Merge branch 'fix/large-download-paths'

Concurrent-transfer limits, with the queue, the pause and the flag day.

A node now caps how many transfers it runs at once (8 downloads, 8 uploads,
node-wide) and how many one member may run in one group (2 by default,
operator-signed). Beyond that the node answers "queued" and the client waits its
turn, visibly, in the transfers panel — and a slot that frees starts whatever is
next, skipping past a member who is at their own cap rather than letting them
stall everyone behind them.

Browsing is never subject to a slot: not the poster grid, not the covers, not
opening a photo to look at it. That is structural — a transfer is what the
transfers widget shows — and the exemption is bounded rather than open, at two
files in flight per session, because an exemption with no bound is a leaseless
branch under another name.

Transfers can be cancelled, and now paused and resumed. A paused one holds
nothing: its slot goes back at once and resuming rejoins the queue at the tail.
Uploads survive the connection that started them and resume where the node
stopped, asked for inside the seal rather than on a clear message. What they
leave behind when they are abandoned is reaped, which closes a disk leak that
predates this work.

MNP 3.0 makes the lease compulsory and refuses 2.x at the handshake, with the
desktop client checking `client.minimum` before connecting so an un-updated one
says "update" instead of failing every connection in a protocol vocabulary.

Fourteen defects were found on the way, eight of them by a person clicking
Download and pasting a console — none of which 2075 tests could reach. Section
12 of ~/next/improve-downloads.md is that report, including the three this work
introduced itself and the one that turned out to be caused by an instruction to
hard-reload after each deployment.

Node suite 1209 passed, hub suite 866 passed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HCGdheDLxGReuKHga3BtST

10 files changed, 250 insertions, 10 deletions

diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
index 97a835d..0f632e3 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
@@ -162,6 +162,8 @@ export default {
   'group.mkdir': 'Neuer Ordner',
   'group.mkdir_prompt': 'Name des neuen Ordners',
   'group.mkdir_offline': 'Nicht mit dem Node verbunden.',
+  'group.download_offline': 'Keine Verbindung zum Node — der Download kann nicht starten. Die Verbindung wird automatisch wiederhergestellt; versuchen Sie es gleich erneut.',
+  'group.download_write_stalled': 'Die Datei wird nicht mehr auf die Festplatte geschrieben ({seconds} s ohne Fortschritt). Der Download wurde abgebrochen statt hängen gelassen; versuchen Sie es erneut.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -216,6 +218,8 @@ export default {
   'video.close': 'Schließen (Esc)',
   'preview.pdf_fallback': 'Dieser Browser zeigt das PDF nicht direkt an. Laden Sie es '
     + 'stattdessen herunter — entschlüsselt wurde es ohnehin hier.',
+  'preview.too_large': 'Diese Datei ist {size} groß, mehr als diese Seite im Arbeitsspeicher halten kann ({limit}). Laden Sie sie stattdessen herunter — ein Download wird direkt auf die Festplatte geschrieben.',
+  'download.too_large_for_memory': '„{name}“ ist {size} groß. Dieser Browser kann eine Datei dieser Größe nur speichern, indem er sie direkt auf die Festplatte schreibt, und das ist hier nicht möglich — er müsste die ganze Datei im Arbeitsspeicher halten. Laden Sie die Seite neu und versuchen Sie es erneut; falls das nicht hilft, verwenden Sie die Desktop-App.',
   'group.upload_indexing': 'wird indiziert …',
   'video.err_transport': 'Transport nicht verbunden',
   'video.err_mse': 'Codec wird für das Streaming nicht unterstützt: {codec}',
@@ -313,7 +317,7 @@ export default {
     + 'auch wenn Sie eine Auswahl herunterladen.',
   'settings.dl_folder': 'Ordner: {name}',
   'settings.dl_no_folder': 'Kein Ordner ausgewählt — Downloads landen dort, wo Ihr '
-    + 'Browser sie ablegt',
+    + 'Browser sie ablegt, und sie lassen sich nicht anhalten',
   'settings.dl_choose': 'Ordner auswählen',
   'settings.dl_change': 'Ändern',
   'settings.dl_forget': 'Verwerfen',
@@ -574,6 +578,24 @@ export default {
   'transfers.open': 'Öffnen',
   'transfers.done': 'Abgeschlossen',
   'transfers.cancelled': 'Abgebrochen',
