feat: add IPTV export functionality with M3U and XMLTV generation, including UI components for export dialog

k-tv-backend/api/src/config.rs

@@ -39,6 +39,9 @@ pub struct Config {
     pub jellyfin_base_url: Option<String>,
     pub jellyfin_api_key: Option<String>,
     pub jellyfin_user_id: Option<String>,
+
+    /// Public base URL of this API server (used to build IPTV stream URLs).
+    pub base_url: String,
 }
 
 impl Config {
@@ -111,6 +114,9 @@ impl Config {
         let jellyfin_api_key = env::var("JELLYFIN_API_KEY").ok();
         let jellyfin_user_id = env::var("JELLYFIN_USER_ID").ok();
 
+        let base_url = env::var("BASE_URL")
+            .unwrap_or_else(|_| format!("http://localhost:{}", port));
+
         Self {
             host,
             port,
@@ -134,6 +140,7 @@ impl Config {
             jellyfin_base_url,
             jellyfin_api_key,
             jellyfin_user_id,
+            base_url,
         }
     }
 }