feat(torrents): add live upload limit control

src/components/PropertiesModal.tsx

@@ -74,7 +74,9 @@ export const PropertiesModal = () => {
   const [speedLimitEnabled, setSpeedLimitEnabled] = useState(false);
   const [speedLimitValue, setSpeedLimitValue] = useState('1024'); // KiB/s
   const [liveSpeedLimitValue, setLiveSpeedLimitValue] = useState('');
+  const [liveTorrentUploadLimitValue, setLiveTorrentUploadLimitValue] = useState('');
   const [isLiveSpeedLimitPending, setIsLiveSpeedLimitPending] = useState(false);
+  const [isLiveTorrentUploadLimitPending, setIsLiveTorrentUploadLimitPending] = useState(false);
 
   const [loginMode, setLoginMode] = useState<LoginMode>('matching');
   const [username, setUsername] = useState('');
@@ -97,6 +99,8 @@ export const PropertiesModal = () => {
     // Invalidate native pickers and transfer-control results when the modal
     // switches items, closes, or reopens for the same download.
     actionRequestRef.current += 1;
+    setIsLiveSpeedLimitPending(false);
+    setIsLiveTorrentUploadLimitPending(false);
   }, [selectedPropertiesDownloadId]);
 
   useEffect(() => {
@@ -168,6 +172,11 @@ export const PropertiesModal = () => {
     setLiveSpeedLimitValue(activeLimit && activeLimit !== '0' ? activeLimit : '');
   }, [item?.speedLimit, selectedPropertiesDownloadId]);
 
+  useEffect(() => {
+    const activeLimit = item?.torrentUploadLimit?.trim();
+    setLiveTorrentUploadLimitValue(activeLimit && activeLimit !== '0' ? activeLimit : '');
+  }, [item?.torrentUploadLimit, selectedPropertiesDownloadId]);
+
   useEffect(() => {
     if (!selectedPropertiesDownloadId || connectionsDirty) return;
     const activeItem = useDownloadStore.getState().downloads.find(d => d.id === selectedPropertiesDownloadId);
@@ -321,10 +330,43 @@ export const PropertiesModal = () => {
     }
   };
 
+  const handleLiveTorrentUploadLimit = async (limit: string | null) => {
+    if (
+      isLiveTorrentUploadLimitPending
+      || !item.isTorrent
+      || !['downloading', 'seeding', 'retrying'].includes(item.status)
+    ) return;
+
+    setErrorMessage('');
+    const requestId = ++actionRequestRef.current;
+    setIsLiveTorrentUploadLimitPending(true);
+    try {
+      await useDownloadStore.getState().setTorrentUploadLimit(item.id, limit);
+      if (
+        limit === null
+        && requestId === actionRequestRef.current
+        && useDownloadStore.getState().selectedPropertiesDownloadId === item.id
+      ) {
+        setLiveTorrentUploadLimitValue('');
+      }
+    } catch (error) {
+      if (requestId === actionRequestRef.current && useDownloadStore.getState().selectedPropertiesDownloadId === item.id) {
+        setErrorMessage(t($ => $.properties.liveTorrentUploadLimitFailed, {
+          detail: error instanceof Error ? error.message : String(error)
+        }));
+      }
+    } finally {
+      if (requestId === actionRequestRef.current && useDownloadStore.getState().selectedPropertiesDownloadId === item.id) {
+        setIsLiveTorrentUploadLimitPending(false);
+      }
+    }
+  };
+
   const identityLocked = getIdentityLocked(item.status);
   const transferLocked = getTransferLocked(item.status);
   const liveSpeedLimitAvailable = !item.isMedia && ['downloading', 'retrying'].includes(item.status);
   const liveSpeedLimitUnavailable = item.isMedia && ['downloading', 'processing', 'retrying'].includes(item.status);
+  const liveTorrentUploadLimitAvailable = item.isTorrent && ['downloading', 'seeding', 'retrying'].includes(item.status);
   const configuredConnections = resolveDownloadConnections(item.connections, perServerConnections);
   const observedConnectionTotal = Math.max(
     1,
@@ -611,6 +653,45 @@ export const PropertiesModal = () => {
                   )}
                 </div>
               )}
+              {liveTorrentUploadLimitAvailable && (
+                <div className="col-start-2 rounded-lg border border-border-modal bg-bg-input/30 p-3 space-y-2">
+                  <label htmlFor="live-torrent-upload-limit" className="block text-xs font-semibold text-text-primary">
+                    {t($ => $.properties.liveTorrentUploadLimit)}
+                  </label>
+                  <div className="flex flex-wrap items-center gap-2">
+                    <input
+                      id="live-torrent-upload-limit"
+                      type="text"
+                      inputMode="decimal"
+                      value={liveTorrentUploadLimitValue}
+                      onChange={event => setLiveTorrentUploadLimitValue(event.currentTarget.value)}
+                      placeholder={t($ => $.properties.liveTorrentUploadLimitPlaceholder)}
+                      disabled={isLiveTorrentUploadLimitPending}
+                      aria-describedby="live-torrent-upload-limit-hint"
+                      className="app-control w-32 px-2.5 py-1.5 text-xs font-mono disabled:opacity-50"
+                    />
+                    <button
+                      type="button"
+                      onClick={() => void handleLiveTorrentUploadLimit(liveTorrentUploadLimitValue)}
+                      disabled={isLiveTorrentUploadLimitPending}
+                      className="app-button app-button-primary px-3 text-xs disabled:opacity-50"
+                    >
+                      {t($ => $.properties.liveSpeedLimitApply)}
+                    </button>
+                    <button
+                      type="button"
+                      onClick={() => void handleLiveTorrentUploadLimit(null)}
+                      disabled={isLiveTorrentUploadLimitPending || !liveTorrentUploadLimitValue}
+                      className="app-button px-3 text-xs disabled:opacity-50"
+                    >
+                      {t($ => $.properties.liveSpeedLimitClear)}
+                    </button>
+                  </div>
+                  <p id="live-torrent-upload-limit-hint" className="text-[11px] text-text-muted">
+                    {t($ => $.properties.liveTorrentUploadLimitHint)}
+                  </p>
+                </div>
+              )}
             </div>
           </section>
 

