Miscellaneous fixes (0.17 beta) (#21737)

* use default stable api version for gemini genai client

* update gemini docs

* remove outdated genai.md and update correct file

* Classification fixes

* Mutate when a date is selected and marked as reviewed

---------

Co-authored-by: Nicolas Mowen <nickmowen213@gmail.com>

frigate/api/classification.py

@@ -759,15 +759,28 @@ def delete_classification_dataset_images(
         CLIPS_DIR, sanitize_filename(name), "dataset", sanitize_filename(category)
     )
 
+    deleted_count = 0
     for id in list_of_ids:
         file_path = os.path.join(folder, sanitize_filename(id))
 
         if os.path.isfile(file_path):
             os.unlink(file_path)
+            deleted_count += 1
 
     if os.path.exists(folder) and not os.listdir(folder) and category.lower() != "none":
         os.rmdir(folder)
 
+    # Update training metadata to reflect deleted images
+    # This ensures the dataset is marked as changed after deletion
+    # (even if the total count happens to be the same after adding and deleting)
+    if deleted_count > 0:
+        sanitized_name = sanitize_filename(name)
+        metadata = read_training_metadata(sanitized_name)
+        if metadata:
+            last_count = metadata.get("last_training_image_count", 0)
+            updated_count = max(0, last_count - deleted_count)
+            write_training_metadata(sanitized_name, updated_count)
+
     return JSONResponse(
         content=({"success": True, "message": "Successfully deleted images."}),
         status_code=200,