diff --git a/.Jules/palette.md b/.Jules/palette.md
new file mode 100644
index 0000000..bf2c57e
--- /dev/null
+++ b/.Jules/palette.md
@@ -0,0 +1,3 @@
+## 2026-08-19 - Accessibility & Tooltips for Icon-only Navigation Buttons
+经验心得： 在 Flutter 中，仅有 Icon 的按钮（如 CustomAppbar 的返回按钮、TaskCreationPage 的关闭与新增按钮）容易遗漏屏幕阅读器标签与悬停/长按提示。将 Icon 按钮包裹在 `Semantics(label: '...', button: true)` 和 `Tooltip(message: '...')` 下，可大幅提升无障碍体验（a11y）和桌面/长按交互体验。
+后续行动： 未来构建仅图标按钮组件时，应确保同时传递 `tooltip` 与语义说明（`Semantics`）。
diff --git a/lib/pages/TaskCreationPage/task_creation_page.dart b/lib/pages/TaskCreationPage/task_creation_page.dart
index 406c48c..8606c1d 100644
--- a/lib/pages/TaskCreationPage/task_creation_page.dart
+++ b/lib/pages/TaskCreationPage/task_creation_page.dart
@@ -28,10 +28,17 @@ class TaskCreationPage {
                 onPrimary: Theme.of(context).colorScheme.onSurface,
               ),
             ),
-            child: M3EIconButton(
-              icon: Icon(Icons.close_rounded),
-              variant: M3EIconButtonVariant.filled,
-              onPressed: () => Navigator.of(context).pop(),
+            child: Semantics(
+              label: '关闭',
+              button: true,
+              child: Tooltip(
+                message: '关闭',
+                child: M3EIconButton(
+                  icon: const Icon(Icons.close_rounded),
+                  variant: M3EIconButtonVariant.filled,
+                  onPressed: () => Navigator.of(context).pop(),
+                ),
+              ),
             ),
           ),
         ),
@@ -46,13 +53,20 @@ class TaskCreationPage {
                     onPrimary: Theme.of(context).colorScheme.onPrimaryContainer,
                   ),
                 ),
-                child: M3EIconButton(
-                  icon: Icon(
-                    Icons.add_rounded,
-                    color: Theme.of(context).colorScheme.onPrimaryContainer,
+                child: Semantics(
+                  label: '新建任务',
+                  button: true,
+                  child: Tooltip(
+                    message: '新建任务',
+                    child: M3EIconButton(
+                      icon: Icon(
+                        Icons.add_rounded,
+                        color: Theme.of(context).colorScheme.onPrimaryContainer,
+                      ),
+                      variant: M3EIconButtonVariant.filled,
+                      onPressed: () => _handleCreate(context, ref),
+                    ),
                   ),
-                  variant: M3EIconButtonVariant.filled,
-                  onPressed: () => _handleCreate(context, ref),
                 ),
               ),
             );
diff --git a/lib/shared/custom_appbar.dart b/lib/shared/custom_appbar.dart
index d0857a8..f7a6b2d 100644
--- a/lib/shared/custom_appbar.dart
+++ b/lib/shared/custom_appbar.dart
@@ -110,9 +110,16 @@ class CustomAppbar extends StatelessWidget implements PreferredSizeWidget {
                     top: 0,
                     bottom: 0,
                     child: Center(
-                      child: GlassIconButton(
-                        icon: const Icon(Icons.arrow_back_rounded),
-                        onPressed: () => context.pop(),
+                      child: Semantics(
+                        label: '返回',
+                        button: true,
+                        child: Tooltip(
+                          message: '返回',
+                          child: GlassIconButton(
+                            icon: const Icon(Icons.arrow_back_rounded),
+                            onPressed: () => context.pop(),
+                          ),
+                        ),
                       ),
                     ),
                   ),