fix(i18n): replace raw translation keys on panel screens (#7057)

Use valid translation keys on six panel screens, add the missing copy-failure and empty-value strings across all locales, and reject unresolved literal translation keys in the regression test.

frontend/src/pages/clients/ClientBulkAdjustModal.tsx

@@ -95,7 +95,7 @@ export default function ClientBulkAdjustModal({
       <Modal
         open={open}
         title={t('pages.clients.bulkAdjustTitle', { count })}
-        okText={t('apply')}
+        okText={t('confirm')}
         cancelText={t('cancel')}
         confirmLoading={submitting}
         onOk={handleOk}

frontend/src/pages/clients/FilterDrawer.tsx

@@ -128,7 +128,7 @@ export default function FilterDrawer({
           />
         </Form.Item>
 
-        <Form.Item label={t('inbounds')} htmlFor={`${uid}-inbounds`}>
+        <Form.Item label={t('pages.clients.attachedInbounds')} htmlFor={`${uid}-inbounds`}>
           <Select
             id={`${uid}-inbounds`}
             mode="multiple"
@@ -136,7 +136,7 @@ export default function FilterDrawer({
             value={filters.inboundIds}
             onChange={(v) => patch('inboundIds', v as number[])}
             options={inboundOptions}
-            placeholder={t('inbounds')}
+            placeholder={t('pages.clients.attachedInbounds')}
             allowClear
             showSearch={{ optionFilterProp: 'label' }}
             listHeight={220}

frontend/src/pages/inbounds/form/protocols/tuic.tsx

@@ -69,7 +69,7 @@ export default function TuicFields() {
       if (obj.webKeyFile) {
         setValue('settings.server.private_key', obj.webKeyFile);
       }
-      messageApi.success(t('pages.inbounds.setSuccess'));
+      messageApi.success(t('success'));
     } catch {
       messageApi.error(t('somethingWentWrong'));
     } finally {

frontend/src/pages/settings/SecurityTab.tsx

@@ -169,7 +169,7 @@ export default function SecurityTab({ allSetting, updateSetting, saveSetting }:
     if (!token) return;
     const ok = await ClipboardManager.copyText(token);
     if (ok) messageApi.success(t('copySuccess'));
-    else messageApi.error(t('copyFail') ?? 'Copy failed');
+    else messageApi.error(t('copyFail'));
   }
 
   function openCreateModal() {

frontend/src/pages/xray/overrides/WarpModal.tsx

@@ -291,7 +291,7 @@ export default function WarpModal({
         interval: methods.getValues('updateInterval'),
       });
       if (msg?.success) {
-        messageApi.success(t('pages.setting.toasts.saveSuccess', 'Settings saved successfully'));
+        messageApi.success(t('pages.settings.toasts.modifySettings'));
       }
     } finally {
       setLoading(false);

frontend/src/test/i18n-dead-keys.test.ts

@@ -82,14 +82,15 @@ describe('i18n keys', () => {
     );
   });
 
-  it('no literal t() key resolves to an object', () => {
-    const objectKeys = Array.from(
-      blob.matchAll(/\bt\(\s*(['"`])([\w.-]+)\1\s*[,)]/g),
-      (m) => m[2],
-    ).filter((key) => enKeys.some((leaf) => leaf.startsWith(`${key}.`)));
+  it('every literal t() key is an en-US string', () => {
+    const leaves = new Set(enKeys);
+    const literalKeys = new Set(
+      Array.from(blob.matchAll(/\bt\(\s*(['"`])([\w.-]+)\1\s*[,)]/g), (m) => m[2]),
+    );
+    const unresolved = [...literalKeys].filter((key) => !leaves.has(key));
     expect(
-      objectKeys,
-      `t() keys naming a group, rendered as "key '…' returned an object instead of string.":\n  ${objectKeys.join('\n  ')}`,
+      unresolved,
+      `t() keys that are not an en-US string (a missing key renders raw, a group renders "key '…' returned an object instead of string."):\n  ${unresolved.join('\n  ')}`,
     ).toEqual([]);
   });