fix: keep chat scrolled to bottom on session switch

CHANGELOG.md

@@ -30,6 +30,7 @@
 - Browser tools: add remote CDP URL support, Linux launcher options (`executablePath`, `noSandbox`), and surface `cdpUrl` in status.
 
 ### Fixes
+- Chat UI: keep the chat scrolled to the latest message after switching sessions.
 - Gateway CLI: read `CLAWDIS_GATEWAY_PASSWORD` from environment in `callGateway()` — allows `doctor`/`health` commands to auth without explicit `--password` flag.
 - Auto-reply: suppress stray `HEARTBEAT_OK` acks so they never get delivered as messages.
 - Discord: include recent guild context when replying to mentions and add `discord.historyLimit` to tune how many messages are captured.

apps/shared/ClawdisKit/Sources/ClawdisChatUI/ChatView.swift

@@ -129,6 +129,9 @@ public struct ClawdisChatView: View {
             self.scrollPosition = self.scrollerBottomID
             self.hasPerformedInitialScroll = true
         }
+        .onChange(of: self.viewModel.sessionKey) { _, _ in
+            self.hasPerformedInitialScroll = false
+        }
         .onChange(of: self.viewModel.messages.count) { _, _ in
             guard self.hasPerformedInitialScroll else { return }
             withAnimation(.snappy(duration: 0.22)) {