fix(ui): season list rows and both theme contexts follow the progress token

Review round 1:
- Codex: season list mode drew its episode bar with --mat-sys-primary;
  `.episode-list-item__progress-fill` now reads --app-progress-color, with
  a spec (the grid mode already goes through the capsule).
- Greptile: nothing pinned the token's `.dark-theme` re-declaration, so
  dropping it would have left every spec green while dark mode inherited
  the light colour. `m3-theme.spec.ts` (web) asserts the declaration in
  both theme contexts.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

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

@@ -671,7 +671,7 @@ app-season-tabs {
 
     &__progress-fill {
         height: 100%;
-        background: var(--mat-sys-primary);
+        background: var(--app-progress-color);
         border-radius: 2px;
         transition: width 0.3s ease;
     }

libs/ui/components/src/lib/season-container/season-container.progress-colour.spec.ts

@@ -0,0 +1,27 @@
+import { readFileSync } from 'node:fs';
+import { resolve } from 'node:path';
+
+// Watch progress in app chrome reads one theme token in both season view
+// modes; the list rows draw their own fill rather than the grid's capsule
+// (see the UI guidelines' Progress Bars section).
+const DIR = resolve(
+    process.cwd(),
+    'libs/ui/components/src/lib/season-container'
+);
+
+function read(file: string): string {
+    return readFileSync(resolve(DIR, file), 'utf8');
+}
+
+describe('season container watch-progress colour', () => {
+    it('fills list rows with the app watch-progress token', () => {
+        const styles = read('season-container.component.scss');
+        const listItem = styles.slice(styles.indexOf('.episode-list-item {'));
+        const fill = listItem.match(/&__progress-fill\s*\{([^}]*)\}/)?.[1];
+
+        expect(read('season-container.component.html')).toContain(
+            'class="episode-list-item__progress-fill"'
+        );
+        expect(fill).toMatch(/background:\s*var\(--app-progress-color\);/);
+    });
+});