fix: revert default to verbose mode (true) and force-show on Error status

Per maintainer review (tanzhenxin): default verboseMode reverted to true
to preserve existing behavior — compact mode is opt-in via Ctrl+O.

Also addresses wenshao's security concern: in compact mode, tool groups
now force-expand on Error status (in addition to existing Confirming
handling), and ToolMessage force-shows result for both Confirming and
Error statuses so users always see diffs before approval and error
details for debugging.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/cli/src/config/settingsSchema.ts

@@ -545,7 +545,7 @@ const SETTINGS_SCHEMA = {
         label: 'Verbose Mode',
         category: 'UI',
         requiresRestart: false,
-        default: false,
+        default: true,
         description:
           'Show full tool output and thinking in verbose mode (toggle with Ctrl+O).',
         showInDialog: false,