+  'transfers.preparing': 'Wird vorbereitet…',
+  'transfers.waiting_own_slots': 'Wartet — Ihre Plätze sind belegt',
+  'transfers.waiting_node': 'Wartet — {n} davor',
+  'transfers.summary': '{running} laufend · {waiting} wartend',
+  'transfers.group_running': 'Laufend',
+  'transfers.group_waiting': 'Wartend',
+  'transfers.group_paused': 'Angehalten',
+  'transfers.group_finished': 'Abgeschlossen',
+  'transfers.cancel_one': '{name} abbrechen',
+  'transfers.pause': 'Anhalten',
+  'transfers.resume': 'Fortsetzen',
+  'transfers.paused': 'Angehalten',
+  'transfers.not_pausable': 'Kann nicht angehalten werden — wählen Sie in den Einstellungen einen Download-Ordner',
+  'transfers.pause_one': '{name} anhalten',
+  'transfers.resume_one': '{name} fortsetzen',
+  'transfers.eta_seconds': 'noch {n} s',
+  'transfers.eta_minutes': 'noch {n} Min.',
+  'transfers.eta_hours': 'noch {n} Std.',
   'transfers.failed': 'Fehlgeschlagen',
   'group.select': 'Auswählen',
   'group.select_done': 'Fertig',
@@ -737,6 +759,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Max. gleichzeitige Downloads',
+  'node.setting_max_uploads': 'Max. gleichzeitige Uploads',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
index c55a702..cb7f4a0 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
@@ -162,6 +162,8 @@ export default {
   'group.mkdir': 'New folder',
   'group.mkdir_prompt': 'New folder name',
   'group.mkdir_offline': 'Not connected to the node.',
+  'group.download_offline': 'Not connected to the node — the download cannot start. It reconnects on its own; try again in a moment.',
+  'group.download_write_stalled': 'The file stopped being written to disk ({seconds}s with no progress). The download was stopped rather than left hanging; try it again.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -214,6 +216,8 @@ export default {
   'video.from_start': "Start from the beginning",
   'video.close': 'Close (Esc)',
   'preview.pdf_fallback': 'This browser will not display the PDF inline. Download it instead — it was decrypted here either way.',
+  'preview.too_large': 'This file is {size}, more than this page can hold in memory ({limit}). Download it instead — a download is written straight to disk.',
+  'download.too_large_for_memory': '"{name}" is {size}. This browser can only save a file that large by streaming it to disk, and it has no way to do that here — it would have to hold the whole file in memory. Reload the page and try again; if that does not help, use the desktop app.',
   'group.upload_indexing': 'indexing…',
   'video.err_transport': 'Transport not connected',
   'video.err_mse': 'Codec not supported for streaming: {codec}',
@@ -311,7 +315,7 @@ export default {
     + 'including when you download a selection.',
   'settings.dl_folder': 'Folder: {name}',
   'settings.dl_no_folder': 'No folder chosen — downloads go wherever your browser '
-    + 'puts them',
+    + 'puts them, and they cannot be paused',
   'settings.dl_choose': 'Choose folder',
   'settings.dl_change': 'Change',
   'settings.dl_forget': 'Forget',
@@ -690,6 +694,24 @@ export default {
   'transfers.open': 'Open',
   'transfers.done': 'Finished',
   'transfers.cancelled': 'Cancelled',
+  'transfers.preparing': 'Preparing…',
+  'transfers.waiting_own_slots': 'Waiting — your slots are busy',
+  'transfers.waiting_node': 'Waiting — {n} ahead',
+  'transfers.summary': '{running} running · {waiting} waiting',
+  'transfers.group_running': 'Running',
+  'transfers.group_waiting': 'Waiting',
+  'transfers.group_paused': 'Paused',
+  'transfers.group_finished': 'Finished',
+  'transfers.cancel_one': 'Cancel {name}',
+  'transfers.pause': 'Pause',
+  'transfers.resume': 'Resume',
+  'transfers.paused': 'Paused',
+  'transfers.not_pausable': 'Cannot be paused — choose a download folder in Settings to enable it',
+  'transfers.pause_one': 'Pause {name}',
+  'transfers.resume_one': 'Resume {name}',
+  'transfers.eta_seconds': '{n}s left',
+  'transfers.eta_minutes': '{n} min left',
+  'transfers.eta_hours': '{n} h left',
   'transfers.failed': 'Failed',
   'group.select': 'Select',
   'group.select_done': 'Done',
@@ -888,6 +910,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Max concurrent downloads',
+  'node.setting_max_uploads': 'Max concurrent uploads',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
