feat(tui): implement agent turn engine for background processing and enhance input handling

apps/gateway/src/bin/migrate.rs

@@ -4,13 +4,14 @@
 //! schema for each one. Standalone CLI tool invoked as `cargo run --bin migrate`.
 
 use std::path::Path;
+use tracing;
 
 fn main() -> anyhow::Result<()> {
     let store = zesdex_domain::core::Store::new();
     let sessions_dir = store.base_dir.join("sessions");
 
     if !sessions_dir.exists() {
-        eprintln!("No sessions directory found, nothing to migrate");
+        tracing::info!("No sessions directory found, nothing to migrate");
         return Ok(());
     }
 
@@ -27,16 +28,16 @@ fn main() -> anyhow::Result<()> {
         match migrate_session_msglog(&path) {
             Ok(_) => {
                 migrated += 1;
-                eprintln!("Migrated session: {:?}", path.file_name());
+                tracing::info!("Migrated session: {:?}", path.file_name());
             }
             Err(e) => {
                 failed += 1;
-                eprintln!("Failed to migrate session {:?}: {e}", path.file_name());
+                tracing::error!("Failed to migrate session {:?}: {e}", path.file_name());
             }
         }
     }
 
-    eprintln!("Migration complete: {migrated} succeeded, {failed} failed");
+    tracing::info!("Migration complete: {migrated} succeeded, {failed} failed");
     if failed > 0 {
         anyhow::bail!("{failed} session(s) failed to migrate");
     }