fix(sources): decode nested URLs before classifying; narrow Xtream paths

- A URL nested in a parameter or path segment is percent-decoded one
  round at a time until it reads as a URL or parameter list, so one
  encoded twice is cleaned too; a value still encoded after the last
  round is dropped. The name check unwraps nested values the same way.
- The two segments after `/live/` and its siblings count as an account
  only when a stream follows them, so a playlist path such as
  `/live/news/list.m3u` keeps its file name in the URL and the title.
- Adding a playlist from the phone drawer closes the drawer first, so
  two focus-trapped modals never stack.

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

libs/workspace/shell/feature/src/lib/workspace-sources-filters-panel/workspace-sources-filters-panel.component.spec.ts

@@ -7,7 +7,10 @@ import { SourceStatusService } from '@iptvnator/portal/shared/data-access';
 import { SourceRemovalService } from '@iptvnator/playlist/shared/ui';
 import { SourcesViewStateService } from '@iptvnator/playlist/shared/util';
 import { PlaylistMeta } from '@iptvnator/shared/interfaces';
-import { WORKSPACE_SHELL_ACTIONS } from '@iptvnator/workspace/shell/util';
+import {
+    WORKSPACE_SHELL_ACTIONS,
+    WorkspaceShellContextDrawerService,
+} from '@iptvnator/workspace/shell/util';
 import { WorkspaceSourcesFiltersPanelComponent } from './workspace-sources-filters-panel.component';
 
 const PLAYLISTS = [
@@ -137,7 +140,13 @@ describe('WorkspaceSourcesFiltersPanelComponent', () => {
         expect(rows(element)).toHaveLength(4);
     });
 
-    it('adds a playlist from the header', () => {
+    it('adds a playlist from the header, closing the phone drawer first', () => {
+        const drawer = TestBed.inject(WorkspaceShellContextDrawerService);
+        drawer.open();
+        let drawerOpenAtDialog: boolean | null = null;
+        openAddPlaylistDialog.mockImplementation(() => {
+            drawerOpenAtDialog = drawer.isOpen();
+        });
         const element = render();
         element
             .querySelector<HTMLButtonElement>(
@@ -145,5 +154,7 @@ describe('WorkspaceSourcesFiltersPanelComponent', () => {
             )
             ?.click();
         expect(openAddPlaylistDialog).toHaveBeenCalled();
+        // Two focus-trapped modals must not stack.
+        expect(drawerOpenAtDialog).toBe(false);
     });
 });

libs/workspace/shell/feature/src/lib/workspace-sources-filters-panel/workspace-sources-filters-panel.component.ts

@@ -137,6 +137,9 @@ export class WorkspaceSourcesFiltersPanelComponent {
     }
 
     addPlaylist(): void {
+        // On a phone the drawer is a focus-trapped modal of its own: it must
+        // not stay open under the dialog.
+        this.contextDrawer?.close();
         this.workspaceActions?.openAddPlaylistDialog();
     }
 }