index 9ce3900..fe1c13b 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
@@ -160,6 +160,8 @@ export default {
   'group.mkdir': 'Nueva carpeta',
   'group.mkdir_prompt': 'Nombre de la nueva carpeta',
   'group.mkdir_offline': 'Sin conexión con el nodo.',
+  'group.download_offline': 'Sin conexión con el nodo — la descarga no puede empezar. Se reconecta sola; inténtelo de nuevo en un momento.',
+  'group.download_write_stalled': 'El archivo dejó de escribirse en el disco ({seconds} s sin avance). La descarga se detuvo en lugar de quedarse colgada; inténtelo de nuevo.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -214,6 +216,8 @@ export default {
   'video.close': 'Cerrar (Esc)',
   'preview.pdf_fallback': 'Este navegador no mostrará el PDF integrado. Descárguelo '
     + 'en su lugar — en cualquier caso se descifró aquí.',
+  'preview.too_large': 'Este archivo ocupa {size}, más de lo que esta página puede mantener en memoria ({limit}). Descárguelo en su lugar — una descarga se escribe directamente en disco.',
+  'download.too_large_for_memory': '«{name}» ocupa {size}. Este navegador solo puede guardar un archivo así transmitiéndolo al disco, y aquí no puede hacerlo — tendría que mantener el archivo entero en memoria. Recargue la página e inténtelo de nuevo; si eso no ayuda, use la aplicación de escritorio.',
   'group.upload_indexing': 'indexando…',
   'video.err_transport': 'Transporte no conectado',
   'video.err_mse': 'Códec no compatible con la reproducción en continuo: {codec}',
@@ -311,7 +315,7 @@ export default {
     + 'también cuando descarga una selección.',
   'settings.dl_folder': 'Carpeta: {name}',
   'settings.dl_no_folder': 'Ninguna carpeta elegida — las descargas van adonde las '
-    + 'ponga su navegador',
+    + 'ponga su navegador, y no se pueden pausar',
   'settings.dl_choose': 'Elegir carpeta',
   'settings.dl_change': 'Cambiar',
   'settings.dl_forget': 'Olvidar',
@@ -570,6 +574,24 @@ export default {
   'transfers.open': 'Abrir',
   'transfers.done': 'Terminada',
   'transfers.cancelled': 'Cancelada',
+  'transfers.preparing': 'Preparando…',
+  'transfers.waiting_own_slots': 'En espera — sus espacios están ocupados',
+  'transfers.waiting_node': 'En espera — {n} por delante',
+  'transfers.summary': '{running} en curso · {waiting} en espera',
+  'transfers.group_running': 'En curso',
+  'transfers.group_waiting': 'En espera',
+  'transfers.group_paused': 'En pausa',
+  'transfers.group_finished': 'Finalizados',
+  'transfers.cancel_one': 'Cancelar {name}',
+  'transfers.pause': 'Pausar',
+  'transfers.resume': 'Reanudar',
+  'transfers.paused': 'En pausa',
+  'transfers.not_pausable': 'No se puede pausar — elija una carpeta de descargas en Ajustes para activarlo',
+  'transfers.pause_one': 'Pausar {name}',
+  'transfers.resume_one': 'Reanudar {name}',
+  'transfers.eta_seconds': 'quedan {n} s',
+  'transfers.eta_minutes': 'quedan {n} min',
+  'transfers.eta_hours': 'quedan {n} h',
   'transfers.failed': 'Fallida',
   'group.select': 'Seleccionar',
   'group.select_done': 'Listo',
@@ -732,6 +754,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Descargas simultáneas máximas',
+  'node.setting_max_uploads': 'Subidas simultáneas máximas',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
index d612f71..ea3f60e 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
@@ -161,6 +161,8 @@ export default {
   'group.mkdir': 'Nouveau dossier',
   'group.mkdir_prompt': 'Nom du nouveau dossier',
   'group.mkdir_offline': 'Non connecté au nœud.',
+  'group.download_offline': 'Pas de connexion au node — le téléchargement ne peut pas démarrer. La reconnexion est automatique, réessayez dans un instant.',
+  'group.download_write_stalled': 'L\'écriture du fichier sur le disque s\'est arrêtée ({seconds} s sans progression). Le téléchargement a été interrompu plutôt que laissé en suspens ; réessayez.',
   'device.add_title': 'Ce navigateur n’est pas encore lié à ce nœud',
   'device.add_hint': 'Votre compte est connu ici, mais ce navigateur détient une autre clé. Approuvez-le depuis un appareil déjà lié — sans passer par l’opérateur.',
   'device.add_btn': 'Obtenir un code de liaison',
@@ -215,6 +217,8 @@ export default {
   'video.close': 'Fermer (Échap)',
