feat(epg): copy catch-up programme URLs without changing playback

docs/architecture/m3u-playlist-module.md

@@ -1123,6 +1123,23 @@ class EpgService {
   for a programme the user clicked, both hosts surface a
   `EPG.TIMELINE.CATCHUP_FAILED` snackbar instead of doing nothing.
 
+### Copy archive URL
+
+Programme details opened from the EPG timeline or list offer **Copy archive
+URL** when catch-up is available. Xtream Live TV, M3U playback and their
+Favorites/Recent live tabs resolve the same URL as archive playback without
+selecting a programme or changing the player. Stalker and unsupported/expired
+archive entries expose no copy action. The full M3U guide currently has no
+catch-up capability and therefore does not expose this action.
+
+The URL can contain account credentials; the dialog explains that external
+players may also need the source's HTTP headers. Copy is explicit, errors use
+localized feedback without raw URLs, and repeated clicks share one pending
+copy operation. Timeline/list dialogs capture the host's source/channel
+`archiveContextKey`, refuse actions after it changes, and unsubscribe when
+the view is destroyed. A copied M3U start-over URL need not stop at the programme's
+end. Copying a URL does not download or preserve an expiring archive.
+
 ### Programme guide
 
 `app-epg-guide` (`libs/ui/epg/src/lib/epg-guide/`) is a host-agnostic

docs/architecture/xtream-portal-compatibility.md

@@ -257,6 +257,11 @@ tab can gate the timeline's archive window. `tv_archive_duration` is
 interpreted as **days** everywhere, matching
 `live-stream-layout.controlledArchiveDays` (issue #1138).
 
+Programme details in the Live TV and Favorites/Recent EPG timeline/list also
+offer **Copy archive URL**. This uses the same resolver and persisted server
+timezone without changing playback. See the M3U module's "Copy archive URL"
+contract for clipboard feedback and credential/header handling.
+
 ### Start time is the panel's clock, not the viewer's
 
 The `{start}` segment (`Y-m-d:H-M`) is read by the panel with `strtotime()`