Desktop/remove hard requirement auth wall on desktop (#5956)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src-tauri/src/commands/backend.rs

@@ -398,6 +398,9 @@ pub async fn start_backend(
         ConnectionMode::SelfHosted => {
             add_log("🌐 Running in Self-Hosted mode - starting local backend (for hybrid execution support)".to_string());
         }
+        ConnectionMode::Local => {
+            add_log("💻 Running in Local-only mode - starting local backend".to_string());
+        }
     }
 
     // Check if backend is already running or starting

frontend/src-tauri/src/state/connection_state.rs

@@ -6,6 +6,7 @@ use std::sync::Mutex;
 pub enum ConnectionMode {
     SaaS,
     SelfHosted,
+    Local,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]