feat(frontend): add targetStrategy field to the outbound editor

Xray-core added a top-level targetStrategy to OutboundObject that
controls how the destination domain is resolved before dialing
(AsIs/UseIP*/ForceIP*, any protocol). The panel neither offered a
control for it nor preserved the key across the modal's JSON round
trip, so hand-written values were silently dropped on save.

The form now carries targetStrategy next to sendThrough as a select
of the 11 canonical values; the adapter normalizes wire values to
canonical case (the core matches case-insensitively) and omits the
key when unset. Freedom settings additionally read the new
settings-level targetStrategy with domainStrategy as fallback,
mirroring the core, while still emitting the legacy domainStrategy
key so configs keep working on older cores.

frontend/src/pages/xray/outbounds/OutboundFormModal.tsx

@@ -39,6 +39,7 @@ import {
   NETWORK_OPTIONS,
   PROTOCOL_OPTIONS,
   SERVER_PROTOCOLS,
+  TARGET_STRATEGY_OPTIONS,
 } from './outbound-form-constants';
 import {
   applyNetworkChange,
@@ -394,6 +395,14 @@ export default function OutboundFormModal({
                       <Input placeholder={t('pages.xray.outboundForm.localIpPlaceholder')} />
                     </Form.Item>
 
+                    <Form.Item
+                      label={t('pages.xray.outbound.targetStrategy')}
+                      name="targetStrategy"
+                      tooltip={t('pages.xray.outboundForm.targetStrategyHint')}
+                    >
+                      <Select allowClear placeholder="AsIs" options={TARGET_STRATEGY_OPTIONS} />
+                    </Form.Item>
+
                     {SERVER_PROTOCOLS.has(protocol) && <ServerTarget />}
                     {protocol === 'vmess' && <VmessFields />}
                     {protocol === 'vless' && <VlessFields />}