feat(ui): session nav follows visible list

Cmd+Shift+[ and Cmd+Shift+] now cycle through visible sessions only (parents + expanded children) and no longer include Instance Info. Sidebar session list auto-scrolls to keep the active session row in view.

packages/ui/src/stores/sessions.ts

@@ -9,6 +9,7 @@ import {
   clearActiveParentSession,
   clearInstanceDraftPrompts,
   clearSessionDraftPrompt,
+  ensureSessionParentExpanded,
   getActiveParentSession,
   getActiveSession,
   getChildSessions,
@@ -18,17 +19,22 @@ import {
   getSessionInfo,
   getSessionThreads,
   getSessions,
+  getVisibleSessionIds,
   isSessionBusy,
   isSessionMessagesLoading,
+  isSessionParentExpanded,
   loading,
   providers,
   sessionInfoByInstance,
   sessions,
   setActiveParentSession,
   setActiveSession,
+  setActiveSessionFromList,
   setSessionDraftPrompt,
+  setSessionParentExpanded,
   setSessionStatus,
- } from "./session-state"
+  toggleSessionParentExpanded,
+} from "./session-state"
 
 import { getDefaultModel } from "./session-models"
 import {
@@ -86,6 +92,7 @@ export {
   clearSessionDraftPrompt,
   createSession,
   deleteSession,
+  ensureSessionParentExpanded,
   executeCustomCommand,
   renameSession,
   runShellCommand,
@@ -103,8 +110,10 @@ export {
   getSessionInfo,
   getSessionThreads,
   getSessions,
+  getVisibleSessionIds,
   isSessionBusy,
   isSessionMessagesLoading,
+  isSessionParentExpanded,
   loadMessages,
   loading,
   providers,
@@ -113,8 +122,11 @@ export {
   sessions,
   setActiveParentSession,
   setActiveSession,
+  setActiveSessionFromList,
   setSessionDraftPrompt,
+  setSessionParentExpanded,
   setSessionStatus,
+  toggleSessionParentExpanded,
   updateSessionAgent,
   updateSessionModel,
 }