Add log-only BB account sync login hook

src/AccountSync.hh

@@ -35,4 +35,17 @@ inline void notify_player_state_saved(
       filename.c_str());
 }
 
+inline void notify_bb_login_start(
+    uint32_t account_id,
+    const std::string& bb_username,
+    int64_t character_slot,
+    uint8_t connection_phase) {
+  std::fprintf(stderr,
+      "[AccountSync] event=bb_login_start account_id=%010u bb_username=%s character_slot=%lld connection_phase=%u\n",
+      static_cast<unsigned int>(account_id),
+      bb_username.c_str(),
+      static_cast<long long>(character_slot),
+      static_cast<unsigned int>(connection_phase));
+}
+
 } // namespace AccountSync

src/ReceiveCommands.cc

@@ -27,6 +27,7 @@
 #include "StaticGameData.hh"
 #include "Text.hh"
 #include "BrutalPeeps.hh"
+#include "AccountSync.hh"
 
 const char* BATTLE_TABLE_DISCONNECT_HOOK_NAME = "battle_table_state";
 const char* QUEST_BARRIER_DISCONNECT_HOOK_NAME = "quest_barrier";
@@ -1672,6 +1673,14 @@ static asio::awaitable<void> on_93_BB(std::shared_ptr<Client> c, Channel::Messag
     co_return;
   }
 
+  if (c->login->account && c->login->bb_license) {
+    AccountSync::notify_bb_login_start(
+        c->login->account->account_id,
+        c->login->bb_license->username,
+        c->bb_character_index,
+        c->bb_connection_phase);
+  }
+
   std::string version_string = c->bb_client_config.as_string();
   phosg::strip_trailing_zeroes(version_string);
   // If the version std::string starts with "Ver.", assume it's Sega and apply the normal version encoding logic. Otherwise,