A group call is N-1 ordinary 1:1 calls, one to each other member, each riding
the pairwise session that member already has — a transport a human already
authenticated by comparing the safety code. No mixer, no SFU, no point at which
two people's media meets anywhere but on a device.
Call control is separate from call media, because the two reach different sets
of people. Who opened a call, who joined and who left travels as group frames
signed with the sender's group identity key, so it reaches members currently
reachable only through a relay — and a relaying member can drop one but cannot
write one. Media flows only where a direct link exists, so a member without one
shows as connecting rather than being omitted. Frames carry a per-sender
sequence checked before the action, so a captured leave cannot end a later call,
and simultaneous calls converge on the lower random call id.
One capture is shared across every leg rather than one getUserMedia per member,
and legs answer without prompting: the flag permitting that is set only locally,
only while this user is in the call, and cleared when they leave.
UI: a gallery that sizes itself from the space it has, a spotlight view, an
active-speaker indicator read from the waveform, and the call surface in the
same visual language as the 1:1 one.
Also in this commit, the v6.5.0 language-suggestion work that had not been
pushed yet; its notes are in the changelog. And two fixes: the safety-code input
asks for digits rather than text, and starting a new chat from inside a group no
longer creates it behind the group where it cannot be seen — which had made it
impossible to connect to anyone new, or to add anyone to a group, while a group
was open.
Claude-Session: https://claude.ai/code/session_01XSxAkET3hQTkYDQfbjCQwZ
The chat did not lay out correctly on phones, iPhone worst of all: the header
would not stay at the top, and the layout shifted as you scrolled or opened the
keyboard.
The root cause was a floor, not a position. The app shell and column both carry
.minimal-bg, which sets min-height:100vh — and min-height always beats height. On
iOS 100vh is the URL-bar-retracted *large* viewport, so with the bar showing the
shell was held some 60-100px taller than the visible area. That surplus made the
document scrollable, and a scrolling document is how the header rode off the top.
It also left the visual-viewport tracking inert: forcing --sb-vh to 700px left the
shell at 844px. With the floor removed it follows to 700px and the document does
not scroll.
Also: the app shell is now sized from visualViewport rather than pinned, the
message list is the only scroller and can actually shrink, safe-area padding
applies (viewport-fit=cover) and collapses under the keyboard, and the
online/offline toast no longer sits on top of the header.
Adds ?preview=chat, which renders the chat layout with canned content and no
connection — presentational only, no peer manager, keys, or network.
Verified in an emulated iPhone viewport at rest and with the keyboard open:
header pinned at 0-64, composer flush to the keyboard line, document unscrollable.
lockbitchat