Backend returns messages DESC (newest first); the view previously rendered
that directly, so the feed was inverted vs Discord (old at bottom, new at top)
while the load-older control sat at the top — contradictory.
- Reverse the display list so it reads oldest→newest top→bottom, like DC.
- Load-older (cursor to lower created_at) prepends at the top; scroll position
is preserved by offsetting scrollTop by the height added above.
- Open at the bottom (newest visible) on first load / scope change.
- New live messages append at the bottom and auto-scroll only when the user is
already near the bottom (nearBottomRef), so reading history isn't disrupted.
- Scroll container now tracked via ref; onScroll updates nearBottom + triggers
load-older when scrolled to the top.
tsc, biome, next build all clean.
asepharyana
e3dd6a3427