live: EXTERNAL_SERVICE_TOKEN precedence, baked A/B candidates, model|gpu ledger from task/page modelId+gpuType, string total fix, Iluvatar/MTT enums (59 tests)

src/strategy.py

@@ -12,10 +12,10 @@ from typing import Optional
 
 # Community alias order (level C); we only check presence, never echo values.
 _TOKEN_ENV_KEYS = (
+    "EXTERNAL_SERVICE_TOKEN",
     "XC_TOKEN_FILE",
     "XC_TOKEN",
     "MODELHUB_XC_TOKEN",
-    "EXTERNAL_SERVICE_TOKEN",
 )
 
 
@@ -62,20 +62,9 @@ def _token_from_file(path: str) -> bool:
 
 def external_service_token_present() -> bool:
     """Whether any known token env / file alias is present (boolean only)."""
-    for key in _TOKEN_ENV_KEYS:
-        raw = os.environ.get(key)
-        if raw is None:
-            continue
-        value = raw.strip()
-        if not value:
-            continue
-        if key == "XC_TOKEN_FILE":
-            if _token_from_file(value):
-                return True
-            continue
-        # Reject obvious placeholders (community practice, level C)
-        lowered = value.lower()
-        if lowered in ("tmp", "placeholder", "changeme", "xxx"):
-            continue
+    from .task_add_client import resolve_token_with_source
+    try:
+        resolve_token_with_source()
         return True
-    return False
+    except (ValueError, OSError, UnicodeError):
+        return False