Add lower-corner layouts, custom blur backgrounds, and classic blur fill.

Ship composition families, optional background images for lower-corner templates, and an optional blurred cover fill for classic letterbox.

lib/types.ts

@@ -22,6 +22,12 @@ export type ItemMetadata = {
    * When omitted, the job-level shared imagePath is used.
    */
   imagePath?: string | null;
+  /**
+   * Optional full-frame background for LOWER_LEFT / LOWER_RIGHT templates.
+   * Blur/opacity apply to this image; cover stays the sharp corner square.
+   */
+  backgroundImagePath?: string | null;
+  background_image_path?: string | null;
   /** Custom branding watermark settings. */
   watermark?: Partial<WatermarkSettings> | null;
   /** Artist line for art-track layouts (on-video only). */
@@ -31,20 +37,27 @@ export type ItemMetadata = {
   /**
    * Art-track layout. Prefer camelCase; snake_case aliases accepted:
    * layout_template, blur_amount, text_padding.
+   * `template`: COVER_LEFT_TEXT_RIGHT | COVER_TOP_TEXT_BOTTOM |
+   * COVER_RIGHT_TEXT_LEFT | CENTERED_COMPACT | LOWER_LEFT_COVER_TEXT |
+   * LOWER_RIGHT_COVER_TEXT (also listed on GET /api/v1 → layoutTemplates).
    */
   layout?: Partial<LayoutSettings> & {
     layoutTemplate?: string | null;
     layout_template?: string | null;
+    blur_fill?: boolean;
     blur_amount?: number;
     blur_opacity?: number;
     text_padding?: number;
     title_artist_gap?: number;
     text_offset_x?: number;
     text_offset_y?: number;
+    title_bold?: boolean;
   } | null;
   /** Flat aliases (also accepted). */
   layoutTemplate?: string | null;
   layout_template?: string | null;
+  blurFill?: boolean;
+  blur_fill?: boolean;
   blurAmount?: number;
   blur_amount?: number;
   blurOpacity?: number;
@@ -57,6 +70,8 @@ export type ItemMetadata = {
   text_offset_x?: number;
   textOffsetY?: number;
   text_offset_y?: number;
+  titleBold?: boolean;
+  title_bold?: boolean;
 };
 
 export type UploadedAudio = {