fix(playlists): the push side spends its own allowance, so a scripted loop cannot drain the shared YouTube budget

push-plan reads the live list and push reads and writes it, both against the
instance-wide budget, and neither had a limit. They now share one per-user
allowance of 20 calls per 10 minutes, far above a person's plan-then-push,
refused as playlist/push_cooldown with a sentence in both languages.

frontend/src/i18n/locales/en/playlists.json

@@ -89,6 +89,7 @@
     "watch_later_not_pushable": "The Watch later list can't be sent to YouTube",
     "watch_later_undeletable": "The Watch later list can't be deleted",
     "youtube_editing_off": "Enable YouTube editing in Settings first",
+    "push_cooldown": "You've synced to YouTube many times just now — give it a few minutes",
     "quota_exceeded": "Not enough YouTube quota left today for this sync",
     "sync_busy": "This playlist is already syncing with YouTube — try again when it finishes",
     "sync_all_busy": "Your playlists are already syncing with YouTube — try again when it finishes"

frontend/src/i18n/locales/hu/playlists.json

@@ -89,6 +89,7 @@
     "watch_later_not_pushable": "A „Megnézem később” listát nem lehet a YouTube-ra küldeni",
     "watch_later_undeletable": "A „Megnézem később” lista nem törölhető",
     "youtube_editing_off": "Előbb engedélyezd a YouTube-szerkesztést a Beállításokban",
+    "push_cooldown": "Az imént sokszor szinkronizáltál a YouTube-ra — várj pár percet",
     "quota_exceeded": "Mára nem maradt elég YouTube-keret ehhez a szinkronhoz",
     "sync_busy": "Ez a lista épp szinkronizál a YouTube-bal — próbáld újra, ha végzett",
     "sync_all_busy": "A listáid épp szinkronizálnak a YouTube-bal — próbáld újra, ha végzett"