Allow current-region takeover of empty draining locks

backend/app.py

@@ -712,23 +712,32 @@ def newserv_account_lock_acquire():
                         "lock": lock_row_payload(row),
                     })
 
-                if row["holder_source"] != source:
-                    return jsonify({
-                        "ok": False,
-                        "message": f"$C6Account is already active\\non {row['holder_source']}.",
-                        "holder_source": row["holder_source"],
-                        "state": row["state"],
-                        "lock": lock_row_payload(row),
-                    })
-
                 sessions = row["sessions"] or {}
                 if isinstance(sessions, str):
                     sessions = json.loads(sessions)
+
+                if row["holder_source"] != source:
+                    target_region_current = False
+                    if row["state"] == "draining" and not sessions and source_region:
+                        _all_current, sync = account_sync_current_on_all_regions(account_id)
+                        region_status = (sync.get("regions") or {}).get(source_region) or {}
+                        target_region_current = region_status.get("status") == "current"
+
+                    if not target_region_current:
+                        return jsonify({
+                            "ok": False,
+                            "message": f"$C6Account is already active\\non {row['holder_source']}.",
+                            "holder_source": row["holder_source"],
+                            "state": row["state"],
+                            "lock": lock_row_payload(row),
+                        })
+
                 sessions[session_nonce] = session_info
 
                 cur.execute("""
                     UPDATE account_session_locks
-                    SET state = 'active',
+                    SET holder_source = %s,
+                        state = 'active',
                         source_region = %s,
                         source_ship = %s,
                         account_store = %s,
@@ -739,6 +748,7 @@ def newserv_account_lock_acquire():
                     RETURNING account_id, holder_source, source_region, source_ship,
                               account_store, state, sessions, created_at, updated_at, expires_at
                 """, (
+                    source,
                     source_region,
                     source_ship,
                     account_store,
@@ -780,7 +790,7 @@ def newserv_account_lock_heartbeat():
                 SET updated_at = now(),
                     expires_at = %s
                 WHERE holder_source = %s
-                  AND state IN ('active', 'draining')
+                  AND state = 'active'
             """, (expires_at, source))
             refreshed = cur.rowcount