refactor(packages)!: replace DelegateMixin & ProxyMixin with MediaHost base classes (#1292)

site/scripts/api-docs-builder/src/media-element-handler.ts

@@ -8,7 +8,8 @@
  *   - Define files: packages/html/src/define/media/*.ts with inline class + static tagName
  *   - Media element classes: packages/html/src/media/{name}/index.ts
  *     composed as MediaPropsMixin(MediaAttachMixin(CustomMedia), Delegate)
- *   - Delegate classes: packages/core/src/dom/media/{name}/index.ts with getter/setter pairs
+ *   - Delegate classes: packages/core/src/dom/media/{name}/index.ts with getter/setter pairs.
+ *     CustomMedia classes use inheritance mixins (e.g., HlsMediaMixin(CustomVideoElement)).
  *   - Shared data: packages/core/src/dom/media/custom-media-element/index.ts
  *     exports Attributes, Events, VideoCSSVars, AudioCSSVars, and template functions
  *   - Slots: parsed from getVideoTemplateHTML / getAudioTemplateHTML in custom-media-element
@@ -454,7 +455,7 @@ function parseSlots(html: string, slots: string[]): void {
 
 /**
  * Determine whether a CustomMedia base class is video or audio by checking
- * the extends clause of the class that defines it (e.g., DelegateMixin(CustomVideoElement, ...)).
+ * the extends clause of the class that defines it (e.g., HlsMediaMixin(CustomVideoElement)).
  */
 function resolveMediaType(
   mediaFilePath: string,

site/scripts/api-docs-builder/src/tests/e2e.test.ts

@@ -1194,7 +1194,7 @@ describe('Media element pipeline (end-to-end)', () => {
   // ─────────────────────────────────────────────────────────────────
   //
   // A media element whose delegate extends another delegate (mirrors
-  // MuxMediaDelegate extending HlsMediaDelegate). The builder must
+  // MuxMediaBase extending HlsMediaBase). The builder must
   // walk the extends chain to include inherited properties. Child
   // properties override parent definitions.
 

site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/core/src/dom/media/complex/index.ts

@@ -1,5 +1,5 @@
 /**
- * Mock complex delegate — mirrors HlsMediaDelegate.
+ * Mock complex delegate — mirrors HlsMediaBase.
  *
  * Exercises: multiple getter/setter pairs with JSDoc descriptions,
  * readonly properties, boolean type, overlap with native Attributes

site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/core/src/dom/media/extending/index.ts

@@ -1,5 +1,5 @@
 /**
- * Mock extending delegate — mirrors MuxMediaDelegate extending HlsMediaDelegate.
+ * Mock extending delegate — mirrors MuxMediaBase extending HlsMediaBase.
  *
  * Exercises: delegate inheritance. The builder must walk the extends chain
  * to extract properties from both this class and its parent (ComplexDelegate).

site/scripts/api-docs-builder/src/tests/fixtures/monorepo/packages/core/src/dom/media/simple/index.ts

@@ -1,5 +1,5 @@
 /**
- * Mock simple delegate — mirrors DashMediaDelegate.
+ * Mock simple delegate — mirrors DashMediaBase.
  *
  * Exercises: minimal delegate with just src (read-write) and engine (readonly).
  * No JSDoc on properties — tests that missing descriptions produce undefined.