chore(frontend): update dependencies and adapt to oxlint 1.79

npm install was failing with ERESOLVE: the lockfile pinned storybook 10.5.7
and vitest 4.1.10 as peers while package.json asked for ^10.5.9 and ^4.1.11,
and npm would not move either. Neither npm update, a targeted install, nor
--package-lock-only broke the cycle, so node_modules and package-lock.json
were regenerated from scratch (601 packages, 0 vulnerabilities).

oxlint 1.79.0 then promoted five React Compiler rules into the correctness
category, flagging 101 pre-existing sites. 1.78.0 exits 0 on the same tree,
so nothing in our code changed - the rule set grew. They are fixed rather
than suppressed:

- refs (31): latest-value ref writes moved out of render into an effect.
  onlineClientsRef turned out to be write-only and is gone; expireDiffRef
  and trafficDiffRef were replaced by reading the values directly.
- set-state-in-effect (55): reset-on-open modals now adjust state during
  render; where an effect mixed a synchronous reset with an async fetch, the
  reset moved to render and the effect kept only the request. useMediaQuery
  became useSyncExternalStore.
- preserve-manual-memoization (11): optional-chained deps the compiler cannot
  match, hoisted to locals or dropped where the memo wrapped a string concat.
- purity (3): Date.now() in render replaced by a state-backed clock, which
  also refreshes the expiry tag every 60s instead of freezing it until the
  next unrelated re-render.
- immutability (1): applyClientStatsEvent merged websocket traffic into
  DBInbound rows in place; it now rebuilds only the rows it touches.

Two things fell out of that. clientCount is derived with useMemo instead of
an imperative rebuildClientCount() called from five sites, which also fixes a
staleness bug where changing the expiry or traffic threshold left the counts
alone until some later rebuild. statsVersion existed only to force a
re-render after an in-place mutation, is meaningless now that rows are
replaced, and nothing read it, so it is removed.

Also adds a lint:fix script - oxlint --fix was previously only reachable
through the lint-staged hook.

frontend/src/components/feedback/PromptModal.tsx

@@ -33,15 +33,21 @@ export default function PromptModal({
   const textareaRef = useRef<HTMLTextAreaElement | null>(null);
   const inputRef = useRef<InputRef | null>(null);
 
+  const [openedWith, setOpenedWith] = useState<string | null>(null);
+  const openKey = open ? `${type}\u0000${initialValue}` : null;
+  if (openKey !== openedWith) {
+    setOpenedWith(openKey);
+    if (open) setValue(initialValue);
+  }
+
   useEffect(() => {
-    if (open) {
-      setValue(initialValue);
-      setTimeout(() => {
-        if (type === 'textarea') textareaRef.current?.focus();
-        else inputRef.current?.focus();
-      }, 50);
-    }
-  }, [open, initialValue, type]);
+    if (!open) return;
+    const id = setTimeout(() => {
+      if (type === 'textarea') textareaRef.current?.focus();
+      else inputRef.current?.focus();
+    }, 50);
+    return () => clearTimeout(id);
+  }, [open, type]);
 
   function onKeydown(e: React.KeyboardEvent<HTMLTextAreaElement | HTMLInputElement>) {
     if (type !== 'textarea' && e.key === 'Enter') {

frontend/src/components/feedback/TextModal.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useCallback, useState } from 'react';
 import { Button, Input, Modal, Tabs, message } from 'antd';
 import { CopyOutlined, DownloadOutlined } from '@ant-design/icons';
 import { useTranslation } from 'react-i18next';
@@ -35,9 +35,12 @@ export default function TextModal({
   const [messageApi, messageContextHolder] = message.useMessage();
   const [activeKey, setActiveKey] = useState('');
 
-  useEffect(() => {
-    if (open && tabs && tabs.length > 0) setActiveKey(tabs[0].key);
-  }, [open, tabs]);
+  // Reset on the way out so the next open starts on the first tab; activeTab
+  // falls back to tabs[0] whenever activeKey no longer matches.
+  const close = useCallback(() => {
+    setActiveKey('');
+    onClose();
+  }, [onClose]);
 
   const activeTab = tabs?.find((tab) => tab.key === activeKey) ?? tabs?.[0];
   const activeContent = activeTab ? activeTab.content : content;
@@ -46,7 +49,7 @@ export default function TextModal({
     const ok = await ClipboardManager.copyText(activeContent || '');
     if (ok) {
       messageApi.success(t('copied'));
-      onClose();
+      close();
     }
   }
 
@@ -61,7 +64,7 @@ export default function TextModal({
       <Modal
         open={open}
         title={title}
-        onCancel={onClose}
+        onCancel={close}
         destroyOnHidden
         footer={
           <>