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

1 files changed, 25 insertions, 1 deletions

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',