feat: 活动日志撤销+详情+排版优化

活动日志:
- 删除配方/用户/精油加撤销按钮
- 编辑配方记录修改了哪些字段（名称/成分/标签/备注/英文名）
- 创建标签记入日志
- 注册记入日志（已有）

配方卡片:
- 精油按字母排序
- 容量移到名字后面
- 标签对viewer不可见
- 管理配方标签排序+容量显示

其他:
- 管理员共享直接显示已共享
- 点击轮播清除搜索
- 编辑overlay防误关

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

backend/main.py

@@ -868,7 +868,17 @@ def update_recipe(recipe_id: int, update: RecipeUpdate, user=Depends(get_current
                 (recipe_id, tag),
             )
     c.execute("UPDATE recipes SET updated_by = ?, version = COALESCE(version, 1) + 1 WHERE id = ?", (user["id"], recipe_id))
-    log_audit(conn, user["id"], "update_recipe", "recipe", recipe_id, update.name)
+    # Get recipe name for log
+    rname = c.execute("SELECT name FROM recipes WHERE id = ?", (recipe_id,)).fetchone()
+    changed = []
+    if update.name is not None: changed.append("名称")
+    if update.ingredients is not None: changed.append("成分")
+    if update.tags is not None: changed.append("标签")
+    if update.note is not None: changed.append("备注")
+    if update.en_name is not None: changed.append("英文名")
+    log_audit(conn, user["id"], "update_recipe", "recipe", recipe_id,
+              rname["name"] if rname else update.name,
+              json.dumps({"changed": "、".join(changed)}, ensure_ascii=False) if changed else None)
     conn.commit()
     conn.close()
     return {"ok": True}
@@ -1030,7 +1040,7 @@ def create_tag(body: dict, user=Depends(require_role("admin", "senior_editor", "
         raise HTTPException(400, "Tag name required")
     conn = get_db()
     conn.execute("INSERT OR IGNORE INTO tags (name) VALUES (?)", (name,))
-    # Don't log tag creation (too frequent/noisy)
+    log_audit(conn, user["id"], "create_tag", "tag", name, name, None)
     conn.commit()
     conn.close()
     return {"ok": True}