feat: Make 'server' feature optional and add compile-time check

Co-authored-by: aider (openai/andrew/openrouter/sonoma-sky-alpha) <aider@aider.chat>

src/main.rs

@@ -1,4 +1,3 @@
-
 use anyhow::{Context, Error, Result, anyhow};
 use clap::*;
 use clap::error::ErrorKind;
@@ -203,7 +202,19 @@ fn main() -> Result<(), Error> {
         KeepModes::Info => modes::info::mode_info(&mut cmd, &settings, ids, tags, &mut conn, data_path),
         KeepModes::Status => modes::status::mode_status(&mut cmd, &settings, data_path, db_path),
         KeepModes::StatusPlugins => modes::status_plugins::mode_status_plugins(&mut cmd, &settings, data_path, db_path),
-        KeepModes::Server => modes::server::mode_server(&mut cmd, &settings, &mut conn, data_path),
+        KeepModes::Server => {
+            #[cfg(feature = "server")]
+            {
+                modes::server::mode_server(&mut cmd, &settings, &mut conn, data_path)
+            }
+            #[cfg(not(feature = "server"))]
+            {
+                cmd.error(
+                    ErrorKind::MissingRequiredArgument,
+                    "This binary was not compiled with server support. Recompile with --features server"
+                ).exit();
+            }
+        },
         KeepModes::GenerateConfig => modes::generate_config::mode_generate_config(&mut cmd, &settings),
         KeepModes::Unknown => unreachable!(),
     }