feat: finish the homepage plugin, move service links and canvas out of core (B19)

src/ui/shell/shell-layout.ts

@@ -18,20 +18,10 @@ import { getTabType } from "./tab-registry";
  * purpose: the shell always keeps one alive as the fallback tab, so it is
  * not a meaningful part of an arrangement.
  */
-const CORE_CAPTURABLE = new Set([
-  "homepage",
-  "termix-id",
-  "macros",
-  "ssh-tools",
-]);
+const CORE_CAPTURABLE = new Set(["termix-id", "macros", "ssh-tools"]);
 
 /** Core types reopened as singletons, with an optional preselected host. */
-const CORE_SINGLETON = new Set([
-  "homepage",
-  "termix-id",
-  "macros",
-  "ssh-tools",
-]);
+const CORE_SINGLETON = new Set(["termix-id", "macros", "ssh-tools"]);
 
 /** Core tab types that are never part of a saved arrangement. */
 const CORE_UNSAVED = new Set([