fix(arr): drop the forced flag from subtitle grab

§15 gives forced tracks no sidecar name and never lets them
satisfy a want; ranking already rejects every forced candidate
(#222). A grab endpoint accepting `forced: true` had nowhere
coherent to put the result, so the flag and its stale test are
gone (#233).

web/src/subtitles.ts

@@ -205,8 +205,10 @@ export type SubtitleWriteOutcome =
 
 /**
  * One click: the daemon fetches the candidate, runs `alass` over it and
- * writes the sidecar (§15). The candidate's own flags travel with it —
- * nothing on the server remembers a search.
+ * writes the sidecar (§15). The candidate's own SDH flag travels with it —
+ * nothing on the server remembers a search. No `forced` flag to send: a
+ * forced candidate is never eligible, so the panel never offers a grab
+ * button for one (§15, issue #233).
  *
  * A grab can fail because the candidate itself expired between the search
  * and the click (issue #221) — the server reports that as `code:
@@ -224,7 +226,6 @@ export async function grabSubtitle(
         provider: candidate.provider,
         candidate_id: candidate.candidate_id,
         language: candidate.language,
-        forced: candidate.forced,
         sdh: candidate.sdh,
       }),
     });