Remove temporary Media Session interceptor and Video Event Log diagnostics

Clean up the exploratory Disney+ diagnostics now that the Shadow DOM
timeline/seek integration is in place:

- Remove Proposal 1 (Media Session interceptor): the background.js
  interceptor injection and the content.js message listener capturing
  __koalaMediaSessionCapture, plus the now-unused mediaSessionPosition
  reporting in content.js and popup.js.
- Remove Proposal 3 (Video Event Log): videoEventsLog, logVideoEvent(),
  the per-video event logging listeners, and the popup.html/popup.js UI.
- Keep Proposal 2 (DOM timestamp scraper) for ongoing diagnostics.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

extension/content.js

@@ -62,7 +62,6 @@
 
     // Suppresses native event reporting after a programmatic action.
 
-    // Each entry is a per-type timer (key = 'playing'|'paused'|'seek').
     // Each entry is a per-type timer (key = 'playing'|'paused'|'seek').
 
     // While a timer exists, matching native events are consumed and not relayed.
@@ -1445,9 +1444,7 @@
 
     function applyAudioSettings(videoEl, settings) {
 
-        const mergedSettings = mergeAudioSettings(settings);
         const mergedSettings = mergeAudioSettings(settings);
-        if (!mergedSettings.enabled || !mergedSettings.compressor?.enabled) {
 
         if (!mergedSettings.enabled || !mergedSettings.compressor?.enabled) {
 
@@ -1459,9 +1456,7 @@
 
 
 
-        if (!chain) return;
         const chain = setupAudioChain(videoEl);
-
 
         if (!chain) return;
 
@@ -1752,21 +1747,6 @@
             checkAndReportLobbyReady(expectedTitle);
 
         }, 2000);
-
-
-
-    function stopLobbyPoll() {
-
-        _pendingLobbyTitle = null;
-
-        if (lobbyPollTimer) {
-
-            clearInterval(lobbyPollTimer);
-
-            lobbyPollTimer = null;
-
-        }
-
 
     }
 
@@ -1782,14 +1762,6 @@
 
             clearInterval(lobbyPollTimer);
 
-            }
-        ];
-    }
-
-    function getActivePlayerActionFix() {
-        return getPlayerActionFixes().find(fix => matchesPlayerUrls(fix.urls)) || null;
-    }
-
             lobbyPollTimer = null;
 
         }
@@ -1947,14 +1919,6 @@
     }
 
 
-            if (video) applyAudioSettings(video, _audioSettings);
-
-            sendResponse({ ok: true });
-
-            return true;
-
-        }
-
 
     // Listen for commands from background.js