feat: use system curl for cmhub image downloads

app/appconfig.py

@@ -83,6 +83,7 @@ DEFAULT_CONFIG = {
             "image_alias": "",
             "connect_timeout": 10,
             "use_system_proxy": False,
+            "download_with_curl": "auto",
             "check_balance_before_batch": False,
         },
         "title_concurrency": 4,
@@ -375,6 +376,9 @@ def _normalize_config_values(config):
         cmhub = ai.get("cmhub")
         if isinstance(cmhub, dict):
             cmhub["base_url"] = normalize_cmhub_base_url(cmhub.get("base_url", ""))
+            cmhub["download_with_curl"] = _normalize_cmhub_download_with_curl(
+                cmhub.get("download_with_curl", "auto")
+            )
     return config
 
 
@@ -386,6 +390,15 @@ def _clamp_int(value, minimum, maximum, default):
     return min(int(maximum), max(int(minimum), number))
 
 
+def _normalize_cmhub_download_with_curl(value):
+    if isinstance(value, bool):
+        return "true" if value else "false"
+    text = str(value or "auto").strip().lower()
+    if text in {"auto", "true", "false"}:
+        return text
+    return "auto"
+
+
 def _assert_no_secrets(config):
     def visit(value, path):
         if isinstance(value, dict):
@@ -621,6 +634,9 @@ def cmhub_config(config=None) -> dict:
     merged["title_alias"] = str(merged.get("title_alias", "") or "").strip()
     merged["image_alias"] = str(merged.get("image_alias", "") or "").strip()
     merged["connect_timeout"] = int(merged.get("connect_timeout", 10) or 10)
+    merged["download_with_curl"] = _normalize_cmhub_download_with_curl(
+        merged.get("download_with_curl", "auto")
+    )
     merged["check_balance_before_batch"] = bool(merged.get("check_balance_before_batch", False))
     if merged["connect_timeout"] <= 0:
         raise ConfigError("ai.cmhub.connect_timeout 必须大于 0")