fix(ui): address Greptile review — real fallback asset, untracked overflow measure

default-episode.png never existed (pre-existing in the grid card, copied
into the list thumbs) — both onerror handlers now fall back to the real
default-poster.png. The expandable-text and content-hero measuring
effects read the expanded signal via untracked so toggling show
more/less no longer rebuilds their ResizeObservers.

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

libs/ui/components/src/lib/content-hero/content-hero.component.ts

@@ -7,6 +7,7 @@ import {
     input,
     output,
     signal,
+    untracked,
     viewChild,
     ElementRef,
 } from '@angular/core';
@@ -53,8 +54,13 @@ export class ContentHeroComponent {
             const el = this.descriptionEl()?.nativeElement;
             if (!el) return;
 
-            this.measureOverflow(el);
-            this.observeOverflow(el);
+            // untracked: measureOverflow reads isDescriptionExpanded();
+            // tracking it would re-run this effect (and rebuild the
+            // ResizeObserver) on every expand/collapse click.
+            untracked(() => {
+                this.measureOverflow(el);
+                this.observeOverflow(el);
+            });
         });
 
         this.destroyRef.onDestroy(() => this.resizeObserver?.disconnect());

libs/ui/components/src/lib/expandable-text/expandable-text.component.ts

@@ -6,6 +6,7 @@ import {
     inject,
     input,
     signal,
+    untracked,
     viewChild,
 } from '@angular/core';
 import { MatIconModule } from '@angular/material/icon';
@@ -113,8 +114,13 @@ export class ExpandableTextComponent {
             const el = this.textEl()?.nativeElement;
             if (!el) return;
 
-            this.measureOverflow(el);
-            this.observeOverflow(el);
+            // untracked: measureOverflow reads isExpanded(); tracking it
+            // would re-run this effect (and rebuild the ResizeObserver) on
+            // every toggle click.
+            untracked(() => {
+                this.measureOverflow(el);
+                this.observeOverflow(el);
+            });
         });
 
         this.destroyRef.onDestroy(() => this.resizeObserver?.disconnect());

libs/ui/components/src/lib/season-container/season-container.component.html

@@ -108,7 +108,7 @@
                                         [src]="episodeInfo?.movie_image ?? ''"
                                         (error)="
                                             $event.target.src =
-                                                './assets/images/default-episode.png'
+                                                './assets/images/default-poster.png'
                                         "
                                         alt="Episode thumbnail"
                                         loading="lazy"
@@ -305,7 +305,7 @@
                                             "
                                             (error)="
                                                 $event.target.src =
-                                                    './assets/images/default-episode.png'
+                                                    './assets/images/default-poster.png'
                                             "
                                             alt="Episode thumbnail"
                                             loading="lazy"