fix: livrable tickets #70 #100 #102 — UX surface scoping

- #70: implémentation suppression modèles locaux téléchargés
- #100: correction scroll OpenCode
- #102: correction fit TUI après switch/layout
- memory note scoping UX

crates/app-tauri/tests/dto_model_servers.rs

@@ -132,6 +132,7 @@ fn model_server_dto_preserves_existing_internal_model_id_on_upsert() {
         auto_start: true,
         stop_policy: StopPolicyDto::StopOnAppExit,
         warmup_deadline_secs: Some(900),
+        artifact: Default::default(),
     };
 
     let config = dto.into_domain(Some(&existing)).unwrap();