debug(sync): diag inclut la chaîne mine=true (id+titre) pour comparaison

server/index.mjs

@@ -108,7 +108,7 @@ import {
   fetchGoogleLiked, fetchTwitchProfile, fetchTwitchFollows, hasGoogleWriteScope,
   fetchGoogleWatchLater, pushGoogleWatchLater, fetchInnerTubeHistory,
   fetchInnerTubeWatchLaterViaLib, pushInnerTubeWatchLater, fetchGoogleWatchLaterId,
-  fetchAccountChannels, diagnoseInnertube,
+  fetchAccountChannels, diagnoseInnertube, fetchMineChannel,
 } from './oauth.mjs';
 import { getSearchMode, getYtDlpBin, hasCookiesFile, metricsSnapshot } from './providers/youtube-common.mjs';
 import { ytScrapeCacheStats } from './providers/youtube.mjs';
@@ -590,6 +590,11 @@ r.get('/oauth/google/diag', authMiddlewareCookieAware, oauthLimiter, async (req,
   try {
     const conn = await freshOAuthToken(req.user.id, 'google');
     const dataApi = {};
+    try {
+      dataApi.mineChannel = await fetchMineChannel(conn.accessToken);
+    } catch (e) {
+      dataApi.mineChannel = { error: String(e?.message || '').slice(0, 80) };
+    }
     try {
       await fetchGoogleWatchLaterId(conn.accessToken);
       dataApi.watchLaterId = true;