fix

src/config.rs

@@ -1,5 +1,5 @@
 use config::{Config, ConfigError, Environment, File};
-use serde::Deserialize;
+use serde::{Deserialize, Deserializer};
 use std::path::PathBuf;
 
 #[derive(Debug, Clone, Deserialize)]
@@ -32,6 +32,7 @@ pub struct Settings {
     pub card_master_url: String,
     
     // File paths
+    #[serde(deserialize_with = "deserialize_pathbuf")]
     pub config_dir: PathBuf,
 }
 
@@ -74,7 +75,7 @@ impl Settings {
             .set_default("card_master_url", "https://git.syui.ai/ai/ai/raw/branch/main/ai.json")?;
 
         // Load from config file if it exists
-        let config_file = config_dir.join("config.toml");
+        let config_file = config_dir.join("config.json");
         if config_file.exists() {
             builder = builder.add_source(File::from(config_file));
         }
@@ -125,3 +126,11 @@ impl GachaConfig {
         ]
     }
 }
+
+fn deserialize_pathbuf<'de, D>(deserializer: D) -> Result<PathBuf, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    let s = String::deserialize(deserializer)?;
+    Ok(PathBuf::from(s))
+}