src/i18n/catalogs/en.ts

@@ -228,6 +228,10 @@ const common = {
     liveSpeedLimitClear: 'Clear',
     liveSpeedLimitFailed: 'Could not update live speed cap: {{detail}}',
     liveSpeedLimitUnavailable: 'Live speed control is unavailable for media downloads while running.',
+    liveTorrentUploadLimit: 'Live Torrent upload limit',
+    liveTorrentUploadLimitHint: 'Applies to active Torrent downloads and seeding. Clear it to remove the per-Torrent upload cap.',
+    liveTorrentUploadLimitPlaceholder: 'e.g. 1024K',
+    liveTorrentUploadLimitFailed: 'Could not update the live Torrent upload limit: {{detail}}',
     category: 'Category',
     lastTry: 'Last try',
     dateAdded: 'Date added',

src/i18n/catalogs/fa.ts

@@ -228,6 +228,10 @@ const fa = {
     liveSpeedLimitClear: 'پاک کردن',
     liveSpeedLimitFailed: 'به‌روزرسانی سقف سرعت زنده ممکن نیست: {{detail}}',
     liveSpeedLimitUnavailable: 'تغییر زنده سرعت دانلودهای رسانه‌ای هنگام اجرا در دسترس نیست.',
+    liveTorrentUploadLimit: 'محدودیت زنده آپلود تورنت',
+    liveTorrentUploadLimitHint: 'برای تورنت‌های فعال و در حال سید اعمال می‌شود. برای حذف محدودیت آپلود تورنت، آن را پاک کنید.',
+    liveTorrentUploadLimitPlaceholder: 'مثلاً 1024K',
+    liveTorrentUploadLimitFailed: 'به‌روزرسانی محدودیت زنده آپلود تورنت ممکن نیست: {{detail}}',
     category: 'دسته',
     lastTry: 'آخرین تلاش',
     dateAdded: 'تاریخ افزودن',

src/i18n/catalogs/he.ts

@@ -228,6 +228,10 @@ const he = {
     liveSpeedLimitClear: 'נקה',
     liveSpeedLimitFailed: 'לא ניתן לעדכן את הגבלת המהירות בזמן אמת: {{detail}}',
     liveSpeedLimitUnavailable: 'שליטה במהירות בזמן אמת אינה זמינה להורדות מדיה בזמן שהן פועלות.',
+    liveTorrentUploadLimit: 'הגבלת העלאת טורנט בזמן אמת',
+    liveTorrentUploadLimitHint: 'חל על הורדות טורנט פעילות ושיתוף. נקה כדי להסיר את הגבלת ההעלאה של הטורנט.',
+    liveTorrentUploadLimitPlaceholder: 'לדוגמה 1024K',
+    liveTorrentUploadLimitFailed: 'לא ניתן לעדכן את הגבלת העלאת הטורנט בזמן אמת: {{detail}}',
     category: 'קטגוריה',
     lastTry: 'ניסיון אחרון',
     dateAdded: 'תאריך הוספה',

