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/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "zesdex-application"
+version.workspace = true
+edition.workspace = true
+authors.workspace = true
+
+# Application layer — port traits (interfaces), use cases, DTOs.
+# Depends ONLY on domain. Application services orchestrate domain objects
+# through port traits without knowing concrete implementations.
+[dependencies]
+zesdex-domain = { path = "../domain" }
+serde.workspace = true
+serde_json.workspace = true
+chrono.workspace = true
+uuid.workspace = true
+anyhow.workspace = true
+tracing.workspace = true
+tokio.workspace = true
+base64.workspace = true
+sha2.workspace = true
+url.workspace = true