style: polish UI and improve UX

src/lib/style-presets.ts

@@ -0,0 +1,16 @@
+export const STYLE_PRESETS = [
+  {
+    value: 'horror-suspense',
+    label: '恐怖悬疑',
+    description: '压迫氛围',
+  },
+] as const
+
+export type StylePresetOption = (typeof STYLE_PRESETS)[number]
+export type StylePresetValue = StylePresetOption['value']
+
+export const DEFAULT_STYLE_PRESET_VALUE: StylePresetValue = 'horror-suspense'
+
+export function getStylePresetOption(value: string): StylePresetOption {
+  return STYLE_PRESETS.find((preset) => preset.value === value) ?? STYLE_PRESETS[0]
+}