feat(music): network-adaptive prefetch depth, opt-in keep-screen-on toggle

Prefetch depth (music-player.js): 5 tracks ahead on Wi-Fi, 3 on cellular —
more runway through a screen-lock network gap when the connection is cheap
and fast, less when it's metered. navigator.connection is Chromium-only;
Firefox/Safari (where it's undefined) get the same conservative tier as an
unrecognized connection type, never assumed fast. MAX_CACHED_BLOBS raised
to 6 to hold the largest case (current + 5).

Keep-screen-on-during-audio (new user preference, off by default): a
Settings toggle, backed by a new whitelisted key on
/v1/users/me/preferences (music_keep_screen_on). music-player.js holds a
Screen Wake Lock only while a track is playing and only when the user has
opted in — unlike the video player's unconditional lock, this must not
fight the ordinary expectation (matching Spotify/Deezer) that the phone
locks on its own while listening.

1 files changed, 2 insertions, 0 deletions

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'