fix: align cmhub image timeout display

app/ai.py

@@ -38,6 +38,7 @@ class CMHubError(AIError):
 
 CMHUB_IMAGE_MAX_BYTES = 20 * 1024 * 1024
 CMHUB_TITLE_READ_TIMEOUT_SECONDS = 600
+CMHUB_IMAGE_READ_TIMEOUT_SECONDS = 650
 
 _RESOLUTION_SIZES = {
     "512": (512, 512),
@@ -766,15 +767,7 @@ def _normalize_cmhub_resolution(resolution):
 
 
 def _cmhub_read_timeout(config, resolution):
-    try:
-        timeout = int(appconfig.response_timeout(config))
-    except Exception:
-        timeout = 600
-    resolution_key = str(resolution or "").strip().lower()
-    timeouts = appconfig.ai_config(config).get("resolution_timeouts", {})
-    if resolution_key in timeouts:
-        timeout = int(timeouts[resolution_key])
-    return min(600, max(1, timeout))
+    return CMHUB_IMAGE_READ_TIMEOUT_SECONDS
 
 
 def _cmhub_call_with_retry(