   'preview.pdf_fallback': 'Ce navigateur n’affichera pas le PDF directement. '
     + 'Téléchargez-le plutôt — il a été déchiffré ici dans les deux cas.',
+  'preview.too_large': 'Ce fichier fait {size}, plus que cette page ne peut garder en mémoire ({limit}). Téléchargez-le plutôt — un téléchargement est écrit directement sur le disque.',
+  'download.too_large_for_memory': '« {name} » fait {size}. Ce navigateur ne peut enregistrer un fichier de cette taille qu\'en l\'écrivant au fil de l\'eau sur le disque, ce qu\'il ne peut pas faire ici — il devrait garder le fichier entier en mémoire. Rechargez la page et réessayez ; si cela ne suffit pas, utilisez l\'application de bureau.',
   'group.upload_indexing': 'indexation…',
   'video.err_transport': 'Transport non connecté',
   'video.err_mse': 'Codec non pris en charge pour la diffusion : {codec}',
@@ -312,7 +316,7 @@ export default {
     + 'un par fichier, y compris lorsque vous téléchargez une sélection.',
   'settings.dl_folder': 'Dossier : {name}',
   'settings.dl_no_folder': 'Aucun dossier choisi — les téléchargements vont là où '
-    + 'votre navigateur les place',
+    + 'votre navigateur les place, et ne peuvent pas être suspendus',
   'settings.dl_choose': 'Choisir un dossier',
   'settings.dl_change': 'Changer',
   'settings.dl_forget': 'Oublier',
@@ -573,6 +577,24 @@ export default {
   'transfers.open': 'Ouvrir',
   'transfers.done': 'Terminé',
   'transfers.cancelled': 'Annulé',
+  'transfers.preparing': 'Préparation…',
+  'transfers.waiting_own_slots': 'En attente — vos slots sont occupés',
+  'transfers.waiting_node': 'En attente — {n} devant',
+  'transfers.summary': '{running} en cours · {waiting} en attente',
+  'transfers.group_running': 'En cours',
+  'transfers.group_waiting': 'En attente',
+  'transfers.group_paused': 'En pause',
+  'transfers.group_finished': 'Terminés',
+  'transfers.cancel_one': 'Annuler {name}',
+  'transfers.pause': 'Suspendre',
+  'transfers.resume': 'Reprendre',
+  'transfers.paused': 'En pause',
+  'transfers.not_pausable': 'Non suspendable — choisissez un dossier de téléchargement dans les Réglages pour l\'activer',
+  'transfers.pause_one': 'Suspendre {name}',
+  'transfers.resume_one': 'Reprendre {name}',
+  'transfers.eta_seconds': '{n} s restantes',
+  'transfers.eta_minutes': '{n} min restantes',
+  'transfers.eta_hours': '{n} h restantes',
   'transfers.failed': 'Échec',
   'group.select': 'Sélectionner',
   'group.select_done': 'Terminé',
@@ -735,6 +757,8 @@ export default {
   'node.setting_pair_ttl': 'Durée du code d\'appairage',
   'node.setting_device_ttl': 'Durée des demandes d\'appareil',
   'node.setting_max_streams': 'Flux vidéo simultanés max',
+  'node.setting_max_downloads': 'Téléchargements simultanés max',
+  'node.setting_max_uploads': 'Téléversements simultanés max',
   'node.setting_transcode': 'Transcoder les vidéos incompatibles',
   'node.setting_unit_hours': 'heures',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
index c61b8e5..0687b25 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
@@ -161,6 +161,8 @@ export default {
   'group.mkdir': 'Nuova cartella',
   'group.mkdir_prompt': 'Nome della nuova cartella',
   'group.mkdir_offline': 'Non connesso al nodo.',
+  'group.download_offline': 'Nessuna connessione al nodo — il download non può iniziare. La riconnessione è automatica, riprovi tra poco.',
+  'group.download_write_stalled': 'Il file ha smesso di essere scritto su disco ({seconds} s senza progressi). Il download è stato interrotto invece di restare bloccato; riprovi.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -215,6 +217,8 @@ export default {
   'video.close': 'Chiudi (Esc)',
   'preview.pdf_fallback': 'Questo browser non mostrerà il PDF nella pagina. Lo scarichi '
     + 'invece — in ogni caso è stato decifrato qui.',
+  'preview.too_large': 'Questo file è di {size}, più di quanto questa pagina possa tenere in memoria ({limit}). Lo scarichi invece — un download viene scritto direttamente su disco.',
+  'download.too_large_for_memory': '«{name}» è di {size}. Questo browser può salvare un file di queste dimensioni solo scrivendolo su disco man mano, e qui non può farlo — dovrebbe tenere l’intero file in memoria. Ricarichi la pagina e riprovi; se non basta, usi l’applicazione desktop.',
   'group.upload_indexing': 'indicizzazione…',
