perf(frontend): lazy-load modals + split heavy vendor chunks (#4501)

* perf(frontend): lazy-load modals on inbounds / clients / index pages

Modals on the three list pages were imported statically, so the JS +
CSS for every form, info, qr, log, backup, metrics, system-history,
version, and config-text modal sat in the initial bundle even though
they're only needed after a click.

Converted those imports to React.lazy() and gated each modal with a
new LazyMount helper that mounts on first open and keeps the component
mounted thereafter so AntD close animations still play.

Build now emits a dedicated chunk per modal — InboundFormModal at
66 kB (13 kB gzipped) and InboundInfoModal at 23 kB (4 kB gzipped)
are the largest, totalling roughly 150 kB of code that no longer
parses on first paint. Profiler measured the inbounds-page React
render tree drop from ~444 ms to ~254 ms on a prod build.

* perf(frontend): split codemirror / jalali / otpauth into lazy vendor chunks

Heavy libs (codemirror, persian-calendar-suite, otpauth) and antd's
rc-/cssinjs transitive deps used to fall into the catch-all `vendor`
chunk and load with every entry point. Give them their own manualChunks
groups so they only load with the lazy modal/page that needs them.

Initial vendor (catch-all) drops from 1293 kB / 408 kB gzip to
76 kB / 27 kB gzip; codemirror (408 kB / 131 kB gzip) is now on the
JsonEditor lazy path instead of the inbounds/clients/index initial load.

frontend/src/pages/inbounds/InboundsPage.tsx

@@ -1,5 +1,5 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import { useCallback, useEffect, useMemo, useState } from 'react';
+import { lazy, useCallback, useEffect, useMemo, useState } from 'react';
 import { useTranslation } from 'react-i18next';
 import {
   Card,
@@ -28,14 +28,15 @@ import { useWebSocket } from '@/hooks/useWebSocket';
 import { useNodes } from '@/hooks/useNodes';
 import AppSidebar from '@/components/AppSidebar';
 import CustomStatistic from '@/components/CustomStatistic';
-import TextModal from '@/components/TextModal';
-import PromptModal from '@/components/PromptModal';
+const TextModal = lazy(() => import('@/components/TextModal'));
+const PromptModal = lazy(() => import('@/components/PromptModal'));
 
 import { useInbounds } from './useInbounds';
 import InboundList from './InboundList';
-import InboundFormModal from './InboundFormModal';
-import InboundInfoModal from './InboundInfoModal';
-import QrCodeModal from './QrCodeModal';
+import LazyMount from '@/components/LazyMount';
+const InboundFormModal = lazy(() => import('./InboundFormModal'));
+const InboundInfoModal = lazy(() => import('./InboundInfoModal'));
+const QrCodeModal = lazy(() => import('./QrCodeModal'));
 import '@/styles/page-cards.css';
 import './InboundsPage.css';
 
@@ -517,56 +518,66 @@ export default function InboundsPage() {
           </Layout.Content>
         </Layout>
 
-        <InboundFormModal
-          open={formOpen}
-          onClose={() => setFormOpen(false)}
-          onSaved={refresh}
-          mode={formMode}
-          dbInbound={formDbInbound}
-          dbInbounds={dbInbounds as any[]}
-          availableNodes={nodesList}
-        />
-        <InboundInfoModal
-          open={infoOpen}
-          onClose={() => setInfoOpen(false)}
-          dbInbound={infoDbInbound}
-          clientIndex={infoClientIndex}
-          remarkModel={remarkModel}
-          expireDiff={expireDiff}
-          trafficDiff={trafficDiff}
-          ipLimitEnable={ipLimitEnable}
-          tgBotEnable={tgBotEnable}
-          subSettings={subSettings}
-          lastOnlineMap={lastOnlineMap}
-          nodeAddress={infoNodeAddress}
-        />
-        <QrCodeModal
-          open={qrOpen}
-          onClose={() => setQrOpen(false)}
-          dbInbound={qrDbInbound}
-          client={null}
-          remarkModel={remarkModel}
-          nodeAddress={qrNodeAddress}
-          subSettings={subSettings}
-        />
+        <LazyMount when={formOpen}>
+          <InboundFormModal
+            open={formOpen}
+            onClose={() => setFormOpen(false)}
+            onSaved={refresh}
+            mode={formMode}
+            dbInbound={formDbInbound}
+            dbInbounds={dbInbounds as any[]}
+            availableNodes={nodesList}
+          />
+        </LazyMount>
+        <LazyMount when={infoOpen}>
+          <InboundInfoModal
+            open={infoOpen}
+            onClose={() => setInfoOpen(false)}
+            dbInbound={infoDbInbound}
+            clientIndex={infoClientIndex}
+            remarkModel={remarkModel}
+            expireDiff={expireDiff}
+            trafficDiff={trafficDiff}
+            ipLimitEnable={ipLimitEnable}
+            tgBotEnable={tgBotEnable}
+            subSettings={subSettings}
+            lastOnlineMap={lastOnlineMap}
+            nodeAddress={infoNodeAddress}
+          />
+        </LazyMount>
+        <LazyMount when={qrOpen}>
+          <QrCodeModal
+            open={qrOpen}
+            onClose={() => setQrOpen(false)}
+            dbInbound={qrDbInbound}
+            client={null}
+            remarkModel={remarkModel}
+            nodeAddress={qrNodeAddress}
+            subSettings={subSettings}
+          />
+        </LazyMount>
 
-        <TextModal
-          open={textOpen}
-          onClose={() => setTextOpen(false)}
-          title={textTitle}
-          content={textContent}
-          fileName={textFileName}
-        />
-        <PromptModal
-          open={promptOpen}
-          onClose={() => setPromptOpen(false)}
-          title={promptTitle}
-          okText={promptOkText}
-          type={promptType}
-          initialValue={promptInitial}
-          loading={promptLoading}
-          onConfirm={onPromptConfirm}
-        />
+        <LazyMount when={textOpen}>
+          <TextModal
+            open={textOpen}
+            onClose={() => setTextOpen(false)}
+            title={textTitle}
+            content={textContent}
+            fileName={textFileName}
+          />
+        </LazyMount>
+        <LazyMount when={promptOpen}>
+          <PromptModal
+            open={promptOpen}
+            onClose={() => setPromptOpen(false)}
+            title={promptTitle}
+            okText={promptOkText}
+            type={promptType}
+            initialValue={promptInitial}
+            loading={promptLoading}
+            onConfirm={onPromptConfirm}
+          />
+        </LazyMount>
       </Layout>
     </ConfigProvider>
   );