fix: inherit default config (#38089)

* fix: inherit default config

* test: add test case

components/config-provider/__tests__/theme.test.tsx

@@ -134,4 +134,26 @@ describe('ConfigProvider.Theme', () => {
       ),
     ).toBeTruthy();
   });
+
+  it('hashed should be true if not changed', () => {
+    let hashId = 'hashId';
+
+    theme.defaultConfig.hashed = true;
+
+    const Demo = () => {
+      const [, , hash] = useToken();
+      hashId = hash;
+      return null;
+    };
+
+    render(
+      <ConfigProvider theme={{ components: { InputNumber: { handleWidth: 50.1234 } } }}>
+        <Demo />
+      </ConfigProvider>,
+    );
+
+    expect(hashId).not.toBe('');
+
+    theme.defaultConfig.hashed = false;
+  });
 });

components/config-provider/hooks/useTheme.ts

@@ -2,13 +2,14 @@ import useMemo from 'rc-util/lib/hooks/useMemo';
 import shallowEqual from 'shallowequal';
 import type { OverrideToken } from '../../theme/interface';
 import type { ThemeConfig } from '../context';
+import { defaultConfig } from '../../theme';
 
 export default function useTheme(
   theme?: ThemeConfig,
   parentTheme?: ThemeConfig,
 ): ThemeConfig | undefined {
   const themeConfig = theme || {};
-  const parentThemeConfig = parentTheme || {};
+  const parentThemeConfig: ThemeConfig = parentTheme || defaultConfig;
 
   const mergedTheme = useMemo<ThemeConfig | undefined>(
     () => {
@@ -17,19 +18,19 @@ export default function useTheme(
       }
 
       // Override
-      const mergedOverride = {
+      const mergedComponents = {
         ...parentThemeConfig.components,
       };
 
       Object.keys(theme.components || {}).forEach((componentName: keyof OverrideToken) => {
-        mergedOverride[componentName] = {
-          ...mergedOverride[componentName],
+        mergedComponents[componentName] = {
+          ...mergedComponents[componentName],
           ...theme.components![componentName],
         } as any;
       });
 
       // Base token
-      const merged = {
+      return {
         ...parentThemeConfig,
         ...themeConfig,
 
@@ -37,10 +38,8 @@ export default function useTheme(
           ...parentThemeConfig.token,
           ...themeConfig.token,
         },
-        override: mergedOverride,
+        components: mergedComponents,
       };
-
-      return merged;
     },
     [themeConfig, parentThemeConfig],
     (prev, next) =>