feat: SSR 悬赏帖托管、采纳与退款

compose 支持 bounty；详情悬赏条可采纳评论或按规则退回。

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}}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}}普通讨论{{end}}（不可更改）</p>
     <input type="hidden" name="post_type" value="{{.PostType}}"/>
     {{else}}
     <label>类型
@@ -24,6 +24,7 @@
         <option value="normal"{{if or (eq .PostType "normal") (eq .PostType "")}} selected{{end}}>普通讨论</option>
         <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>
       </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>
@@ -40,6 +41,13 @@
         <textarea name="poll_options" rows="6" placeholder="选项 A&#10;选项 B&#10;选项 C">{{.PollOptions}}</textarea>
       </label>
     </fieldset>
+    <fieldset class="j13-bounty-fields" id="compose-bounty-fields"{{if ne .PostType "bounty"}} hidden{{end}}>
+      <legend>悬赏设置</legend>
+      <p class="j13-muted">当前积分：{{.ViewerPoints}}。发帖时立即托管，采纳或退款前不可收回（有他人回复后作者不可自行退款）。</p>
+      <label>悬赏积分
+        <input name="bounty_points" type="number" min="1" value="{{.BountyPoints}}"/>
+      </label>
+    </fieldset>
     {{end}}
     <label>标题
       <input name="title" required maxlength="{{.TitleMax}}" value="{{.Title}}"/>
@@ -70,10 +78,12 @@
 (function () {
   var sel = document.getElementById('compose-post-type');
   var box = document.getElementById('compose-poll-fields');
+  var bounty = document.getElementById('compose-bounty-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 (qHint) qHint.hidden = sel.value !== 'question';
   }
   sel.addEventListener('change', sync);

templates/post/body.tmpl

@@ -104,6 +104,23 @@
     </div>
     {{end}}
   </header>
+  {{if .Bounty}}
+  <section class="j13-bounty" aria-label="悬赏">
+    <h2 class="j13-bounty__title">悬赏</h2>
+    <p class="j13-muted">
+      {{if eq .Bounty.Status "refunded"}}已退回{{else}}{{.Bounty.Points}} 积分{{end}}
+      · {{.Bounty.StatusLabel}}
+    </p>
+    {{if .Bounty.CanRefund}}
+    <form method="post" action="/post/{{.PostID}}/bounty/refund" class="j13-inline-form" onsubmit="return confirm('确认取消悬赏并退回积分？');">
+      <input type="hidden" name="_csrf" value="{{.CSRF}}"/>
+      <button type="submit" class="j13-btn-secondary">取消悬赏并退回</button>
+    </form>
+    {{else if .Bounty.RefundBlockReason}}
+    <p class="j13-muted">{{.Bounty.RefundBlockReason}}</p>
+    {{end}}
+  </section>
+  {{end}}
   {{if .Poll}}
   <section class="j13-poll" aria-label="投票">
     <h2 class="j13-poll__title">投票</h2>
@@ -173,6 +190,7 @@
         <span>{{.CreatedLabel}}</span>
         {{if .StatusLabel}}<span class="j13-tag j13-tag--{{.Status}}">{{.StatusLabel}}</span>{{end}}
         {{if .IsPrivate}}<span class="j13-tag">私密</span>{{end}}
+        {{if .IsBountyAward}}<span class="j13-tag j13-tag--resolved">已采纳</span>{{end}}
         {{if .ReplyToFloor}}
         <span class="j13-comment__reply-to">回复 <a href="#floor-{{.ReplyToFloor}}">#{{.ReplyToFloor}}</a>{{if .ReplyToAuthor}} {{.ReplyToAuthor}}{{end}}</span>
         {{end}}
@@ -184,6 +202,13 @@
       {{end}}
       {{if $.LoggedIn}}
       <div class="j13-comment__actions">
+        {{if .CanAwardBounty}}
+        <form method="post" action="/post/{{$.PostID}}/bounty/award" class="j13-inline-form">
+          <input type="hidden" name="_csrf" value="{{$.CSRF}}"/>
+          <input type="hidden" name="comment_id" value="{{.ID}}"/>
+          <button type="submit">采纳并发放悬赏</button>
+        </form>
+        {{end}}
         <form method="post" action="/post/{{$.PostID}}/comments/{{.ID}}/like" class="j13-inline-form">
           <input type="hidden" name="_csrf" value="{{$.CSRF}}"/>
           <button type="submit" class="j13-linkbtn">{{if .Liked}}取消赞{{else}}赞{{end}} ({{.LikeCount}})</button>