diff --git a/src/_test/electron/library-notes.integration.js b/src/_test/electron/library-notes.integration.js
index edc0378..885a23f 100644
--- a/src/_test/electron/library-notes.integration.js
+++ b/src/_test/electron/library-notes.integration.js
@@ -593,6 +593,35 @@ app.whenReady().then(async () => {
         });
     })()`)
   );
+  const longShelfName = 'TheArtOfComputerProgramming超长分类名称';
+  library.updateShelf(researchShelf.id, { name: longShelfName });
+  await pollJs(
+    '超长分类名称刷新',
+    `Array.from(document.querySelectorAll('#libraryShelfList .library-filter'))
+      .some((button) => button.firstElementChild.textContent === ${JSON.stringify(longShelfName)})`
+  );
+  check(
+    '超长分类只省略名称并完整保留数量与操作区',
+    await js(`(() => {
+      const button = Array.from(document.querySelectorAll('#libraryShelfList .library-filter'))
+        .find((candidate) => candidate.firstElementChild.textContent === ${JSON.stringify(longShelfName)});
+      const name = button.firstElementChild;
+      const count = button.querySelector('.library-filter-count');
+      const actions = button.closest('.library-shelf-row').querySelector('.library-shelf-actions');
+      return getComputedStyle(button).display === 'flex'
+        && getComputedStyle(name).textOverflow === 'ellipsis'
+        && name.scrollWidth > name.clientWidth
+        && count.textContent === '（1）'
+        && count.getBoundingClientRect().width > 0
+        && count.getBoundingClientRect().right <= actions.getBoundingClientRect().left + 1;
+    })()`)
+  );
+  library.updateShelf(researchShelf.id, { name: researchShelf.name });
+  await pollJs(
+    '恢复研究书架名称',
+    `Array.from(document.querySelectorAll('#libraryShelfList .library-filter'))
+      .some((button) => button.firstElementChild.textContent === ${JSON.stringify(researchShelf.name)})`
+  );
   check(
     '标签侧栏显示真实聚合计数',
     await js(`(() => {
diff --git a/src/_test/ui.test.js b/src/_test/ui.test.js
index 752f039..f2f4a54 100644
--- a/src/_test/ui.test.js
+++ b/src/_test/ui.test.js
@@ -620,7 +620,15 @@ test('侧栏行内操作不占据布局，选中高亮与静态筛选项等宽',
   assert.doesNotMatch(css, /\.library-shelf-actions\s*\{\s*display:\s*flex;\s*flex:\s*none/);
   assert.match(css, /\.library-shelf-row \.library-filter,\s*\n\.library-tag-row \.library-filter\s*\{[^}]*padding-right:\s*48px/);
   // 分类数量紧跟名称显示为「分类（数量）」，不再像标签数量那样浮到右侧
-  assert.match(css, /#libraryTab \.library-filter\[data-shelf\] \.library-filter-count,\s*\n\.library-shelf-row \.library-filter-count\s*\{\s*float:\s*none/);
+  assert.match(css, /\.library-shelf-row \.library-filter\s*\{[^}]*display:\s*flex/);
+  const shelfName = css.match(
+    /\.library-shelf-row \.library-filter > span:first-child\s*\{([^}]*)\}/
+  );
+  assert.ok(shelfName, '缺少长分类名称的独立省略样式');
+  assert.match(shelfName[1], /min-width:\s*0/);
+  assert.match(shelfName[1], /overflow:\s*hidden/);
+  assert.match(shelfName[1], /text-overflow:\s*ellipsis/);
+  assert.match(css, /#libraryTab \.library-filter\[data-shelf\] \.library-filter-count,\s*\n\.library-shelf-row \.library-filter-count\s*\{[^}]*flex:\s*none;[^}]*float:\s*none/);
   const actionButtons = css.match(
     /\.library-shelf-actions \.notes-icon-btn,\s*\n\.library-tag-actions \.notes-icon-btn\s*\{([^}]*)\}/
   );
diff --git a/src/ui/style.css b/src/ui/style.css
index 0cac1ca..5ffada2 100644
--- a/src/ui/style.css
+++ b/src/ui/style.css
@@ -714,6 +714,16 @@ body {
 .library-tag-row { position: relative; display: flex; align-items: center; }
 .library-shelf-row .library-filter,
 .library-tag-row .library-filter { flex: 1; padding-right: 48px; }
+.library-shelf-row .library-filter {
+  display: flex;
+  align-items: center;
+}
+.library-shelf-row .library-filter > span:first-child {
+  min-width: 0;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
 .library-shelf-actions,
 .library-tag-actions {
   position: absolute;
@@ -741,7 +751,10 @@ body {
 }
 .library-filter-count { float: right; color: var(--text-dim); }
 #libraryTab .library-filter[data-shelf] .library-filter-count,
-.library-shelf-row .library-filter-count { float: none; }
+.library-shelf-row .library-filter-count {
+  flex: none;
+  float: none;
+}
 .library-content { min-width: 0; }
 .library-search {
   display: flex;