fix: allow comma-separated strings for list config fields in environment variables

src/config/mod.rs

@@ -8,6 +8,7 @@ use std::sync::Arc;
 pub struct ServerConfig {
     pub port: u16,
     pub host: String,
+    #[serde(deserialize_with = "deserialize_vec_or_string")]
     pub auth_tokens: Vec<String>,
 }
 
@@ -62,6 +63,7 @@ pub struct GrokConfig {
 pub struct OllamaConfig {
     pub base_url: String,
     pub enabled: bool,
+    #[serde(deserialize_with = "deserialize_vec_or_string")]
     pub models: Vec<String>,
 }
 
@@ -189,3 +191,44 @@ impl AppConfig {
                     .map_err(|_| anyhow::anyhow!("Environment variable {} not set for {}", env_var, provider))
             }
         }
+        
+        /// Helper function to deserialize a Vec<String> from either a sequence or a comma-separated string
+        fn deserialize_vec_or_string<'de, D>(deserializer: D) -> Result<Vec<String>, D::Error>
+        where
+            D: serde::Deserializer<'de>,
+        {
+            struct VecOrString;
+        
+            impl<'de> serde::de::Visitor<'de> for VecOrString {
+                type Value = Vec<String>;
+        
+                fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+                    formatter.write_str("a sequence or a comma-separated string")
+                }
+        
+                fn visit_str<E>(self, value: &str) -> Result<Self::Value, E>
+                where
+                    E: serde::de::Error,
+                {
+                    Ok(value
+                        .split(',')
+                        .map(|s| s.trim().to_string())
+                        .filter(|s| !s.is_empty())
+                        .collect())
+                }
+        
+                fn visit_seq<S>(self, mut seq: S) -> Result<Self::Value, S::Error>
+                where
+                    S: serde::de::SeqAccess<'de>,
+                {
+                    let mut vec = Vec::new();
+                    while let Some(element) = seq.next_element()? {
+                        vec.push(element);
+                    }
+                    Ok(vec)
+                }
+            }
+        
+            deserializer.deserialize_any(VecOrString)
+        }
+