feat: add strip country prefix setting (#1162)

* feat: add strip country prefix setting

* feat: scope country-prefix stripping to live content and cover missing surfaces

- narrow the heuristic: pipes always strip, dash/colon separators only
  when the prefix is a short uppercase tag ("UK - BBC One" strips,
  "Sky - Sports F1" and "Mission: Impossible - Fallout" stay intact)
- fall back to the original name when stripping would leave nothing
- scope stripping to live content only: grid type (live/itv/radio),
  playback isLive, external sessions without contentInfo, dashboard
  cards with contentType 'live'
- cover previously missed surfaces: M3U player EPG timeline header,
  M3U inline player title, radio player, dashboard live rails
- replace hardcoded settings strings with translate keys and add
  SETTINGS.STRIP_COUNTRY_PREFIX(_DESCRIPTION) to all 18 locales
- add unit specs for the utility plus regression specs for
  channel-list-item and external-playback-dock

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

* test: cover strip-country-prefix call sites for codecov

- dashboard-rail: new spec for cardTitle live/movie/series scoping
- grid-list: strip enabled/disabled, VOD passthrough, 'No name' fallback
- portal-inline-player: live strip vs VOD passthrough
- unified-live-tab: timeline channel name strip + M3U name precedence
- video-player: timeline/radio/inline titles with the setting on and off
- settings-store: default false + persisted true round-trip
- settings-form.utils: new spec for form default and ?? false fallback

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

---------

Co-authored-by: 4gray <serega05@gmail.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

apps/web/src/app/settings/settings-general-section.component.html

@@ -156,4 +156,16 @@
             <mat-checkbox formControlName="showCaptions"></mat-checkbox>
         </div>
     </div>
+
+    <div class="setting-item">
+        <div class="setting-item__meta">
+            <h4>{{ 'SETTINGS.STRIP_COUNTRY_PREFIX' | translate }}</h4>
+            <p>
+                {{ 'SETTINGS.STRIP_COUNTRY_PREFIX_DESCRIPTION' | translate }}
+            </p>
+        </div>
+        <div class="setting-item__control setting-item__toggle">
+            <mat-checkbox formControlName="stripCountryPrefix"></mat-checkbox>
+        </div>
+    </div>
 </section>