fix: resolve Axum 0.8 panic by removing root nesting and using fallback_service

src/dashboard/mod.rs

@@ -55,7 +55,6 @@ pub fn router(state: AppState) -> Router {
     
     Router::new()
         // Static file serving
-        .nest_service("/", tower_http::services::ServeDir::new("static"))
         .fallback_service(tower_http::services::ServeDir::new("static"))
         
         // WebSocket endpoint

src/main.rs

@@ -118,7 +118,6 @@ async fn main() -> Result<()> {
     // Create application router
     let app = Router::new()
         .route("/health", get(health_check))
-        .route("/", get(root))
         .merge(server::router(state.clone()))
         .merge(dashboard::router(state.clone()));
 
@@ -135,7 +134,3 @@ async fn main() -> Result<()> {
 async fn health_check() -> &'static str {
     "OK"
 }
-
-async fn root() -> &'static str {
-    "LLM Proxy Gateway - Unified interface for OpenAI, Gemini, DeepSeek, and Grok"
-}