feat(sys-menu): replace sys_menu with new e_app_sys_bar component

New compact bar + expandable panel design:
- Compact strip (bottom-right): auth shield, font cycler, dark/light toggle,
  edit mode toggle (authenticated+), menu expand — icon-only by default,
  labels reveal on hover
- Hover info strip shows person name + access level when logged in
- Expanded panel: sign in/out, access/passcode, appearance (theme), admin
  (config + URL builder + debug trigger) — all gated same as before
- Debug overlay trigger moved into admin section (edit mode only)
- All business logic preserved via existing sub-components (unchanged)
- e_app_sys_menu.svelte retained but no longer mounted (import commented out)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/+layout.svelte

@@ -42,7 +42,8 @@
 
     // import MyClipboard from '$lib/app_components/e_app_clipboard.svelte';
     import E_app_debug_menu from '$lib/app_components/e_app_debug_menu.svelte';
-    import E_app_sys_menu from '$lib/app_components/e_app_sys_menu.svelte';
+    import E_app_sys_bar from '$lib/app_components/e_app_sys_bar.svelte';
+    // import E_app_sys_menu from '$lib/app_components/e_app_sys_menu.svelte'; // replaced by E_app_sys_bar
 
     interface Props {
         data: any;
@@ -329,7 +330,7 @@
 {#if browser && (!$ae_loc?.iframe || $ae_loc?.trusted_access)}
     <!-- print:hidden wrapper: sys/debug menus are fixed overlays — must not appear on printed pages -->
     <div class="print:hidden">
-        <E_app_sys_menu {data} bind:hide={$ae_loc.sys_menu.hide} bind:expand={$ae_sess.sys_menu.expand} />
+        <E_app_sys_bar {data} bind:hide={$ae_loc.sys_menu.hide} bind:expand={$ae_sess.sys_menu.expand} />
 
         <!-- You must be in Edit Mode to initially see the Debug expand button. Once expanded, you can toggle the Edit Mode while still seeing the expanded Debug content. -->
         {#if $ae_loc.edit_mode || $ae_loc.debug_menu.expand}