fix config: handle stringified JSON in API requests

ConfigUpdate fields (scheduler, logging, backup, nfo, other) arrive as
strings from frontend. Parse JSON or ast.literal_eval before validation.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/server/api/config.py

@@ -47,8 +47,19 @@ async def update_config(
         from src.config.settings import settings as app_settings
 
         anime_dir_changed = False
-        if update.other and update.other.get("anime_directory"):
-            anime_dir = update.other.get("anime_directory")
+        other_data = update.other
+        if isinstance(other_data, str):
+            try:
+                import ast
+                other_data = ast.literal_eval(other_data)
+            except (ValueError, SyntaxError):
+                try:
+                    import json
+                    other_data = json.loads(other_data)
+                except (ValueError, json.JSONDecodeError):
+                    other_data = None
+        if other_data and other_data.get("anime_directory"):
+            anime_dir = other_data.get("anime_directory")
             if anime_dir and not app_settings.anime_directory:
                 app_settings.anime_directory = str(anime_dir)
                 anime_dir_changed = True