fix: resolve compilation errors in tests by fixing type mismatches and imports

Co-authored-by: aider (openai/andrew/openrouter/anthropic/claude-sonnet-4) <aider@aider.chat>

src/modes/server.rs

@@ -12,7 +12,7 @@ use tower_http::cors::CorsLayer;
 use tower::ServiceBuilder;
 use tower_http::trace::TraceLayer;
 
-mod common;
+pub mod common;
 mod api;
 mod pages;