feat(suite): confirm AI writing cost before request

app/gui/workers.py

@@ -12,7 +12,15 @@ try:
 except ModuleNotFoundError:  # pragma: no cover - GUI import guard
     Signal = None
 
-from .. import ai, image_studio, image_studio_export, image_studio_generation, image_studio_images
+from .. import (
+    ai,
+    appconfig,
+    cmhub_models,
+    image_studio,
+    image_studio_export,
+    image_studio_generation,
+    image_studio_images,
+)
 from ..collect_skip import ALIAS_UNMATCHED, LOGIN_REQUIRED, empty_skip_reason_counts
 from .widgets import *
 
@@ -484,6 +492,38 @@ class ProductSuiteAiWriteWorker(BaseWorker):
         }
 
 
+class CMHubModelCatalogWorker(BaseWorker):
+    """Fetch a transient cmhub model catalog without blocking a product workflow."""
+
+    def __init__(
+        self,
+        base_url,
+        api_key,
+        *,
+        connect_timeout=10,
+        use_system_proxy=False,
+    ):
+        super().__init__()
+        self.base_url = appconfig.normalize_cmhub_base_url(base_url)
+        self.api_key = str(api_key or "")
+        self.connect_timeout = max(1, int(connect_timeout or 10))
+        self.use_system_proxy = bool(use_system_proxy)
+
+    def execute(self):
+        if self.should_cancel():
+            return {"cancelled": True}
+        models = ai.fetch_cmhub_models(
+            self.base_url,
+            self.api_key,
+            connect_timeout=self.connect_timeout,
+            use_system_proxy=self.use_system_proxy,
+        )
+        if self.should_cancel():
+            return {"cancelled": True}
+        cmhub_models.cache_model_catalog(self.base_url, models)
+        return {"models": models}
+
+
 class ProductSuiteImportImagesWorker(BaseWorker):
     """Validate and copy local product images outside the GUI thread."""
 
@@ -2869,6 +2909,7 @@ class CMHubSettingsWorker(BaseWorker):
                 self.api_key,
                 connect_timeout=self.connect_timeout,
             )
+            cmhub_models.cache_model_catalog(self.base_url, models)
             balance = None
             if self.include_balance:
                 balance = ai.fetch_cmhub_balance(