feat: expose needs_auth for plugin/read. (#15217)

So UI can render it properly.

codex-rs/app-server-protocol/src/protocol/v2.rs

@@ -2035,6 +2035,7 @@ pub struct AppSummary {
     pub name: String,
     pub description: Option<String>,
     pub install_url: Option<String>,
+    pub needs_auth: bool,
 }
 
 impl From<AppInfo> for AppSummary {
@@ -2044,6 +2045,7 @@ impl From<AppInfo> for AppSummary {
             name: value.name,
             description: value.description,
             install_url: value.install_url,
+            needs_auth: false,
         }
     }
 }