fix: space关注按钮移除隐藏逻辑，自关注改为toast提示

- 自己的space也显示关注按钮，不再隐藏
- 点击关注自己时toast'不能关注自己'，不发请求
- 自己的space下，发消息/更多按钮保持隐藏

templates/MetaLab-2026/html/space/index.html

@@ -35,10 +35,8 @@
 
             <!-- 右：操作按钮 -->
             <div class="space-header-actions">
-                {{if .IsOwnSpace}}
-                <!-- 本人无关注按钮 -->
-                {{else}}
-                <button id="space-follow-btn" class="space-action-btn primary" data-uid="{{.SpaceUser.ID}}">+ 关注</button>
+                <button id="space-follow-btn" class="space-action-btn primary" data-uid="{{.SpaceUser.ID}}" data-current-uid="{{.CurrentUID}}">+ 关注</button>
+                {{if not .IsOwnSpace}}
                 <button class="space-action-btn">发消息</button>
                 <button class="space-action-btn icon-only" title="更多">⋮</button>
                 {{end}}
@@ -576,10 +574,11 @@
 
 {{template "layout/footer.html" .}}
 
-<!-- 访客空间：关注按钮交互 -->
-{{if and (not .IsOwnSpace) (or (eq .ActiveTab "following") (eq .ActiveTab "followers"))}}
+<!-- 关注按钮交互 -->
+{{if or (eq .ActiveTab "following") (eq .ActiveTab "followers")}}
 <script nonce="{{.CSPNonce}}">
 (function() {
+    var currentUID = {{.CurrentUID}} || 0;
     var cards = document.querySelectorAll('.space-user-card');
     if (!cards.length) return;
 
@@ -605,7 +604,7 @@
         if (state === 'following' || state === 'mutual') btn.classList.add('followed');
     }
 
-    // 批量获取并更新每个卡片关注状态
+    // 批量获取并更新每个卡片关注状态（仅非自己）
     cards.forEach(function(card) {
         var btn = card.querySelector('.space-follow-btn');
         if (!btn || btn.disabled) return;
@@ -618,6 +617,10 @@
             });
 
         btn.addEventListener('click', function() {
+            if (currentUID && parseInt(targetUid) === currentUID) {
+                showToast('不能关注自己');
+                return;
+            }
             btn.classList.add('waiting');
             var xhr = new XMLHttpRequest();
             xhr.open('POST', '/api/users/' + targetUid + '/follow', true);
@@ -637,6 +640,12 @@
     var topFollowBtn = document.getElementById('space-follow-btn');
     if (topFollowBtn) {
         var topUid = topFollowBtn.getAttribute('data-uid');
+        if (currentUID && parseInt(topUid) === currentUID) {
+            topFollowBtn.textContent = '+ 关注';
+            topFollowBtn.addEventListener('click', function() {
+                showToast('不能关注自己');
+            });
+        } else {
             fetch('/api/users/' + topUid + '/follow-status')
                 .then(function(res) { return res.json(); })
                 .then(function(data) {
@@ -670,6 +679,7 @@
                 xhr.send();
             });
         }
+    }
 })();
 </script>
 {{end}}