src/i18n/catalogs/ru.ts

@@ -228,6 +228,10 @@ const ru = {
     liveSpeedLimitClear: 'Очистить',
     liveSpeedLimitFailed: 'Не удалось обновить текущее ограничение скорости: {{detail}}',
     liveSpeedLimitUnavailable: 'Изменение скорости медиазагрузок во время работы недоступно.',
+    liveTorrentUploadLimit: 'Текущий лимит отдачи торрента',
+    liveTorrentUploadLimitHint: 'Применяется к активным торрентам и раздаче. Очистите поле, чтобы убрать лимит отдачи для торрента.',
+    liveTorrentUploadLimitPlaceholder: 'например, 1024K',
+    liveTorrentUploadLimitFailed: 'Не удалось обновить текущий лимит отдачи торрента: {{detail}}',
     category: 'Категория',
     lastTry: 'Последняя попытка',
     dateAdded: 'Дата добавления',

src/i18n/catalogs/uk.ts

@@ -228,6 +228,10 @@ const uk = {
     liveSpeedLimitClear: 'Очистити',
     liveSpeedLimitFailed: 'Не вдалося оновити поточне обмеження швидкості: {{detail}}',
     liveSpeedLimitUnavailable: 'Зміна швидкості медіазавантажень під час роботи недоступна.',
+    liveTorrentUploadLimit: 'Поточний ліміт віддачі торрента',
+    liveTorrentUploadLimitHint: 'Застосовується до активних торрентів і роздачі. Очистіть поле, щоб прибрати ліміт віддачі торрента.',
+    liveTorrentUploadLimitPlaceholder: 'наприклад, 1024K',
+    liveTorrentUploadLimitFailed: 'Не вдалося оновити поточний ліміт віддачі торрента: {{detail}}',
     category: 'Категорія',
     lastTry: 'Остання спроба',
     dateAdded: 'Дата додавання',

src/i18n/catalogs/zh-CN.ts

@@ -228,6 +228,10 @@ const zhCN = {
     liveSpeedLimitClear: '清除',
     liveSpeedLimitFailed: '无法更新实时速度上限：{{detail}}',
     liveSpeedLimitUnavailable: '媒体下载运行时无法使用实时速度控制。',
+    liveTorrentUploadLimit: '实时种子上传限速',
+    liveTorrentUploadLimitHint: '适用于活跃的种子下载和做种。清空后可移除该种子的上传限速。',
+    liveTorrentUploadLimitPlaceholder: '例如 1024K',
+    liveTorrentUploadLimitFailed: '无法更新实时种子上传限速：{{detail}}',
     category: '类别',
     lastTry: '上次尝试',
     dateAdded: '添加日期',

src/ipc.ts

@@ -70,6 +70,7 @@ type CommandMap = {
   set_concurrent_limit: { args: { limit: number }; result: void };
   set_queue_concurrency_limits: { args: { limits: QueueConcurrencyConfig[] }; result: void };
   set_download_speed_limit: { args: { id: string; limit: string | null }; result: void };
+  set_torrent_upload_limit: { args: { id: string; limit: string | null }; result: void };
   set_global_speed_limit: { args: { limit: string | null }; result: void };
   request_automation_permission: { args: undefined; result: void };
   check_automation_permission: { args: undefined; result: void };

src/store/useDownloadStore.test.ts

@@ -396,6 +396,71 @@ describe('useDownloadStore', () => {
     expect(useDownloadStore.getState().downloads[0].speedLimit).toBeUndefined();
   });
 
