     href: external ? target.href : withBase(target.href),
     external,
-    icon: external ? undefined : icons.get(target.href),
+    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",
   };
@@ -104,7 +99,7 @@ const linkClass = "no-underline transition-opacity hover:opacity-80";
 ---
 
 {
-  (badges.length > 0 || video || list || issue) && (
+  (badges.length > 0 || video || issue) && (
     <div class="not-prose mb-6 flex flex-wrap gap-1.5">
       {badges.map((b) => (
         <a
@@ -132,13 +127,6 @@ const linkClass = "no-underline transition-opacity hover:opacity-80";
           </Badge>
         </a>
       )}
-      {list && (
-        <a href={list} target="_blank" rel="noopener" class={linkClass}>
-          <Badge variant="warning" icon="list" shape="pill">
-            LeetCode list
-          </Badge>
-        </a>
-      )}
     </div>
   )
 }