   'video.err_transport': 'Trasporto non connesso',
   'video.err_mse': 'Codec non supportato per lo streaming: {codec}',
@@ -312,7 +316,7 @@ export default {
     + 'file, anche quando scarica una selezione.',
   'settings.dl_folder': 'Cartella: {name}',
   'settings.dl_no_folder': 'Nessuna cartella scelta — i download finiscono dove li '
-    + 'colloca il browser',
+    + 'colloca il browser, e non si possono sospendere',
   'settings.dl_choose': 'Scegli una cartella',
   'settings.dl_change': 'Cambia',
   'settings.dl_forget': 'Dimentica',
@@ -573,6 +577,24 @@ export default {
   'transfers.open': 'Apri',
   'transfers.done': 'Completato',
   'transfers.cancelled': 'Annullato',
+  'transfers.preparing': 'Preparazione…',
+  'transfers.waiting_own_slots': 'In attesa — i suoi posti sono occupati',
+  'transfers.waiting_node': 'In attesa — {n} prima',
+  'transfers.summary': '{running} in corso · {waiting} in attesa',
+  'transfers.group_running': 'In corso',
+  'transfers.group_waiting': 'In attesa',
+  'transfers.group_paused': 'In pausa',
+  'transfers.group_finished': 'Completati',
+  'transfers.cancel_one': 'Annulla {name}',
+  'transfers.pause': 'Sospendi',
+  'transfers.resume': 'Riprendi',
+  'transfers.paused': 'In pausa',
+  'transfers.not_pausable': 'Non si può sospendere — scelga una cartella di download nelle Impostazioni',
+  'transfers.pause_one': 'Sospendi {name}',
+  'transfers.resume_one': 'Riprendi {name}',
+  'transfers.eta_seconds': '{n} s rimanenti',
+  'transfers.eta_minutes': '{n} min rimanenti',
+  'transfers.eta_hours': '{n} h rimanenti',
   'transfers.failed': 'Non riuscito',
   'group.select': 'Seleziona',
   'group.select_done': 'Fine',
@@ -734,6 +756,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Download simultanei massimi',
+  'node.setting_max_uploads': 'Caricamenti simultanei massimi',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
index 20c5fd1..a02e058 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
@@ -159,6 +159,8 @@ export default {
   'group.mkdir': '新しいフォルダー',
   'group.mkdir_prompt': '新しいフォルダー名',
   'group.mkdir_offline': 'ノードに接続していません。',
+  'group.download_offline': 'ノードに接続していません — ダウンロードを開始できません。再接続は自動で行われます。少し待って再試行してください。',
+  'group.download_write_stalled': 'ファイルのディスクへの書き込みが止まりました（{seconds} 秒間進みません）。ぶら下がったままにせず中止しました。もう一度お試しください。',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -212,6 +214,8 @@ export default {
   'video.close': '閉じる（Esc）',
   'preview.pdf_fallback': 'このブラウザーはページ内に PDF を表示しません。'
     + 'ダウンロードしてご覧ください。いずれにせよ復号はここで行われています。',
+  'preview.too_large': 'このファイルは {size} で、このページがメモリに保持できる上限（{limit}）を超えています。代わりにダウンロードしてください。ダウンロードはディスクに直接書き込まれます。',
+  'download.too_large_for_memory': '「{name}」は {size} です。このブラウザーでこの大きさのファイルを保存するにはディスクへ逐次書き出すしかありませんが、ここではそれができません — ファイル全体をメモリに保持することになります。ページを再読み込みしてもう一度お試しください。解決しない場合はデスクトップアプリをお使いください。',
   'group.upload_indexing': 'インデックスを作成中…',
   'video.err_transport': 'トランスポートが接続されていません',
   'video.err_mse': 'ストリーミング再生に対応していないコーデックです：{codec}',
@@ -309,7 +313,7 @@ export default {
     + 'まとめてダウンロードする場合も 1 ファイルにつき 1 回です。',
   'settings.dl_folder': 'フォルダー：{name}',
   'settings.dl_no_folder': 'フォルダーが選ばれていません。ダウンロードは'
-    + 'ブラウザーが決めた場所に保存されます',
+    + 'ブラウザーが決めた場所に保存され、一時停止できません',
   'settings.dl_choose': 'フォルダーを選択',
   'settings.dl_change': '変更',
   'settings.dl_forget': '解除',
@@ -565,6 +569,24 @@ export default {
   'transfers.open': '開く',
   'transfers.done': '完了',
   'transfers.cancelled': 'キャンセル済み',
+  'transfers.preparing': '準備中…',
+  'transfers.waiting_own_slots': '待機中 — 自分の枠がすべて使用中です',
+  'transfers.waiting_node': '待機中 — 前に {n} 件',
+  'transfers.summary': '実行中 {running} · 待機中 {waiting}',
+  'transfers.group_running': '実行中',
+  'transfers.group_waiting': '待機中',
+  'transfers.group_paused': '一時停止中',
+  'transfers.group_finished': '完了',
+  'transfers.cancel_one': '{name} をキャンセル',
+  'transfers.pause': '一時停止',
+  'transfers.resume': '再開',
+  'transfers.paused': '一時停止中',
+  'transfers.not_pausable': '一時停止できません。設定でダウンロードフォルダーを選ぶと使えます',
+  'transfers.pause_one': '{name} を一時停止',
+  'transfers.resume_one': '{name} を再開',
+  'transfers.eta_seconds': '残り {n} 秒',
+  'transfers.eta_minutes': '残り {n} 分',
+  'transfers.eta_hours': '残り {n} 時間',
   'transfers.failed': '失敗',
   'group.select': '選択',
   'group.select_done': '完了',
