chore: update changeset for component token customization

Author: wangdicoder

.changeset/migrate-scss-to-css-custom-properties.md

@@ -3,4 +3,10 @@
 "@tiny-design/tokens": minor
 ---
 
-Migrate component styles from SCSS variables to CSS custom properties (`--ty-*`) for better runtime theming support. Add new theme tokens for color-picker, list, speed-dial, and avatar components.
+Migrate component styles from SCSS variables to CSS custom properties (`--ty-*`) for better runtime theming support.
+
+- Migrate ~80 structural SCSS constants (padding, sizing, transitions) to runtime-customizable CSS custom properties
+- Tokenize hardcoded values in Button, Input, Card, Select, and Notification components
+- Add component-scoped CSS variable fallback chains (e.g., `--ty-btn-border-radius` falls back to `--ty-border-radius`)
+- Add `ThemeConfig` API to `ConfigProvider` for programmatic token and component-level overrides
+- Three-level customization: global tokens, component tokens, and scoped instance overrides via CSS