refactor(i18n): U36 全量 JSX 属性 + toast 硬编码中文清零 — 20 文件 30 处 → 0

清理 23 处 JSX 属性 (title/placeholder/label/description) + 7 处 toast 调用硬编码中文:
- Deploy 模块 (AppRelease/DeployCredentials/PipelineManager/WorkspaceTermDialog/CredFormDialog/JobRoleCreateDialog/PipelineCreateDialog/AdvancedSettingsPanel)
- Server 模块 (ServerForm)
- System 模块 (LdapManagementSection/LiveMonitorDialog/SystemManager)
- Audit 模块 (ActiveSessionsPanel/HistorySessionsPanel)
- Monitor 模块 (AlertRulesTab/PrometheusDatasourceManager/SNMPMonitor)
- AIOps 模块 (PredictiveCapacityTab)
- Common/UI (TerminalLoadingOverlay/copy-button)

新增 25 翻译键 (common.connectingEllipsis/enteringWorkspace/connectingMonitor + deploy.* 11键 + server.jsonFormatPlaceholder + system.* 3键 + audit.* 2键 + monitor.* 3键 + aiops.aiAnalysisFailedToast + pipeline.subtitle)
copy-button.tsx 从 import i18n → useTranslation() hook
3 组件新增 useTranslation hook (TerminalLoadingOverlay/WorkspaceTermDialog/LiveMonitorDialog/PredictiveCapacityTab)

zh/en 7616→7640 +24 对齐, tsc -b=0, npm build✓ (17.25s), ESLint=0/43/0, go build=0, 17/17 测试通过

frontend/src/components/deploy/credential-manager/CredFormDialog.tsx

@@ -123,8 +123,8 @@ export function CredFormDialog({ open, onClose, onSaved, editData }: CredFormDia
         if (sshPrivateKey.trim()) payload.ssh_private_key = sshPrivateKey.trim();
         if (sshPublicKey.trim()) payload.ssh_public_key = sshPublicKey.trim();
       } else if (secretType === 'rdp') {
-        if (!rdpUsername.trim()) { toast.error('请填写 RDP 用户'); return; }
-        if (!isEdit && !rdpPassword.trim()) { toast.error('请填写 RDP 密码'); return; }
+        if (!rdpUsername.trim()) { toast.error(t('deploy.rdpUserRequired')); return; }
+        if (!isEdit && !rdpPassword.trim()) { toast.error(t('deploy.rdpPasswordRequired')); return; }
         if (rdpUsername.trim()) payload.rdp_username = rdpUsername.trim();
         if (rdpPassword.trim()) payload.rdp_password = rdpPassword.trim();
         if (rdpDomain.trim()) payload.rdp_domain = rdpDomain.trim();
@@ -310,11 +310,11 @@ export function CredFormDialog({ open, onClose, onSaved, editData }: CredFormDia
                   </Select>
                 </div>
                 {/* 用户名(左上)与密码(左下)同列上下行，安全模式/域归右列 // Logan.Li */}
-                <div><FieldWithToggle label="Windows 密码" value={rdpPassword} onChange={setRdpPassword}
-                  placeholder="Windows 登录密码" fieldKey="rdp_pwd" required /></div>
+                <div><FieldWithToggle label={t('deploy.rdpPassword')} value={rdpPassword} onChange={setRdpPassword}
+                  placeholder={t('deploy.rdpPasswordPlaceholder')} fieldKey="rdp_pwd" required /></div>
                 <div className="space-y-1">
                   <Label className="text-[var(--dg-text-secondary)] text-xs">域</Label>
-                  <Input value={rdpDomain} onChange={e => setRdpDomain(e.target.value)} placeholder="可选"
+                  <Input value={rdpDomain} onChange={e => setRdpDomain(e.target.value)} placeholder={t('common.optional')}
                     className="bg-[var(--dg-bg-tertiary)] border-[var(--dg-border)] text-[var(--dg-text-primary)]" />
                 </div>
               </div>