fix: default dangerouslySkipPermissions to true for unattended agents

Agents run unattended and cannot respond to interactive permission
prompts from Claude Code. When dangerouslySkipPermissions is false
(the previous default), Claude Code blocks file operations with
"Claude requested permissions to write to /path, but you haven't
granted it yet" — making agents unable to edit files.

The OnboardingWizard already sets this to true for claude_local
agents (OnboardingWizard.tsx:277), but agents created or edited
outside the wizard inherit the default of false, breaking them.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ui/src/components/agent-config-defaults.ts

@@ -8,7 +8,7 @@ export const defaultCreateValues: CreateConfigValues = {
   model: "",
   thinkingEffort: "",
   chrome: false,
-  dangerouslySkipPermissions: false,
+  dangerouslySkipPermissions: true,
   search: false,
   dangerouslyBypassSandbox: false,
   command: "",