refactor(cli): skip issue URL lookup for unplanned problems

apps/cli/sync.ts

@@ -18,13 +18,15 @@
  *   renders no badges: the docs MDX `wrapper`
  *   (`apps/docs/components/ProblemBadges.astro`) turns `topics:` and the
  *   `video:` key `videos.ts` writes into the badge row under the description.
- * - Every page carries its GitHub problem issue as frontmatter `issue:` (the
- *   issue's URL; the `problem`-labelled issue titled `LC <num> · …`), rendered
- *   by the same wrapper as a GitHub badge after the others. Like `topics:` it
- *   is filled once — on create, or on any run that finds it missing — and the
- *   issue list is fetched only on such a run (never on a sync with nothing
- *   new); offline, or with no `gh` auth, the page is written without it and
- *   the next sync retries. Delete the key to refetch it.
+ * - Every planned page (a problem the README plan lists) carries its GitHub
+ *   problem issue as frontmatter `issue:` (the URL of the `problem`-labelled
+ *   issue titled `LC <num> · …`), rendered by the same wrapper as a GitHub
+ *   badge after the others; an unplanned warm-up has no catalog issue and no
+ *   key. Like `topics:` it is filled once — on create, or on any run that
+ *   finds it missing — and the issue list is fetched only on such a run
+ *   (never on a sync with nothing new); offline, or with no `gh` auth, the
+ *   page is written without it and the next sync retries. Delete the key to
+ *   refetch it.
  * - Every tag a page carries that no campaign topic teaches (not a key of
  *   `apps/docs/topic-landings.ts`) gets a placeholder guide page in the
  *   Appendix, `appendix/<slug>.mdx`, with `list:` pointing at LeetCode's
@@ -436,8 +438,14 @@ function problemIssues(): Promise<Map<number, string> | undefined> {
   return issueUrls;
 }
 
-/** The problem's issue URL, or undefined (warned when GitHub answered but has no such issue). */
+/**
+ * The problem's issue URL, or undefined (warned when GitHub answered but has
+ * no such issue). Only a problem the README plan lists has a catalog issue;
+ * an unplanned warm-up never will, so it is not looked up — otherwise its
+ * missing key would re-list the issues and re-warn on every sync.
+ */
 async function issueUrl(sol: Solution): Promise<string | undefined> {
+  if (!topics.has(sol.num)) return undefined;
   const urls = await problemIssues();
   const url = urls?.get(sol.num);
   if (urls && !url) console.warn(`no problem issue titled "LC ${sol.num} · …" for ${sol.num}.${sol.slug}`);