Fix episode context menu focus

[rovkinmax]

Task Summary

• Fixes focus handoff for episode/season context menus in details and player episode panels.
• Keeps EpisodesPanel focus containment by default, and only allows focus to leave the panel while an episode context menu is open.
• Updated both EpisodesPanel call sites found by search: details seasons list and player settings episodes list.

Compliance Review

Passed. Rule sources checked: root AGENTS.md, .kent/commands/compliance-review.md, .kent/project-contract.md, PUB-2 task body, and .todo/bugfix-season-context-menu-focus/diagnosis.md. Reviewed diff contains only:

• app/src/main/java/com/kino/puber/ui/feature/player/component/EpisodesPanel.kt
• app/src/main/java/com/kino/puber/ui/feature/details/component/DetailsScreenContent.kt
• app/src/main/java/com/kino/puber/ui/feature/player/component/PlayerSettingsPanels.kt

No compliance findings were reported.

Verification

• ./tools/agentw :app:compileDevDebugKotlin - passed (BUILD SUCCESSFUL, configuration cache reused).
• Post-fix UI evidence reviewed in .todo/bugfix-season-context-menu-focus/: menu focus lands on the context-menu action, DPAD down moves within the menu, dismissal returns focus to the episode card, and normal no-menu left containment remains active.
• rg "EpisodesPanel\\(" app/src/main/java/com/kino/puber/ui/feature confirmed both production call sites were updated.

Skipped Checks / Blockers

• This PR shipping step did not rerun build or device smoke checks; it used the already completed implementation, verification, and mandatory Compliance Review evidence.
• .kent/commands/ship-pr.md was missing in this PUB-2 worktree. For shipping procedure, I followed the project contract and the equivalent command file present in sibling Puber worktrees.