perf(playback): keep the history gate off the initial bundle

The `@iptvnator/services` barrel ships in the initial bundle, so adding
PlaybackHistoryGate there (and subscribing to it from the app-wide
ExternalPlaybackService) grew renderer.initialBytes by 1,141 bytes.

- Move the gate to a new lazy-only `playback-data-access` project
  (`@iptvnator/playback/data-access`; scope:shared, domain:playback,
  type:data-access) and register it in the coverage policy.
- The gate subscribes to MPV/VLC session updates itself; it is created by
  the first deferred write, which precedes the launch it waits for.
  ExternalPlaybackService is back to master.
- The Xtream "playlist switched before confirmation" check moves to the
  lazy helper; the initial-path store only takes a `skipListRefresh` flag.

Net effect on this branch: +27 bytes over master (master itself is
108 bytes over the ratchet baseline already).

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

apps/web/src/app/services/external-playback.service.spec.ts

@@ -1,5 +1,3 @@
-import { TestBed } from '@angular/core/testing';
-import { PlaybackHistoryGate } from '@iptvnator/services';
 import { ExternalPlayerSession } from '@iptvnator/shared/interfaces';
 import { ExternalPlaybackService } from './external-playback.service';
 
@@ -42,36 +40,7 @@ describe('ExternalPlaybackService', () => {
             },
         });
 
-        service = TestBed.runInInjectionContext(
-            () => new ExternalPlaybackService()
-        );
-    });
-
-    it('commits deferred history once the external player has opened', () => {
-        const commit = jest.fn();
-        TestBed.inject(PlaybackHistoryGate).defer(
-            { streamUrls: ['https://example.com/video.m3u8'] },
-            commit
-        );
-
-        listener?.(createSession({ status: 'launching' }));
-        expect(commit).not.toHaveBeenCalled();
-
-        listener?.(createSession({ status: 'opened' }));
-        expect(commit).toHaveBeenCalledTimes(1);
-    });
-
-    it('does not commit history for a launch that failed', () => {
-        const commit = jest.fn();
-        TestBed.inject(PlaybackHistoryGate).defer(
-            { streamUrls: ['https://example.com/video.m3u8'] },
-            commit
-        );
-
-        listener?.(createSession({ status: 'launching' }));
-        listener?.(createSession({ status: 'error', error: 'not found' }));
-
-        expect(commit).not.toHaveBeenCalled();
+        service = new ExternalPlaybackService();
     });
 
     it('tracks the latest launch and hides dismissed sessions until the next launch', () => {

apps/web/src/app/services/external-playback.service.ts

@@ -1,5 +1,4 @@
-import { computed, inject, Injectable, signal } from '@angular/core';
-import { PlaybackHistoryGate } from '@iptvnator/services';
+import { computed, Injectable, signal } from '@angular/core';
 import {
     ExternalPlayerSession,
     PlayerContentInfo,
@@ -9,7 +8,6 @@ import {
     providedIn: 'root',
 })
 export class ExternalPlaybackService {
-    private readonly historyGate = inject(PlaybackHistoryGate);
     readonly activeSession = signal<ExternalPlayerSession | null>(null);
     private readonly dismissedSessionId = signal<string | null>(null);
 
@@ -104,12 +102,6 @@ export class ExternalPlaybackService {
     }
 
     private handleSessionUpdate(session: ExternalPlayerSession): void {
-        // MPV/VLC cannot report whether a live stream really plays, so a
-        // successful launch is what commits the deferred history write.
-        if (session.status === 'opened' || session.status === 'playing') {
-            this.historyGate.confirm({ streamUrls: [session.streamUrl] });
-        }
-
         const current = this.activeSession();
         const restoresCurrentReplacement =
             current?.id === session.restoredFromSessionId;