show live per-member status in the team sidebar

The teammate status was emitted by each TranscriptPublisher's statusStream
but never reached the bus. The observer now forwards it onto a shared
member-status channel ({agentId, model, permissionMode, contextTokens});
the meta sidebar subscribes and folds each member's live permission-mode
and context-token count into its roster row. No re-tailing — reuses the
existing stream (D-75).

T-157.

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

test/builtin/claude/claude_meta_sidebar_test.dart

@@ -1,5 +1,7 @@
 import 'package:clide/builtin/claude/src/claude_meta_sidebar.dart';
 import 'package:clide/builtin/claude/src/claude_stats.dart';
+import 'package:clide/builtin/claude/src/transcript_publisher.dart';
+import 'package:clide/builtin/claude/src/transcript_reader.dart';
 import 'package:clide/kernel/kernel.dart';
 import 'package:flutter_test/flutter_test.dart';
 
@@ -58,6 +60,35 @@ void main() {
     expect(find.text('No team active.'), findsOneWidget);
   });
 
+  testWidgets('folds live per-member status (mode + context) into the roster row', (tester) async {
+    await tester.pumpWidget(harness(f, sidebar()));
+    await tester.pumpAndSettle();
+
+    f.services.events.emit(const TeamMemberJoined(
+      team: 't',
+      agentId: 'a1',
+      name: 'Scout',
+      agentType: 'explorer',
+      paneId: '%1',
+      color: 'blue',
+    ));
+    await tester.pump();
+    await tester.pump();
+
+    f.services.messages.publish(
+      ClaudeConversation.publisher,
+      ClaudeConversation.memberStatusChannel,
+      ClaudeConversation.memberStatusData(
+        'a1',
+        const SessionStatus(model: 'claude-opus-4-7', permissionMode: 'acceptEdits', contextTokens: 21000),
+      ),
+    );
+    await tester.pump();
+    await tester.pump();
+
+    expect(find.text('explorer  ·  opus 4.7  ·  accept-edits  ·  21k ctx'), findsOneWidget);
+  });
+
   testWidgets('degrades to a no-activity message with empty stats', (tester) async {
     await tester.pumpWidget(harness(f, sidebar()));
     await tester.pumpAndSettle();

test/builtin/claude/transcript_publisher_test.dart

@@ -79,5 +79,20 @@ void main() {
     test('teammateChannel namespaces by agentId', () {
       expect(ClaudeConversation.teammateChannel('coder@team-x'), 'conversation/coder@team-x');
     });
+
+    test('memberStatusData encodes agentId + present status fields (T-157)', () {
+      final full = ClaudeConversation.memberStatusData(
+        'coder@team-x',
+        const SessionStatus(model: 'claude-opus-4-7', permissionMode: 'plan', contextTokens: 21000),
+      );
+      expect(full, {
+        'agentId': 'coder@team-x',
+        'model': 'claude-opus-4-7',
+        'permissionMode': 'plan',
+        'contextTokens': 21000,
+      });
+      // Absent fields are omitted (only agentId is always present).
+      expect(ClaudeConversation.memberStatusData('a', const SessionStatus()), {'agentId': 'a'});
+    });
   });
 }