Three related UX fixes on the client.
1. Participants count on profile
DMs always have exactly two participants (you and the contact) so a
"Участников: 1" row was confusing — either it's obviously the other
person or it's wrong depending on how you count. Removed for direct
conversations; the row still appears for group chats (and shows an
em-dash until v2.1.0 gives groups a real member list).
2. Dev feed seed now activates on network / 404 errors
The seed was only surfaced when the real API returned an EMPTY
array. If the node was down (Network request failed) or the endpoint
replied 404, the catch block quietly set posts to [] and the list
stayed blank — defeating the point of the seed. Now both the empty-
response path AND the network-error path fall back to getDevSeedFeed(),
so scrolling / like-toggling works even without a running node.
Also made the __DEV__ lookup more defensive: use `globalThis.__DEV__`
at runtime instead of the typed global. Some bundler configurations
have the TS type but not the runtime binding, or vice-versa — the
runtime lookup always agrees with Metro.
3. Back from profile → previous screen instead of tab root
Root cause: AnimatedSlot rendered <Slot>, which is stack-less. When
/chats/xyz pushed /profile/abc (cross-group), the chats group
unmounted. Hitting Back then re-entered chats at its root (/chats
list) rather than /chats/xyz.
Replaced <Slot> with <Stack> in AnimatedSlot. Tab switching still
stays flat because NavBar uses router.replace (which maps to
navigation.replace on the Stack — no history accumulation).
Cross-group pushes (post author tap from feed, avatar tap from chat
header, compose modal) now live in the outer Stack's history, so
Back pops correctly to the caller.
The nested Stacks (chats/_layout.tsx, feed/_layout.tsx,
profile/_layout.tsx) still handle intra-group navigation as before.
The PanResponder-based swipe-right-to-back was removed since the
native Stack now provides iOS edge-swipe natively; Android uses the
system back button.
animation: 'none' keeps the visual swap instant — matches the prior
Slot look so nothing flashes slide-animations that weren't there
before. Sub-group layouts can opt into slide_from_right themselves
(profile/_layout.tsx and feed/_layout.tsx already do).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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