feat(address-book): add a toolbar button to open the web console (#16680)

The web console is only reachable from the "More on web console" item
in the menu beside the Tags heading, which is easy to miss and hidden
when the tags panel is turned off.

Add a button to the Address Book toolbar that opens the same URL and
reuses the same tooltip text. It shows under the same conditions as the
menu item: logged in, not in legacy address book mode, and write access
to the current book.

Signed-off-by: Cody Swartz <ctsstc@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

flutter/lib/common/widgets/peer_tab_page.dart

@@ -21,6 +21,7 @@ import 'package:flutter_svg/flutter_svg.dart';
 import 'package:get/get.dart';
 import 'package:provider/provider.dart';
 import 'package:pull_down_button/pull_down_button.dart';
+import 'package:url_launcher/url_launcher_string.dart';
 
 import '../../common.dart';
 import '../../models/platform_model.dart';
@@ -549,6 +550,28 @@ class _PeerTabPageState extends State<PeerTabPage>
         });
   }
 
+  Widget _openWebConsole() {
+    return _hoverAction(
+        context: context,
+        toolTip: translate('ab_web_console_tip'),
+        child: Icon(
+          Icons.open_in_new,
+          size: 18,
+        ),
+        onTap: () async {
+          final url = await bind.mainGetApiServer();
+          if (await canLaunchUrlString(url)) {
+            launchUrlString(url);
+          }
+        });
+  }
+
+  bool _showWebConsole(PeerTabModel model) =>
+      model.currentTab == PeerTabIndex.ab.index &&
+      gFFI.userModel.isLogin &&
+      !gFFI.abModel.legacyMode.value &&
+      gFFI.abModel.current.canWrite();
+
   List<Widget> _landscapeRightActions(BuildContext context) {
     final model = Provider.of<PeerTabModel>(context);
     return [
@@ -566,6 +589,10 @@ class _PeerTabPageState extends State<PeerTabPage>
         offstage: model.currentTab == PeerTabIndex.recent.index,
         child: PeerSortDropdown(),
       ),
+      Offstage(
+        offstage: !_showWebConsole(model),
+        child: _openWebConsole(),
+      ),
       Offstage(
         offstage: model.currentTab != PeerTabIndex.ab.index,
         child: _toggleTags(),
@@ -630,6 +657,7 @@ class _PeerTabPageState extends State<PeerTabPage>
     final List<Widget> dynamicActions = [
       if (model.currentTabCachedPeers.isNotEmpty) _createMultiSelection(),
       if (model.currentTab != PeerTabIndex.recent.index) PeerSortDropdown(),
+      if (_showWebConsole(model)) _openWebConsole(),
       if (model.currentTab == PeerTabIndex.ab.index) _toggleTags()
     ];
     final rightWidth = availableWidth -