feat: 帖子管理收进右上角菜单，手机端评论输入默认折叠

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

frontend/src/styles/global.css

@@ -4308,12 +4308,40 @@ a.post-title:visited {
 .post-detail-nav {
   display: flex;
   align-items: center;
+  justify-content: space-between;
   gap: 8px;
   margin-bottom: 8px;
 }
 
+.post-detail-nav-left {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  min-width: 0;
+}
+
 .post-detail-board-tag { margin: 0 !important; }
 
+.post-manage-menu-trigger {
+  flex-shrink: 0;
+  gap: 4px;
+  color: var(--color-text-2);
+}
+
+.post-manage-menu {
+  max-height: 70vh;
+  overflow-y: auto;
+  min-width: 11.5rem;
+}
+
+.post-manage-menu-hint {
+  font-weight: 400 !important;
+  font-size: 12px !important;
+  color: var(--color-text-3) !important;
+  white-space: normal;
+  line-height: 1.4;
+}
+
 .post-detail-head { margin-bottom: 12px; }
 
 .post-detail-title {
@@ -4379,12 +4407,6 @@ a.post-title:visited {
   font-size: 0.875rem;
 }
 
-.post-detail-edit-hint {
-  font-size: 12px;
-  color: var(--color-text-3);
-  align-self: center;
-}
-
 .post-revision-overlay {
   position: fixed;
   inset: 0;
@@ -4960,8 +4982,7 @@ a.post-title:visited {
   position: relative;
 }
 
-.post-detail-actions-primary,
-.post-detail-actions-manage {
+.post-detail-actions-primary {
   display: flex;
   flex-wrap: wrap;
   justify-content: center;
@@ -4969,12 +4990,6 @@ a.post-title:visited {
   gap: 8px;
 }
 
-.post-detail-actions-manage {
-  width: 100%;
-  padding-top: 12px;
-  border-top: 1px dashed var(--j13-border-light);
-}
-
 .post-detail-more-btn {
   min-width: 36px;
   padding-inline: 10px;
@@ -6215,6 +6230,61 @@ a.post-title:visited {
   flex-shrink: 0;
 }
 
+.comment-box-expanded-slot.is-collapsed {
+  display: none;
+}
+
+.comment-composer-collapsed {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  min-height: 44px;
+  padding: 8px 12px;
+  border: 1px solid var(--j13-border-light);
+  border-radius: 999px;
+  background: var(--j13-bg-workspace, hsl(var(--muted)));
+  color: var(--color-text-3);
+  font-size: 14px;
+  text-align: left;
+  cursor: pointer;
+  transition: border-color 0.15s ease, background 0.15s ease;
+}
+
+.comment-composer-collapsed:hover {
+  border-color: color-mix(in srgb, var(--j13-green) 40%, var(--j13-border-light));
+  background: var(--j13-bg-surface);
+}
+
+.comment-composer-collapsed-avatar {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 28px;
+  height: 28px;
+  border-radius: 50%;
+  overflow: hidden;
+  flex-shrink: 0;
+  background: color-mix(in srgb, var(--j13-green) 18%, transparent);
+  color: var(--j13-green);
+  font-size: 12px;
+  font-weight: 600;
+}
+
+.comment-composer-collapsed-avatar img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+
+.comment-composer-collapsed-placeholder {
+  flex: 1;
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
 .comment-box-wrap.inline {
   padding: 12px 0 4px;
   border-bottom: none;
@@ -7096,8 +7166,7 @@ a.waline-comment-author:hover {
   .post-detail-header { padding: 12px 14px 16px; }
   .post-detail-title { font-size: 17px; }
   .post-detail-actions { margin-top: 20px; padding-top: 16px; gap: 10px; }
-  .post-detail-actions-primary,
-  .post-detail-actions-manage { gap: 8px; }
+  .post-detail-actions-primary { gap: 8px; }
   .comment-section-bar { padding: 12px 14px 10px; }
   .comment-section-bar::after { left: 14px; width: 32px; }
   .comment-section:hover .comment-section-bar::after { width: 46px; }