fix(dashboard): guard clipboard copy in non-secure contexts

Address review feedback from gemini-code-assist on SecretsTab.tsx: guard the
copy button on navigator.clipboard so it is disabled and a no-op when the API
is unavailable (plain-HTTP contexts), instead of throwing a TypeError.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Myasnikov Daniil <myasnikovdaniil2001@gmail.com>

packages/system/dashboard/images/console/apps/console/src/routes/detail/SecretsTab.tsx

@@ -96,8 +96,8 @@ function SecretRow({
         </button>
         <button
           type="button"
-          disabled={!revealed}
-          onClick={() => navigator.clipboard.writeText(fullValue)}
+          disabled={!revealed || !navigator.clipboard}
+          onClick={() => navigator.clipboard?.writeText(fullValue)}
           className="rounded p-1 text-slate-500 hover:bg-slate-100 disabled:opacity-30"
           title="Copy"
         >