feat(title): preset card preview shows user-selected font family

apps/web/src/pages/generate/components/title/TitlePresetsGrid.tsx

@@ -13,9 +13,15 @@ interface TitlePresetsGridProps {
   presets: TitlePresetItem[]
   activePreset: string | null
   onApply: (presetKey: string) => void
+  fontFamily?: string
 }
 
-const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({ presets, activePreset, onApply }) => {
+const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({
+  presets,
+  activePreset,
+  onApply,
+  fontFamily,
+}) => {
   return (
     <div className="xx-title-presets-grid">
       {presets.map((p) => {
@@ -27,7 +33,10 @@ const TitlePresetsGrid: React.FC<TitlePresetsGridProps> = ({ presets, activePres
             onClick={() => onApply(p.key)}
             title={p.label}
           >
-            <span className="xx-title-preset-preview-text" style={p.previewStyle}>
+            <span
+              className="xx-title-preset-preview-text"
+              style={{ ...p.previewStyle, ...(fontFamily ? { fontFamily } : {}) }}
+            >
               标题
             </span>
             <span className="xx-title-preset-card-label">{p.label}</span>