feat(tui): add usage overlay and sidebar for displaying usage statistics and tasks

feat(tui): implement status bar with connection and turn state indicators
feat(tui): create workflow panel for agent status and progress visualization
feat(web): introduce web frontend interface with static file serving
feat(ws): add WebSocket interface for real-time communication and session management

apps/application/src/ports/authentication.rs

@@ -0,0 +1,35 @@
+//! AuthService port — combined authentication operations.
+//!
+//! Defines a high-level authentication trait that composes password
+//! verification and token generation into a single use-case boundary.
+//! Implementations delegate to the injected `PasswordService` and
+//! `TokenService` adapters.
+
+use anyhow::Result;
+use std::future::Future;
+
+/// High-level authentication service combining password verification
+/// and token issuance (login flow).
+///
+/// # Flow
+///
+/// 1. **`authenticate`** — verify a subject's password against a stored hash.
+/// 2. **`issue_tokens`** — generate an access + refresh token pair for a subject.
+///
+/// Implementations are generic over `PasswordService` and `TokenService`
+/// port traits.
+pub trait AuthService: Send + Sync {
+    /// Authenticate a user by verifying a password against a stored hash.
+    ///
+    /// Returns `true` if the password matches, `false` otherwise.
+    fn authenticate(
+        &self,
+        password: &str,
+        hash: &str,
+    ) -> impl Future<Output = Result<bool>> + Send;
+
+    /// Issue a new access + refresh token pair for the given subject.
+    ///
+    /// Returns `(access_token, refresh_token)`.
+    fn issue_tokens(&self, sub: &str) -> Result<(String, String)>;
+}