feat(shell): collapsible sidebar, account menu, and phone drawer

The Dashboard's shell now follows DESIGN.md §4 (ADR 0058):

- A collapsible left sidebar replaces the header-and-column layout. It
  is icons and labels when expanded and icons only when collapsed; each
  collapsed item keeps its name, visually hidden, and shows a tooltip
  on hover and on keyboard focus (WCAG 2.2 §1.4.13). The Overview comes
  first, then the server's groups and modules. There is no top bar.
- The expanded/collapsed choice is remembered in this browser's
  localStorage, behind a SidebarPreference interface that a synced
  store can replace later.
- An account menu at the bottom of the sidebar follows the WAI-ARIA menu
  button pattern and offers only Sign out, which now lives there rather
  than in the header.
- On phones (below 48em) the same navigation opens in a modal drawer:
  the page behind it is inert and focus is trapped inside it. Escape,
  its close button, and the backdrop close it and return focus to the
  menu button. Choosing a page closes it and focuses the page. Changing
  layout keeps the route, the desktop mode, and the mounted module.
- Lucide (lucide-react 1.48.0, shell only) is Ekklesia's icon
  vocabulary. Every module shows one generic icon until manifest v9
  lets modules declare their own; there is no per-module icon map.
- The identity slot is a neutral placeholder with no inputs, waiting
  for branding (#101).

The tooltip, menu, and drawer stay shell-local until a second consumer
needs them (ADR 0039). The deploy smoke now signs out through the
account menu, and drives the drawer at phone size in a real browser.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

pnpm-lock.yaml

@@ -407,6 +407,9 @@ importers:
       '@ekklesia/ui':
         specifier: workspace:*
         version: link:../../packages/ui
+      lucide-react:
+        specifier: 1.48.0
+        version: 1.48.0([email protected])
       react:
         specifier: 19.2.8
         version: 19.2.8
@@ -2401,6 +2404,11 @@ packages:
   [email protected]:
     resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==}
 
+  [email protected]:
+    resolution: {integrity: sha512-R0CIKY/fXiC6y9xRBADgsK+VW2p/pcTJOMhLZf1T+uG+vJUvyUR02nGOgmIIC7MPkiNK4Ox8QDnbqF8rJYWPZQ==}
+    peerDependencies:
+      react: ^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0
+
   [email protected]:
     resolution: {integrity: sha512-vd2F4YUyEXKGcLHoq+TEyCjxueSeHnFxyyjNp80yg0XV4vUhnDer/lvvlqM/arB5bXQN5K2/3oinyCRyx8T2CQ==}
 
@@ -4369,6 +4377,10 @@ snapshots:
     dependencies:
       yallist: 3.1.1
 
+  [email protected]([email protected]):
+    dependencies:
+      react: 19.2.8
+
   [email protected]:
     dependencies:
       '@jridgewell/sourcemap-codec': 1.5.5