feat: SSR 抽奖帖发帖与开奖

compose 支持 lottery；详情抽奖卡可开奖并展示中奖名单。同步勾选已落地的 health/robots/sitemap/uploads/限流清单项。

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

templates/compose.tmpl

@@ -16,7 +16,7 @@
       </select>
     </label>
     {{if .IsEdit}}
-    <p class="j13-muted">类型：{{if eq .PostType "poll"}}投票{{else if eq .PostType "question"}}问答{{else if eq .PostType "bounty"}}悬赏{{else}}普通讨论{{end}}（不可更改）</p>
+    <p class="j13-muted">类型：{{if eq .PostType "poll"}}投票{{else if eq .PostType "question"}}问答{{else if eq .PostType "bounty"}}悬赏{{else if eq .PostType "lottery"}}抽奖{{else}}普通讨论{{end}}（不可更改）</p>
     <input type="hidden" name="post_type" value="{{.PostType}}"/>
     {{else}}
     <label>类型
@@ -25,6 +25,7 @@
         <option value="question"{{if eq .PostType "question"}} selected{{end}}>问答</option>
         <option value="poll"{{if eq .PostType "poll"}} selected{{end}}>投票</option>
         <option value="bounty"{{if eq .PostType "bounty"}} selected{{end}}>悬赏</option>
+        <option value="lottery"{{if eq .PostType "lottery"}} selected{{end}}>抽奖</option>
       </select>
     </label>
     <p class="j13-muted" id="compose-question-hint"{{if ne .PostType "question"}} hidden{{end}}>问答帖无额外字段；解决状态可在帖详情由作者或管理员切换。</p>
@@ -48,6 +49,13 @@
         <input name="bounty_points" type="number" min="1" value="{{.BountyPoints}}"/>
       </label>
     </fieldset>
+    <fieldset class="j13-lottery-fields" id="compose-lottery-fields"{{if ne .PostType "lottery"}} hidden{{end}}>
+      <legend>抽奖设置</legend>
+      <p class="j13-muted">参与者：已发布评论且非楼主（按用户去重）。人数足够后可由作者或管理员开奖。</p>
+      <label>中奖人数
+        <input name="lottery_winner_count" type="number" min="1" max="20" value="{{.LotteryWinners}}"/>
+      </label>
+    </fieldset>
     {{end}}
     <label>标题
       <input name="title" required maxlength="{{.TitleMax}}" value="{{.Title}}"/>
@@ -79,11 +87,13 @@
   var sel = document.getElementById('compose-post-type');
   var box = document.getElementById('compose-poll-fields');
   var bounty = document.getElementById('compose-bounty-fields');
+  var lottery = document.getElementById('compose-lottery-fields');
   var qHint = document.getElementById('compose-question-hint');
   if (!sel) return;
   function sync() {
     if (box) box.hidden = sel.value !== 'poll';
     if (bounty) bounty.hidden = sel.value !== 'bounty';
+    if (lottery) lottery.hidden = sel.value !== 'lottery';
     if (qHint) qHint.hidden = sel.value !== 'question';
   }
   sel.addEventListener('change', sync);

templates/post/body.tmpl

@@ -121,6 +121,27 @@
     {{end}}
   </section>
   {{end}}
+  {{if .Lottery}}
+  <section class="j13-lottery" aria-label="抽奖">
+    <h2 class="j13-lottery__title">抽奖</h2>
+    <p class="j13-muted">
+      中奖 {{.Lottery.WinnerCount}} 人 · 参与 {{.Lottery.ParticipantCount}} 人 · {{.Lottery.StatusLabel}}
+    </p>
+    {{if .Lottery.CanDraw}}
+    <form method="post" action="/post/{{.PostID}}/lottery/draw" class="j13-inline-form" onsubmit="return confirm('确认开奖？人数不足会失败。');">
+      <input type="hidden" name="_csrf" value="{{.CSRF}}"/>
+      <button type="submit">开奖</button>
+    </form>
+    {{end}}
+    {{if .Lottery.Winners}}
+    <ul class="j13-lottery__winners">
+      {{range .Lottery.Winners}}
+      <li>{{if .UserID}}<a href="/user/{{.UserID}}">{{.Name}}</a>{{else}}{{.Name}}{{end}}</li>
+      {{end}}
+    </ul>
+    {{end}}
+  </section>
+  {{end}}
   {{if .Poll}}
   <section class="j13-poll" aria-label="投票">
     <h2 class="j13-poll__title">投票</h2>