fix(dashboard): surface JSON parse errors in TemplatePicker handleApply

The silent .catch(() => ({})) swallowed malformed server responses
and fabricated an empty data object, showing a fake 'already active'
UI state when the backend actually returned something unparseable.

Drop the inline .catch so res.json() failures propagate to the
existing outer try/catch, which surfaces a user-visible
'Failed to apply template' error via setError.

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

Author: yasinBursali

dream-server/extensions/services/dashboard/src/components/TemplatePicker.jsx

@@ -149,7 +149,7 @@ export function TemplatePreview({ template, onClose, onApplied }) {
         timeout: 120000,
       })
       if (!res.ok) throw new Error(`HTTP ${res.status}`)
-      const data = await res.json().catch(() => ({}))
+      const data = await res.json()
       if (data.enabled_count > 0) {
         setApplied(data.restart_required ? 'restart_required' : 'enabled')
       } else {