@@ -722,6 +744,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': '同時ダウンロードの上限',
+  'node.setting_max_uploads': '同時アップロードの上限',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
index 4b992ae..0235d8a 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
@@ -162,6 +162,8 @@ export default {
   'group.mkdir': 'Nieuwe map',
   'group.mkdir_prompt': 'Naam van de nieuwe map',
   'group.mkdir_offline': 'Niet verbonden met de node.',
+  'group.download_offline': 'Geen verbinding met de node — de download kan niet starten. Er wordt automatisch opnieuw verbonden; probeer het zo weer.',
+  'group.download_write_stalled': 'Het bestand wordt niet meer naar schijf geschreven ({seconds} s zonder voortgang). De download is gestopt in plaats van te blijven hangen; probeer het opnieuw.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -216,6 +218,8 @@ export default {
   'video.close': 'Sluiten (Esc)',
   'preview.pdf_fallback': 'Deze browser toont de PDF niet in de pagina zelf. Download '
     + 'hem in plaats daarvan — ontsleuteld werd hij hoe dan ook hier.',
+  'preview.too_large': 'Dit bestand is {size}, meer dan deze pagina in het geheugen kan houden ({limit}). Download het in plaats daarvan — een download wordt rechtstreeks naar schijf geschreven.',
+  'download.too_large_for_memory': '“{name}” is {size}. Deze browser kan een bestand van die omvang alleen opslaan door het meteen naar schijf te schrijven, en dat kan hier niet — het hele bestand zou in het geheugen moeten. Herlaad de pagina en probeer het opnieuw; als dat niet helpt, gebruik dan de desktop-app.',
   'group.upload_indexing': 'indexeren…',
   'video.err_transport': 'Transport niet verbonden',
   'video.err_mse': 'Codec wordt niet ondersteund voor streamen: {codec}',
@@ -313,7 +317,7 @@ export default {
     + 'ook wanneer u een selectie downloadt.',
   'settings.dl_folder': 'Map: {name}',
   'settings.dl_no_folder': 'Geen map gekozen — downloads komen terecht waar uw browser '
-    + 'ze neerzet',
+    + 'ze neerzet, en ze kunnen niet worden gepauzeerd',
   'settings.dl_choose': 'Map kiezen',
   'settings.dl_change': 'Wijzigen',
   'settings.dl_forget': 'Vergeten',
@@ -574,6 +578,24 @@ export default {
   'transfers.open': 'Openen',
   'transfers.done': 'Voltooid',
   'transfers.cancelled': 'Geannuleerd',
+  'transfers.preparing': 'Voorbereiden…',
+  'transfers.waiting_own_slots': 'Wacht — uw plaatsen zijn bezet',
+  'transfers.waiting_node': 'Wacht — {n} ervoor',
+  'transfers.summary': '{running} bezig · {waiting} wachtend',
+  'transfers.group_running': 'Bezig',
+  'transfers.group_waiting': 'Wachtend',
+  'transfers.group_paused': 'Gepauzeerd',
+  'transfers.group_finished': 'Voltooid',
+  'transfers.cancel_one': '{name} annuleren',
+  'transfers.pause': 'Pauzeren',
+  'transfers.resume': 'Hervatten',
+  'transfers.paused': 'Gepauzeerd',
+  'transfers.not_pausable': 'Kan niet worden gepauzeerd — kies een downloadmap in Instellingen',
+  'transfers.pause_one': '{name} pauzeren',
+  'transfers.resume_one': '{name} hervatten',
+  'transfers.eta_seconds': 'nog {n} s',
+  'transfers.eta_minutes': 'nog {n} min',
+  'transfers.eta_hours': 'nog {n} u',
   'transfers.failed': 'Mislukt',
   'group.select': 'Selecteren',
   'group.select_done': 'Klaar',
@@ -736,6 +758,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Max. gelijktijdige downloads',
+  'node.setting_max_uploads': 'Max. gelijktijdige uploads',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
index 5389220..af4a5bb 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
@@ -165,6 +165,8 @@ export default {
   'group.mkdir': 'Nowy folder',
   'group.mkdir_prompt': 'Nazwa nowego folderu',
   'group.mkdir_offline': 'Brak połączenia z węzłem.',
+  'group.download_offline': 'Brak połączenia z węzłem — pobieranie nie może się rozpocząć. Połączenie wróci samo; proszę spróbować za chwilę.',
+  'group.download_write_stalled': 'Plik przestał być zapisywany na dysk ({seconds} s bez postępu). Pobieranie zostało przerwane, zamiast wisieć w nieskończoność; proszę spróbować ponownie.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -221,6 +223,8 @@ export default {
   'video.close': 'Zamknij (Esc)',
   'preview.pdf_fallback': 'Ta przeglądarka nie wyświetli pliku PDF na stronie. Proszę '
     + 'go pobrać — i tak został odszyfrowany tutaj.',
