fix: 我的配方加共享按钮 + 管理员显示版本号

- 我的配方卡片右上角加📤共享按钮，已共享/审核中显示状态标签
- 管理员账号标题下显示版本号和日期

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/src/views/RecipeSearch.vue

@@ -64,6 +64,7 @@
           />
           <span v-if="getDiaryShareStatus(d) === 'shared'" class="share-status shared">已共享</span>
           <span v-else-if="getDiaryShareStatus(d) === 'pending'" class="share-status pending">审核中</span>
+          <button v-else class="share-btn" @click.stop="shareDiaryToPublic(d)" title="共享到公共配方库">📤</button>
         </div>
         <div v-if="myDiaryRecipes.length === 0" class="empty-hint">暂无个人配方</div>
       </div>
@@ -688,6 +689,23 @@ function onCarouselTouchEnd(e) {
   color: #e65100;
 }
 
+.share-btn {
+  position: absolute;
+  top: 8px;
+  right: 8px;
+  background: rgba(255,255,255,0.9);
+  border: 1px solid #d4cfc7;
+  border-radius: 8px;
+  padding: 2px 8px;
+  font-size: 14px;
+  cursor: pointer;
+}
+
+.share-btn:hover {
+  background: #e8f5e9;
+  border-color: #7ec6a4;
+}
+
 .contrib-badge {
   font-size: 11px;
   color: #4a9d7e;