refactor(consult): state the answer shape once in the natal prompt (BUG-1256 step 1)

The English shape summary sat in the system prompt four times (contract,
index, natal heading rule, skill skeleton) and the contract restated the
Chinese ANSWER SHAPE point by point. Keep the summary in the contract only and
drop the restatements; the Chinese ANSWER SHAPE stays the one full statement.
General answer-policy bullets no longer sit under the reference_transparency
header.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017eEAG8HD3mm8gsKXgk8uU8

frontend/src/lib/consultation-thinking-plan.ts

@@ -323,7 +323,6 @@ export function consultationSpokenHeadingRule(kind: "natal" | "general" | "windo
   const activity = "Do not invent a thinking-process checklist. Activity, progress, and receipts are server-owned.";
   if (kind === "natal") {
     return [
-      `${NATAL_ANSWER_SHAPE_SUMMARY} The body never restarts the answer under a 先回答 heading. Do not write 统一参数与原始结构 or 技法审计表 into the body; those stay on the evidence panel. A follow-up turn follows the shape instruction in the user turn instead.`,
       "Write paragraphs. Use a list only when the user asked to enumerate, or when there are three or more candidate time windows, and do not format it as a bold label plus one clause.",
       activity,
       secrets,