+  'preview.too_large': 'Ten plik ma {size}, więcej niż ta strona może utrzymać w pamięci ({limit}). Proszę go zamiast tego pobrać — pobieranie jest zapisywane wprost na dysk.',
+  'download.too_large_for_memory': '„{name}” ma {size}. Ta przeglądarka może zapisać plik tej wielkości tylko strumieniowo na dysk, a tutaj nie ma takiej możliwości — musiałaby utrzymać cały plik w pamięci. Proszę odświeżyć stronę i spróbować ponownie; jeśli to nie pomoże, proszę użyć aplikacji desktopowej.',
   'group.upload_indexing': 'indeksowanie…',
   'video.err_transport': 'Transport nie jest połączony',
   'video.err_mse': 'Kodek nieobsługiwany przy odtwarzaniu strumieniowym: {codec}',
@@ -324,7 +328,7 @@ export default {
     + 'także przy pobieraniu zaznaczonych pozycji.',
   'settings.dl_folder': 'Folder: {name}',
   'settings.dl_no_folder': 'Nie wybrano folderu — pobrane pliki trafiają tam, gdzie '
-    + 'umieszcza je przeglądarka',
+    + 'umieszcza je przeglądarka, i nie można ich wstrzymać',
   'settings.dl_choose': 'Wybierz folder',
   'settings.dl_change': 'Zmień',
   'settings.dl_forget': 'Zapomnij',
@@ -586,6 +590,24 @@ export default {
   'transfers.open': 'Otwórz',
   'transfers.done': 'Zakończony',
   'transfers.cancelled': 'Anulowany',
+  'transfers.preparing': 'Przygotowywanie…',
+  'transfers.waiting_own_slots': 'Oczekiwanie — Twoje miejsca są zajęte',
+  'transfers.waiting_node': 'Oczekiwanie — {n} przed',
+  'transfers.summary': '{running} w toku · {waiting} oczekuje',
+  'transfers.group_running': 'W toku',
+  'transfers.group_waiting': 'Oczekuje',
+  'transfers.group_paused': 'Wstrzymane',
+  'transfers.group_finished': 'Zakończone',
+  'transfers.cancel_one': 'Anuluj {name}',
+  'transfers.pause': 'Wstrzymaj',
+  'transfers.resume': 'Wznów',
+  'transfers.paused': 'Wstrzymano',
+  'transfers.not_pausable': 'Nie można wstrzymać — proszę wybrać folder pobierania w Ustawieniach',
+  'transfers.pause_one': 'Wstrzymaj {name}',
+  'transfers.resume_one': 'Wznów {name}',
+  'transfers.eta_seconds': 'pozostało {n} s',
+  'transfers.eta_minutes': 'pozostało {n} min',
+  'transfers.eta_hours': 'pozostało {n} godz.',
   'transfers.failed': 'Nie powiódł się',
   'group.select': 'Zaznacz',
   'group.select_done': 'Gotowe',
@@ -754,6 +776,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Maks. równoczesnych pobierań',
+  'node.setting_max_uploads': 'Maks. równoczesnych wysyłek',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
index d72a6e7..f179c6f 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pt-BR.js
@@ -162,6 +162,8 @@ export default {
   'group.mkdir': 'Nova pasta',
   'group.mkdir_prompt': 'Nome da nova pasta',
   'group.mkdir_offline': 'Sem conexão com o nó.',
+  'group.download_offline': 'Sem conexão com o nó — o download não pode começar. Ele reconecta sozinho; tente de novo em instantes.',
+  'group.download_write_stalled': 'O arquivo parou de ser gravado no disco ({seconds}s sem progresso). O download foi interrompido em vez de ficar travado; tente de novo.',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -216,6 +218,8 @@ export default {
   'video.close': 'Fechar (Esc)',
   'preview.pdf_fallback': 'Este navegador não exibirá o PDF na própria página. Baixe '
     + 'o arquivo — de todo modo ele foi descriptografado aqui.',
+  'preview.too_large': 'Este arquivo tem {size}, mais do que esta página consegue manter na memória ({limit}). Baixe-o em vez disso — um download é gravado direto no disco.',
+  'download.too_large_for_memory': '"{name}" tem {size}. Este navegador só consegue salvar um arquivo desse tamanho gravando-o direto no disco, e aqui ele não tem como — precisaria manter o arquivo inteiro na memória. Recarregue a página e tente novamente; se não resolver, use o aplicativo para computador.',
   'group.upload_indexing': 'indexando…',
   'video.err_transport': 'Transporte não conectado',
   'video.err_mse': 'Codec sem suporte para transmissão: {codec}',
@@ -313,7 +317,7 @@ export default {
     + 'arquivo, inclusive quando você baixa uma seleção.',
   'settings.dl_folder': 'Pasta: {name}',
   'settings.dl_no_folder': 'Nenhuma pasta escolhida — os downloads vão para onde o '
-    + 'seu navegador os colocar',
+    + 'seu navegador os colocar, e não podem ser pausados',
   'settings.dl_choose': 'Escolher pasta',
   'settings.dl_change': 'Alterar',
