Merge branch 'debug/webrtc-lock-resume'

WebRTC transport dies silently after an extended mobile screen lock
(confirmed live via client-side trace + node logs): ICE goes
disconnected -> failed within ~10s of each other on both ends, but the
DataChannel's readyState stays "open" throughout, so nothing failed fast —
every request just sat out its own timeout, matching the reported symptom
(poster spinners, blocked chat, dead new streams, stuck music).

- Automatic reconnect on WebRTC "failed": capped exponential backoff,
  redoes the full signaling handshake, wakes immediately on
  visibilitychange instead of waiting out a throttled backoff timer.
- Fixed two real bugs the reconnect work exposed: the signaling POST to
  the hub kept using the token captured at construction, never the fresh
  one fetched per reconnect attempt (401 loop, no possible recovery); and
  connect() re-armed a diagnostic listener/interval on every attempt
  without disposing of the previous one.
- pipelinedDownload retries a lost chunk instead of aborting the whole
  transfer — covers Files downloads, video poster/thumbnail fetches, and
  music-player.js's blob-based track download.
- music-player.js: don't throw "Transport not connected" while a
  reconnect is already landing (waitForReconnect); prefetch depth now
  adapts to network type (5 tracks ahead on Wi-Fi, 3 on cellular or
  unrecognized — Firefox/Safari included, where the detection API is
  simply absent).
- video-player.js: onReconnected reissues the existing seek-to-current-time
  path, so a mid-stream reconnect looks like an ordinary seek rather than
  a dead player; holds a Screen Wake Lock unconditionally while open.
- New opt-in (off by default) user preference: keep the screen on during
  audio playback, for whoever wants to trade battery for sidestepping the
  screen-lock gap entirely — off by default because the ordinary
  expectation (matching Spotify/Deezer) is that the phone locks on its
  own while listening.
- hub: /app and / now serve Cache-Control: no-store — the SPA shell had no
  cache header at all, so a browser that cached it heuristically could
  keep re-serving an old build (old ASSET_V, old JS) through any number of
  reloads or pull-to-refreshes.

Verified against real production use across many rounds (demo groups,
actual mobile screen-lock testing) rather than synthetic reproduction
alone. 430 hub tests + 650 node tests passing throughout.

10 files changed, 20 insertions, 0 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 1e367fb..b12f3f4 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/de.js
@@ -259,6 +259,8 @@ export default {
   'settings.defaults': 'Standardwerte',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Node-Identitäten',
   'settings.node_pins_hint': 'Der Identitätsschlüssel jedes Nodes wird bei der ersten '
     + 'Verbindung gemerkt. Ändert er sich, wird die Verbindung abgelehnt — das ist nur '
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 5aedd7a..54f47e9 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/en.js
@@ -256,6 +256,8 @@ export default {
   'settings.defaults': 'Defaults',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Node identities',
   'settings.node_pins_hint': "Each node's identity key is remembered the first time you connect. If it changes, the connection is refused — that is expected only when an operator reinstalls a node. Verify with them before clearing.",
   'settings.node_pins_count': {
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 46a4638..03d1d62 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/es.js
@@ -257,6 +257,8 @@ export default {
   'settings.defaults': 'Valores predeterminados',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Identidades de los nodes',
   'settings.node_pins_hint': 'La clave de identidad de cada node se memoriza la '
     + 'primera vez que se conecta. Si cambia, la conexión se rechaza — algo esperable '
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 5cd8894..48289d6 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/fr.js
@@ -258,6 +258,8 @@ export default {
   'settings.defaults': 'Valeurs par défaut',
   'settings.default_tab': 'Onglet par défaut',
   'settings.default_tab_hint': 'L\'onglet qui s\'ouvre en premier quand vous entrez dans un groupe.',
+  'settings.music_keep_screen_on': 'Garder l\'écran allumé pendant l\'écoute',
+  'settings.music_keep_screen_on_hint': 'Empêche le téléphone de se verrouiller automatiquement pendant qu\'un morceau joue. Désactivé par défaut — la plupart des gens préfèrent que leur téléphone se verrouille normalement pendant l\'écoute, comme sur Spotify ou Deezer.',
   'settings.node_pins': 'Identités des nodes',
   'settings.node_pins_hint': "La clé d'identité de chaque node est mémorisée lors de "
     + 'la première connexion. Si elle change, la connexion est refusée — ce qui n’est '
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 26e4e8f..f73da13 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/it.js
@@ -258,6 +258,8 @@ export default {
   'settings.defaults': 'Valori predefiniti',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Identità dei node',
   'settings.node_pins_hint': "La chiave d'identità di ogni node viene memorizzata alla "
     + 'prima connessione. Se cambia, la connessione viene rifiutata — cosa che ci si '
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 903a902..0b04cca 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/ja.js
@@ -255,6 +255,8 @@ export default {
   'settings.defaults': 'デフォルト',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'node の識別情報',
   'settings.node_pins_hint': '各 node の識別鍵は、最初に接続したときに記憶されます。'
     + 'それが変わった場合、接続は拒否されます。これが起こるのは、運営者が node を'
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 217aead..ef8a60b 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/nl.js
@@ -259,6 +259,8 @@ export default {
   'settings.defaults': 'Standaardwaarden',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Node-identiteiten',
   'settings.node_pins_hint': 'De identiteitssleutel van elke node wordt bij de eerste '
     + 'verbinding onthouden. Verandert die, dan wordt de verbinding geweigerd — wat '
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 25d67f9..63ef1f7 100644
--- a/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
+++ b/packages/meshbay-hub/src/meshbay_hub/static/locales/pl.js
@@ -270,6 +270,8 @@ export default {
   'settings.defaults': 'Wartości domyślne',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Tożsamości nodes',
   'settings.node_pins_hint': 'Klucz tożsamości każdego node jest zapamiętywany przy '
     + 'pierwszym połączeniu. Jeśli się zmieni, połączenie zostanie odrzucone — czego '
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 c32ff63..71f2829 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
@@ -259,6 +259,8 @@ export default {
   'settings.defaults': 'Padrões',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'Identidades dos nodes',
   'settings.node_pins_hint': 'A chave de identidade de cada node é memorizada na '
     + 'primeira conexão. Se ela mudar, a conexão é recusada — o que só é esperado '
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 ee0efdf..d88817f 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
@@ -251,6 +251,8 @@ export default {
   'settings.defaults': '默认值',
   'settings.default_tab': 'Default tab',
   'settings.default_tab_hint': 'Which tab opens first when you enter a group.',
+  'settings.music_keep_screen_on': 'Keep screen on during music playback',
+  'settings.music_keep_screen_on_hint': 'Prevents the phone from locking on its own while a track is playing. Off by default — most people want their phone to lock normally while listening, like Spotify or Deezer.',
   'settings.node_pins': 'node 身份',
   'settings.node_pins_hint': '每个 node 的身份密钥都会在您首次连接时被记住。'
     + '如果它发生变化，连接会被拒绝——只有当运营者重装 node 时才应如此。'