diff --git a/app/burnin/stages.py b/app/burnin/stages.py
index c657368..5fa32ca 100644
--- a/app/burnin/stages.py
+++ b/app/burnin/stages.py
@@ -556,7 +556,7 @@ async def _stage_surface_validate_ssh(job_id: int, devname: str, drive_id: int)
                 _push_update()
 
                 async def _drain(stream, is_stderr: bool):
-                    nonlocal bad_blocks_total, pid_seen
+                    nonlocal bad_blocks_total, pid_seen, last_db_write_ts, last_pct_sample
                     # Line-based drain. The wrapped badblocks command
                     # pipes through `tr '\b' '\n'` at the shell level
                     # so every progress update is a real newline-
diff --git a/app/config.py b/app/config.py
index 351ee4a..51d8766 100644
--- a/app/config.py
+++ b/app/config.py
@@ -86,7 +86,7 @@ class Settings(BaseSettings):
     ssh_key: str = ""             # PEM private key content (paste full key including headers)
 
     # Application version — used by the /api/v1/updates/check endpoint
-    app_version: str = "1.0.0-58"
+    app_version: str = "1.0.0-59"
 
     # ---- Authentication (1.0.0-22) ----
     # session_secret: HMAC key for signing session cookies. Empty = generate