完成Mixer功能的设计。

src/pages/Mixer.tsx

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+import cx from 'clsx';
+import { useMemo, useState } from 'react';
+import { useColorFunction } from '../ColorFunctionContext';
+import { ColorPicker } from '../components/ColorPicker';
+import { FlexColorStand } from '../components/FlexColorStand';
+import { HSegmentedControl } from '../components/HSegmentedControl';
+import { LabeledPicker } from '../components/LabeledPicker';
+import { ScrollArea } from '../components/ScrollArea';
+import styles from './Mixer.module.css';
+
+export function Mixer() {
+  const { colorFn } = useColorFunction();
+  const [basicColor, setBasicColor] = useState('000000');
+  const [mixColor, setMixColor] = useState('000000');
+  const [mixRatio, setMixRatio] = useState(0);
+  const [mode, setMode] = useState<'hex' | 'rgb' | 'hsl' | 'lab' | 'oklch'>('hex');
+  const mixedColor = useMemo(() => {
+    try {
+      if (!colorFn) {
+        return '000000';
+      }
+      const mixed = colorFn.mix(basicColor, mixColor, mixRatio / 100);
+      return mixed;
+    } catch (e) {
+      console.error('[Mix Color]', e);
+    }
+    return '000000';
+  }, [basicColor, mixColor, mixRatio]);
+
+  return (
+    <div className={cx('workspace', styles.mixer_workspace)}>
+      <header>
+        <h3>Color Mixer</h3>
+        <p>Make a new color by mixing two colors.</p>
+      </header>
+      <ScrollArea enableY>
+        <div className={styles.mixer_content}>
+          <div className={styles.mixer_column}>
+            <h5>Basic Color</h5>
+            <ColorPicker color={basicColor} onSelect={setBasicColor} />
+          </div>
+          <div className={styles.mixer_column}>
+            <h5>Mix Color</h5>
+            <ColorPicker color={mixColor} onSelect={setMixColor} />
+            <LabeledPicker
+              title="Mix Ratio"
+              value={mixRatio}
+              onChange={setMixRatio}
+              min={0}
+              max={100}
+              step={1}
+              unit="%"
+            />
+          </div>
+          <div className={styles.mixer_column}>
+            <h5>Mix Result</h5>
+            <div className={styles.colors_booth}>
+              <FlexColorStand color={mixedColor} valueMode={mode} />
+            </div>
+            <div className={styles.color_value_mode}>
+              <label>Copy color value in</label>
+              <HSegmentedControl
+                options={[
+                  { label: 'HEX', value: 'hex' },
+                  { label: 'RGB', value: 'rgb' },
+                  { label: 'HSL', value: 'hsl' },
+                  { label: 'LAB', value: 'lab' },
+                  { label: 'OKLCH', value: 'oklch' },
+                ]}
+                value={mode}
+                onChange={setMode}
+              />
+            </div>
+          </div>
+        </div>
+      </ScrollArea>
+    </div>
+  );
+}