+  it('updates an active Torrent upload limit while seeding and clears it', async () => {
+    useDownloadStore.setState({
+      downloads: [{
+        id: 'live-torrent-upload',
+        status: 'seeding',
+        isMedia: false,
+        isTorrent: true,
+        torrentUploadLimit: '512K'
+      }] as any[]
+    });
+    vi.mocked(ipc.invokeCommand).mockResolvedValue(undefined as never);
+
+    await useDownloadStore.getState().setTorrentUploadLimit('live-torrent-upload', '2M');
+
+    expect(ipc.invokeCommand).toHaveBeenCalledWith('set_torrent_upload_limit', {
+      id: 'live-torrent-upload',
+      limit: '2M'
+    });
+    expect(useDownloadStore.getState().downloads[0].torrentUploadLimit).toBe('2M');
+
+    await useDownloadStore.getState().setTorrentUploadLimit('live-torrent-upload', null);
+    const uploadLimitCalls = vi.mocked(ipc.invokeCommand).mock.calls
+      .filter(([command]) => command === 'set_torrent_upload_limit');
+    expect(uploadLimitCalls[uploadLimitCalls.length - 1]).toEqual(['set_torrent_upload_limit', {
+      id: 'live-torrent-upload',
+      limit: null
+    }]);
+    expect(useDownloadStore.getState().downloads[0].torrentUploadLimit).toBeUndefined();
+  });
+
+  it('rejects live Torrent upload control for ordinary or inactive downloads', async () => {
+    useDownloadStore.setState({
+      downloads: [
+        { id: 'ordinary-upload', status: 'downloading', isMedia: false, isTorrent: false },
+        { id: 'paused-upload', status: 'paused', isMedia: false, isTorrent: true }
+      ] as any[]
+    });
+
+    await expect(useDownloadStore.getState().setTorrentUploadLimit('ordinary-upload', '2M'))
+      .rejects.toThrow('only for Torrent');
+    await expect(useDownloadStore.getState().setTorrentUploadLimit('paused-upload', '2M'))
+      .rejects.toThrow('active Torrent');
+    expect(ipc.invokeCommand).not.toHaveBeenCalledWith('set_torrent_upload_limit', expect.anything());
+  });
+
+  it('keeps the prior Torrent upload limit when the backend rejects the update', async () => {
+    useDownloadStore.setState({
+      downloads: [{
+        id: 'live-torrent-upload-failure',
+        status: 'downloading',
+        isMedia: false,
+        isTorrent: true,
+        torrentUploadLimit: '512K'
+      }] as any[]
+    });
+    vi.mocked(ipc.invokeCommand).mockImplementation(async command => {
+      if (command === 'set_torrent_upload_limit') throw new Error('aria2 unavailable');
+      return undefined;
+    });
+
+    await expect(useDownloadStore.getState().setTorrentUploadLimit('live-torrent-upload-failure', '2M'))
+      .rejects.toThrow('aria2 unavailable');
+    expect(useDownloadStore.getState().downloads[0].torrentUploadLimit).toBe('512K');
+  });
+
   it('rejects live speed changes for media and inactive downloads', async () => {
     useDownloadStore.setState({
       downloads: [

src/store/useDownloadStore.ts

@@ -800,6 +800,7 @@ interface DownloadState {
   pauseAll: () => Promise<number>;
   assignToQueue: (ids: string[], queueId: string) => Promise<void>;
   setDownloadSpeedLimit: (id: string, limit: string | null) => Promise<void>;
+  setTorrentUploadLimit: (id: string, limit: string | null) => Promise<void>;
   setQueueConcurrency: (id: string, maxConcurrent: number | null) => Promise<void>;
   addQueue: (name: string) => boolean;
   renameQueue: (id: string, name: string) => boolean;
@@ -1886,6 +1887,39 @@ export const useDownloadStore = create<DownloadState>((set, get) => {
     true,
     preemptDispatch
   ),
+  setTorrentUploadLimit: (id, limit) => runDownloadLifecycleOperation(
+    id,
+    'torrent-upload-limit',
+    async () => {
+      await waitForPendingStartupResume();
+      const item = get().downloads.find(download => download.id === id);
+      if (!item) throw new Error('Download no longer exists.');
+      if (!item.isTorrent) {
+        throw new Error('Live upload control is available only for Torrent downloads.');
+      }
+      if (!['downloading', 'seeding', 'retrying'].includes(item.status)) {
+        throw new Error('Live upload control requires an active Torrent.');
+      }
+
+      const trimmed = limit?.trim() || '';
+      const normalizedLimit = trimmed
+        ? normalizeSpeedLimitForBackend(trimmed)
+        : null;
+      if (trimmed && normalizedLimit === null) {
+        throw new Error('Enter a valid Torrent upload limit.');
+      }
+
+      await invoke('set_torrent_upload_limit', {
+        id,
+        limit: normalizedLimit
+      });
+      if (get().downloads.some(download => download.id === id)) {
+        get().updateDownload(id, { torrentUploadLimit: normalizedLimit ?? undefined });
+      }
+    },
+    true,
+    preemptDispatch
+  ),
   setQueueConcurrency: (id, maxConcurrent) => {
     const operation = queueConfigurationQueue.then(async () => {
       if (