fix(xray): show the Google Drive defaults in the XDRIVE tuning fields

xray-core 26.11.9 (#7340, #7352) gives the Google Drive backend its own
defaults for the knobs a config leaves empty: flushIntervalMs 10,
maxPollIntervalMs 200 and concurrency 64. The other services keep 20, 500
and 8.

The tuning placeholders stand for "what the core uses when this is empty",
so they now follow the selected service, and the transports page in all
four doc languages names the Google Drive values.

frontend/src/lib/xray/forms/transport/XDriveForm.tsx

@@ -30,6 +30,13 @@ const TUNING_FIELDS = [
   ['concurrency', 'concurrency', 8],
 ] as const;
 
+// xray-core 26.11.9 (#7340, #7352) gives the Google Drive backend its own defaults.
+const GOOGLE_DRIVE_TUNING_DEFAULTS: Partial<Record<string, number>> = {
+  flushIntervalMs: 10,
+  maxPollIntervalMs: 200,
+  concurrency: 64,
+};
+
 const GOOGLE_DRIVE_SECRETS = ['clientId', 'clientSecret', 'refreshToken'] as const;
 const S3_SECRETS = [
   ['accessKeyId', true],
@@ -192,9 +199,15 @@ export default function XDriveForm() {
           </FormField>
         </>
       )}
-      {TUNING_FIELDS.map(([key, label, placeholder]) => (
+      {TUNING_FIELDS.map(([key, label, coreDefault]) => (
         <FormField key={key} label={t(`pages.inbounds.form.xdrive.${label}`)} name={[...BASE, key]}>
-          <InputNumber min={0} placeholder={String(placeholder)} style={{ width: '100%' }} />
+          <InputNumber
+            min={0}
+            placeholder={String(
+              (service === 'google-drive' && GOOGLE_DRIVE_TUNING_DEFAULTS[key]) || coreDefault,
+            )}
+            style={{ width: '100%' }}
+          />
         </FormField>
       ))}
     </>