feat(core): detail drawer + address book list redesign

Introduces a reusable core detail-drawer primitive that slides in from the
right and loads any view via a `*-fragment(none).phtml` endpoint. Bundles the
address book list overhaul that is its first consumer.

Core additions:
- `app-detail-drawer.js` — generic drawer with stepper, focus trap, body
  scroll-lock, URL-hash deep-linking, session-expiry detection
- `app-fragment-init.js` — auto-wires tabs/lookups/confirm/file-upload/
  fslightbox inside injected HTML; consumers do not re-initialize components
- `app-focus-trap.js` — shared focus-trap + refcounted scroll-lock, used by
  both filter-drawer and detail-drawer
- `getHtml()` in `app-http.js` + `SessionExpiredError`; drawer reloads the
  page on auth redirect instead of rendering the login form in the panel
- `DetailDrawerFragmentContractTest` enforces that every `initDetailDrawer`
  consumer ships matching `*-fragment($id).php` + `*-fragment(none).phtml`

Address book list:
- Grid collapses from 9 columns to 4 (identity / context / phone / actions)
  with a two-line identity cell (avatar + name + email)
- Tenant register tabs above the grid using the `app-list-tabs` partial;
  tenant filter wired via hidden toolbar field so grid.js forwards it on
  every data fetch
- Profile body extracted to a shared partial so the full-page view and the
  new drawer fragment share the same markup
- New i18n keys for the drawer/list labels

Also refactors `app-filter-drawer` to reuse the shared focus-trap and
scroll-lock instead of maintaining its own copy, and documents the
detail-drawer convention in CLAUDE.md.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

modules/addressbook/module.php

@@ -17,6 +17,7 @@ return [
         // Keep canonical route stable without forcing a /index target to avoid Router redirect loops.
         ['path' => 'address-book', 'target' => 'address-book'],
         ['path' => 'address-book/data', 'target' => 'address-book/data'],
+        ['path' => 'address-book/view-fragment', 'target' => 'address-book/view-fragment'],
         // Legacy aliases for existing bookmarks/links.
         ['path' => 'addressbook', 'target' => 'address-book'],
         ['path' => 'adressbook', 'target' => 'address-book'],
@@ -70,6 +71,9 @@ return [
             'modules/addressbook/css/pages/address-book-view.css',
             'modules/addressbook/css/pages/address-book-banner.css',
         ],
+        'address-book-index' => [
+            'modules/addressbook/css/pages/address-book-index.css',
+        ],
     ],
     'scheduler_jobs' => [],