fix(ui): app-prefix detail template directive selectors, build fixes

detailTags/detailMeta/detailActions → appDetailTags/appDetailMeta/
appDetailActions per @angular-eslint/directive-selector; type the
Escape host listener as Event; drop a redundant ?? in season tabs.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/architecture/embedded-inline-playback.md

@@ -101,8 +101,8 @@ which owns the page scroll container and two layout states:
 
 Contracts:
 
-- Hosts provide hero chips/meta/actions as `*detailTags` / `*detailMeta` /
-  `*detailActions` templates; the shell stamps them into the hero and again
+- Hosts provide hero chips/meta/actions as `*appDetailTags` / `*appDetailMeta` /
+  `*appDetailActions` templates; the shell stamps them into the hero and again
   into the About block. Degradation stays "missing → not rendered".
 - The shell never wraps the `[detail-player]` slot in a conditional; the
   host's `@if (inlinePlayback())` is the only creator/destroyer of the