test(claude): cover the per-repo account branches to clear the 95% gate

Adds the missing-line coverage the epic's new code left uncovered: Account /
DetectedAccount value equality, the set/unset no-workspace error branches, the
login dialog's escape-to-close, and the settings controls' live-update /
no-workspace / duplicate-add / re-login paths.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

test/daemon/claude_account_commands_test.dart

@@ -140,6 +140,16 @@ void main() {
     expect(published.single.data, {'action': 'login', 'name': 'work', 'dir': '/home/u/.claude-work'});
   });
 
+  test('set/unset with no workspace open error clearly', () async {
+    wire(cwd: null);
+    final set = await run(['set', 'work']);
+    expect(set.ok, isFalse);
+    expect(set.error?.message, contains('no workspace'));
+    final unset = await run(['unset']);
+    expect(unset.ok, isFalse);
+    expect(unset.error?.message, contains('no workspace'));
+  });
+
   test('unknown action → userError listing the verbs', () async {
     wire();
     final r = await run(['frobnicate']);