fix(input-number): peers theme can't be configured, closes #3422 (#3439)

CHANGELOG.en-US.md

@@ -9,6 +9,7 @@
 - Fix `n-pagination`'s' `default-page-size` prop doesn't follows `page-sizes` prop, closes [#3369](https://github.com/TuSimple/naive-ui/issues/3369).
 - Added `exports` field in package.json [#3410](https://github.com/TuSimple/naive-ui/pull/3410).
 - Fix `n-dropdown` option prefix & suffix's z-index, closes [#3433](https://github.com/TuSimple/naive-ui/issues/3433).
+- Fix `n-input-number`'s peers theme can't be configured, closes [#3422](https://github.com/TuSimple/naive-ui/issues/3422).
 
 ### Feats
 

CHANGELOG.zh-CN.md

@@ -9,6 +9,7 @@
 - 修复 `n-pagination` 的 `default-page-size` 没有跟随 `page-sizes` prop，关闭 [#3369](https://github.com/TuSimple/naive-ui/issues/3369)
 - 在 package.json 中新增 `exports` [3410](https://github.com/TuSimple/naive-ui/pull/3410)
 - 修复 `n-dropdown` 选项 prefix & suffix 的 z-index，关闭 [#3433](https://github.com/TuSimple/naive-ui/issues/3433)
+- 修复 `n-input-number` 中配置 peers 主题不生效，关闭 [#3422](https://github.com/TuSimple/naive-ui/issues/3422)
 
 ### Feats
 

src/input-number/src/InputNumber.tsx

@@ -620,6 +620,8 @@ export default defineComponent({
           text
           disabled={!this.minusable || this.mergedDisabled || this.readonly}
           focusable={false}
+          theme={this.mergedTheme.peers.Button}
+          themeOverrides={this.mergedTheme.peerOverrides.Button}
           builtinThemeOverrides={this.buttonThemeOverrides}
           onClick={this.handleMinusClick}
           onMousedown={this.handleMinusMousedown}
@@ -644,6 +646,8 @@ export default defineComponent({
           text
           disabled={!this.addable || this.mergedDisabled || this.readonly}
           focusable={false}
+          theme={this.mergedTheme.peers.Button}
+          themeOverrides={this.mergedTheme.peerOverrides.Button}
           builtinThemeOverrides={this.buttonThemeOverrides}
           onClick={this.handleAddClick}
           onMousedown={this.handleAddMousedown}

src/tree/src/Tree.tsx

@@ -1503,8 +1503,8 @@ export default defineComponent({
             ? resolveSlot(this.$slots.empty, () => [
                 <NEmpty
                   class={`${mergedClsPrefix}-tree__empty`}
-                  theme={this.theme?.peers?.Empty}
-                  themeOverrides={this.themeOverrides?.peers?.Empty}
+                  theme={this.mergedTheme.peers.Empty}
+                  themeOverrides={this.mergedTheme.peerOverrides.Empty}
                 />
             ])
             : fNodes.map(createNode)}