   'settings.dl_forget': 'Esquecer',
@@ -572,6 +576,24 @@ export default {
   'transfers.open': 'Abrir',
   'transfers.done': 'Concluída',
   'transfers.cancelled': 'Cancelada',
+  'transfers.preparing': 'Preparando…',
+  'transfers.waiting_own_slots': 'Aguardando — seus espaços estão ocupados',
+  'transfers.waiting_node': 'Aguardando — {n} na frente',
+  'transfers.summary': '{running} em andamento · {waiting} aguardando',
+  'transfers.group_running': 'Em andamento',
+  'transfers.group_waiting': 'Aguardando',
+  'transfers.group_paused': 'Pausados',
+  'transfers.group_finished': 'Concluídos',
+  'transfers.cancel_one': 'Cancelar {name}',
+  'transfers.pause': 'Pausar',
+  'transfers.resume': 'Retomar',
+  'transfers.paused': 'Pausado',
+  'transfers.not_pausable': 'Não pode ser pausado — escolha uma pasta de downloads em Configurações',
+  'transfers.pause_one': 'Pausar {name}',
+  'transfers.resume_one': 'Retomar {name}',
+  'transfers.eta_seconds': 'faltam {n} s',
+  'transfers.eta_minutes': 'faltam {n} min',
+  'transfers.eta_hours': 'faltam {n} h',
   'transfers.failed': 'Falhou',
   'group.select': 'Selecionar',
   'group.select_done': 'Concluir',
@@ -733,6 +755,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': 'Máximo de downloads simultâneos',
+  'node.setting_max_uploads': 'Máximo de envios simultâneos',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',
diff --git a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
index c672a13..c89bbdc 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/zh-CN.js
@@ -158,6 +158,8 @@ export default {
   'group.mkdir': '新建文件夹',
   'group.mkdir_prompt': '新文件夹名称',
   'group.mkdir_offline': '未连接到节点。',
+  'group.download_offline': '未连接到节点 — 无法开始下载。连接会自动恢复，请稍后重试。',
+  'group.download_write_stalled': '文件停止写入磁盘（{seconds} 秒无进展）。已中止下载而不是让它一直卡住，请重试。',
   'device.add_title': 'This browser is not linked to this node yet',
   'device.add_hint': 'Your account is known here, but this browser holds a different key. Approve it from a device already linked — no operator needed.',
   'device.add_btn': 'Get a linking code',
@@ -209,6 +211,8 @@ export default {
   'video.from_start': "从头开始播放",
   'video.close': '关闭（Esc）',
   'preview.pdf_fallback': '此浏览器不会在页面内显示该 PDF。请改为下载——无论如何它都已在本地解密。',
+  'preview.too_large': '该文件为 {size}，超出本页面可在内存中保存的上限（{limit}）。请改为下载——下载会直接写入磁盘。',
+  'download.too_large_for_memory': '“{name}”为 {size}。此浏览器只能通过边下边写入磁盘来保存这么大的文件，而这里无法做到——它将不得不把整个文件放在内存中。请重新加载页面后重试；如果仍然无效，请使用桌面应用。',
   'group.upload_indexing': '建立索引中…',
   'video.err_transport': '传输未连接',
   'video.err_mse': '该编解码器不支持流式播放：{codec}',
@@ -305,7 +309,7 @@ export default {
   'settings.dl_ask_hint': '每个文件弹出一次“另存为”对话框——每个文件一次，'
     + '批量下载时也是如此。',
   'settings.dl_folder': '文件夹：{name}',
-  'settings.dl_no_folder': '未选择文件夹——下载内容会保存到浏览器指定的位置',
+  'settings.dl_no_folder': '未选择文件夹——下载内容会保存到浏览器指定的位置，且无法暂停',
   'settings.dl_choose': '选择文件夹',
   'settings.dl_change': '更改',
   'settings.dl_forget': '忘记',
@@ -553,6 +557,24 @@ export default {
   'transfers.open': '打开',
   'transfers.done': '已完成',
   'transfers.cancelled': '已取消',
+  'transfers.preparing': '准备中…',
+  'transfers.waiting_own_slots': '等待中 — 您的通道已占满',
+  'transfers.waiting_node': '等待中 — 前面还有 {n} 个',
+  'transfers.summary': '进行中 {running} · 等待中 {waiting}',
+  'transfers.group_running': '进行中',
+  'transfers.group_waiting': '等待中',
+  'transfers.group_paused': '已暂停',
+  'transfers.group_finished': '已完成',
+  'transfers.cancel_one': '取消 {name}',
+  'transfers.pause': '暂停',
+  'transfers.resume': '继续',
+  'transfers.paused': '已暂停',
+  'transfers.not_pausable': '无法暂停——请在设置中选择下载文件夹以启用',
+  'transfers.pause_one': '暂停 {name}',
+  'transfers.resume_one': '继续 {name}',
+  'transfers.eta_seconds': '剩余 {n} 秒',
+  'transfers.eta_minutes': '剩余 {n} 分钟',
+  'transfers.eta_hours': '剩余 {n} 小时',
   'transfers.failed': '失败',
   'group.select': '选择',
   'group.select_done': '完成',
@@ -709,6 +731,8 @@ export default {
   'node.setting_pair_ttl': 'Pairing code TTL',
   'node.setting_device_ttl': 'Device request TTL',
   'node.setting_max_streams': 'Max concurrent streams',
+  'node.setting_max_downloads': '最大同时下载数',
+  'node.setting_max_uploads': '最大同时上传数',
   'node.setting_transcode': 'Transcode incompatible video',
   'node.setting_unit_hours': 'hours',
   'node.setting_unit_minutes': 'min',