feat(playback): recommend recovery actions (#1374)

* docs(playback): design recovery recommendations

* docs(playback): plan recovery recommendations

* refactor(playback): extract diagnostic utilities

* feat(playback): define recovery recommendation contracts

* feat(playback): rank recovery recommendations

* feat(playback): track session recovery attempts

* feat(playback): identify content recovery sessions

* feat(ui): add ranked playback diagnostic panel

* feat(playback): switch temporarily to recommended players

* test(playback): cover temporary player recommendation

* test(playback): verify recommendation capability guards

* docs(playback): document recovery recommendations

* fix(playback): keep recovery keys credential-free

* fix(playback): remove derived tracking ownership

* fix(playback): preserve distinct recovery fallbacks

* fix(playback): reset resume for new sources

* fix(playback): preserve desktop recovery guidance

* docs(playback): clarify recovery policy exceptions

* fix(playback): reject stale progress updates

* fix(playback): keep protected recovery guidance neutral

* test(playback): cover stale progress output

* fix(playback): neutralize protected diagnostic copy

* fix(playback): harden runtime guidance ownership

* fix(playback): stabilize recovery application ownership

* fix(ci): classify playback util coverage

* fix(e2e): preserve playback fixture bytes

.changes/playback-recovery-recommendations.md

@@ -0,0 +1,10 @@
+---
+type: fix
+area: playback
+issues: [1159]
+---
+
+When playback fails, IPTVnator now ranks useful next steps from the reported
+error, including another compatible built-in player, MPV/VLC, Retry, or another
+source. Trying a built-in recommendation affects only the current item and
+does not change the saved player setting.

.changes/playback-runtime-guidance-fixes.md

@@ -0,0 +1,6 @@
+---
+type: fix
+area: playback
+---
+
+Playback recovery now removes old error actions as soon as a new source or player starts, even while Electron prepares stream headers. Stalker series playing inline now picks up refreshed episode names and navigation, and safely disables episode commands if the playing episode disappears.

.changes/playback-stable-session-ownership.md

@@ -0,0 +1,9 @@
+---
+type: fix
+area: playback
+issues: [1159]
+---
+
+Playback recovery no longer crosses into a different selected channel, movie,
+or exact Stalker episode. Switching content while a stream resolves no longer
+restores stale playback or shows an error from the previous selection.