清除业务契约双读：抽奖/草稿/时间戳/邮件只认新格式，并删除 legacy 短代码改写。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/components/PostComposer.tsx

@@ -69,8 +69,6 @@ type ComposeDraft = {
   tags: string;
   boardId: number;
   postType?: string;
-  /** @deprecated 旧草稿仅有 JSON 字符串；新草稿用 typeForm */
-  typeMeta?: string;
   typeForm?: TypeFormSnapshot;
   updatedAt: number;
 };
@@ -90,70 +88,12 @@ function serializeTags(tags: string[]): string {
   return tags.join(", ");
 }
 
-/** 从旧版 typeMeta JSON 尽量还原类型表单（不完整则用默认） */
-function typeFormFromMeta(
-  postType: PostTypeValue,
-  raw: string | undefined
-): Partial<TypeFormSnapshot> {
-  if (!raw?.trim()) return {};
-  try {
-    const m = JSON.parse(raw) as Record<string, unknown>;
-    const out: Partial<TypeFormSnapshot> = {};
-    const endsAt = typeof m.ends_at === "string" ? m.ends_at : "";
-    const expireDays = Number(m.expire_days);
-    if (endsAt) {
-      const t = Date.parse(endsAt);
-      if (Number.isFinite(t)) {
-        out.deadlineMode = "custom";
-        out.customEndsLocal = toLocalInputValue(new Date(t));
-      }
-    } else if (Number.isFinite(expireDays) && expireDays > 0) {
-      out.deadlineMode = "preset";
-    }
-    if (postType === "poll") {
-      if (Array.isArray(m.options)) {
-        const opts = m.options.map((o) => String(o ?? ""));
-        out.pollOptions = opts.length >= 2 ? opts : ["", ""];
-      }
-      out.pollMulti = !!m.multi;
-      out.pollAnonymous = m.anonymous !== false;
-      if ((POLL_EXPIRE_DAYS as readonly number[]).includes(expireDays)) {
-        out.pollExpireDays = expireDays;
-      }
-    } else if (postType === "bounty") {
-      const p = Number(m.points);
-      out.bountyPoints = p > 0 ? Math.floor(p) : "";
-      if ((BOUNTY_EXPIRE_DAYS as readonly number[]).includes(expireDays)) {
-        out.bountyExpireDays = expireDays;
-      }
-    } else if (postType === "lottery") {
-      const prizes = Array.isArray(m.prizes)
-        ? (m.prizes as { name?: string; count?: number }[]).map((p) => ({
-            name: String(p.name || "").slice(0, 32),
-            count:
-              typeof p.count === "number" && p.count >= 1
-                ? Math.floor(p.count)
-                : ("" as const),
-          }))
-        : [];
-      out.lotteryPrizes =
-        prizes.length > 0 ? prizes : [{ name: "", count: "" as const }];
-      if ((LOTTERY_EXPIRE_DAYS as readonly number[]).includes(expireDays)) {
-        out.lotteryExpireDays = expireDays;
-      }
-    }
-    return out;
-  } catch {
-    return {};
-  }
-}
-
 function draftHasContent(d: ComposeDraft): boolean {
   if (d.title.trim() || d.content.trim() || d.tags.trim()) return true;
   if (d.boardId > 0) return true;
   const pt = normalizePostType(d.postType);
   if (pt !== "discussion") return true;
-  if (d.typeForm || (d.typeMeta && d.typeMeta.trim())) return true;
+  if (d.typeForm) return true;
   return false;
 }
 
@@ -177,8 +117,14 @@ function readDraft(): ComposeDraft | null {
   try {
     const raw = localStorage.getItem(DRAFT_KEY);
     if (!raw) return null;
-    const d = JSON.parse(raw) as ComposeDraft;
+    const d = JSON.parse(raw) as ComposeDraft & { typeMeta?: string };
     if (!d || typeof d !== "object") return null;
+    // 仅含旧 typeMeta、无 typeForm 的草稿已废弃
+    if (d.typeMeta && !d.typeForm) {
+      clearDraft();
+      return null;
+    }
+    delete d.typeMeta;
     return d;
   } catch {
     return null;
@@ -295,7 +241,6 @@ export default function PostComposer(props: PostComposerProps) {
     try {
       const raw = JSON.parse(props.initialTypeMeta || "{}") as {
         prizes?: { name?: string; count?: number }[];
-        slots?: number;
       };
       if (Array.isArray(raw.prizes) && raw.prizes.length > 0) {
         return raw.prizes.map((p) => ({
@@ -303,9 +248,6 @@ export default function PostComposer(props: PostComposerProps) {
           count: Math.max(1, Number(p.count) || 1),
         }));
       }
-      // 旧数据仅有 slots：数量可回填，名称留空让作者补全
-      const slots = Number(raw.slots);
-      if (slots > 0) return [{ name: "", count: slots }];
       return [{ name: "", count: "" }];
     } catch {
       return [{ name: "", count: "" }];
@@ -573,9 +515,7 @@ export default function PostComposer(props: PostComposerProps) {
     const nextType = normalizePostType(draftBanner.postType);
     setPostType(nextType);
 
-    const fromMeta = typeFormFromMeta(nextType, draftBanner.typeMeta);
     const snap: Partial<TypeFormSnapshot> = {
-      ...fromMeta,
       ...(draftBanner.typeForm || {}),
     };
 
@@ -615,9 +555,7 @@ export default function PostComposer(props: PostComposerProps) {
     }
     if (snap.customEndsLocal) setCustomEndsLocal(snap.customEndsLocal);
 
-    // 编辑态用的 typeMeta 字符串一并同步，避免后续误用空串
-    if (draftBanner.typeMeta) setTypeMeta(draftBanner.typeMeta);
-    else if (draftBanner.typeForm) setTypeMeta("");
+    if (draftBanner.typeForm) setTypeMeta("");
 
     setDraftBanner(null);
     skipDraftSave.current = false;