diff --git a/packages/app/src/app.tsx b/packages/app/src/app.tsx
index f4cf14518c..b7f87a09cd 100644
--- a/packages/app/src/app.tsx
+++ b/packages/app/src/app.tsx
@@ -9,7 +9,7 @@ import { Font } from "@opencode-ai/ui/font"
 import { Splash } from "@opencode-ai/ui/logo"
 import { ThemeProvider } from "@opencode-ai/ui/theme/context"
 import { MetaProvider } from "@solidjs/meta"
-import { type BaseRouterProps, Navigate, Route, Router, useParams, useSearchParams } from "@solidjs/router"
+import { type BaseRouterProps, Navigate, Route, Router, useNavigate, useParams, useSearchParams } from "@solidjs/router"
 import { QueryClient, QueryClientProvider } from "@tanstack/solid-query"
 import { Effect } from "effect"
 import {
@@ -32,7 +32,7 @@ import { CommandProvider, useCommand, type CommandOption } from "@/context/comma
 import { CommentsProvider } from "@/context/comments"
 import { FileProvider } from "@/context/file"
 import { ServerSDKProvider } from "@/context/server-sdk"
-import { ServerSyncProvider } from "@/context/server-sync"
+import { ServerSyncProvider, useServerSync } from "@/context/server-sync"
 import { GlobalProvider, useGlobal } from "@/context/global"
 import { HighlightsProvider } from "@/context/highlights"
 import { LanguageProvider, type Locale, useLanguage } from "@/context/language"
@@ -52,9 +52,10 @@ import LegacyLayout from "@/pages/layout"
 import NewLayout from "@/pages/layout-new"
 import { ErrorPage } from "./pages/error"
 import { useCheckServerHealth } from "./utils/server-health"
-import { legacySessionServer, requireServerKey, sessionHref } from "./utils/session-route"
+import { legacySessionHref, legacySessionServer, requireServerKey, sessionHref } from "./utils/session-route"
+import { createSessionLineage } from "@/pages/session/session-lineage"
 
-import { SessionPage, TargetSessionRouteContent } from "@/pages/session"
+import { SessionPage, SessionRouteErrorBoundary, TargetSessionRouteContent } from "@/pages/session"
 import { NewHome, LegacyHome } from "@/pages/home"
 
 const NewSession = lazy(() => import("@/pages/new-session"))
@@ -88,10 +89,14 @@ const SessionRoute = () => {
     tabs.newDraft({ server: server.key, directory: sdk().directory }, search.prompt)
   })
 
-  return <SessionPage />
+  return (
+    <SessionRouteErrorBoundary sessionID={params.id}>
+      <SessionPage />
+    </SessionRouteErrorBoundary>
+  )
 }
 
-const TargetSessionRoute = () => {
+function TargetServerRoute(props: ParentProps) {
   const params = useParams<{ serverKey: string; id: string }>()
   const global = useGlobal()
   const conn = createMemo(() => {
@@ -105,14 +110,47 @@ const TargetSessionRoute = () => {
     // re-resolves reactively instead); both rely on this key for server changes.
     <Show when={requireServerKey(params.serverKey)} keyed>
       <ServerSDKProvider server={conn}>
-        <ServerSyncProvider server={conn}>
-          <TargetSessionRouteContent />
-        </ServerSyncProvider>
+        <ServerSyncProvider server={conn}>{props.children}</ServerSyncProvider>
       </ServerSDKProvider>
     </Show>
   )
 }
 
+const TargetSessionRoute = () => (
+  <TargetServerRoute>
+    <TargetSessionRouteContent />
+  </TargetServerRoute>
+)
+
+function LegacyTargetSessionRoute() {
+  const params = useParams<{ serverKey: string; id: string }>()
+  return (
+    <TargetServerRoute>
+      <SessionRouteErrorBoundary sessionID={params.id} serverKey={requireServerKey(params.serverKey)}>
+        <LegacyTargetSessionRedirect />
+      </SessionRouteErrorBoundary>
+    </TargetServerRoute>
+  )
+}
+
+function LegacyTargetSessionRedirect() {
+  const params = useParams<{ id: string }>()
+  const navigate = useNavigate()
+  const sync = useServerSync()
+  const current = createSessionLineage(
+    () => params.id,
+    () => sync().session.lineage,
+  )
+
+  createEffect(() => {
+    const directory = current()?.session.directory
+    if (!directory) return
+    navigate(legacySessionHref(directory, params.id), { replace: true })
+  })
+
+  return null
+}
+
 // Wraps the non-draft routes. They are gated on (and keyed to) the globally selected
 // server via ServerKey, then provide the server-scoped shell (Permission/Layout/
 // Notification/Models + the visual Layout) for that server.
@@ -542,7 +580,14 @@ function Routes(props: { serverScoped?: JSX.Element }) {
           <LegacyServerLayout serverScoped={props.serverScoped}>{routeProps.children}</LegacyServerLayout>
         )}
       >
-        <Show when={!settings.general.newLayoutDesigns()}>{<Route path="/" component={LegacyHome} />}</Show>
+        <Show when={!settings.general.newLayoutDesigns()}>
+          {
+            <>
+              <Route path="/" component={LegacyHome} />
+              <Route path="/server/:serverKey/session/:id" component={LegacyTargetSessionRoute} />
+            </>
+          }
+        </Show>
         <Route path="/:dir" component={DirectoryLayout}>
           <Route path="/" component={() => <Navigate href="session" />} />
           <Route path="/session/:id?" component={SessionRoute} />
@@ -550,15 +595,15 @@ function Routes(props: { serverScoped?: JSX.Element }) {
       </Route>
       <Show when={settings.general.newLayoutDesigns()}>
         <Route path="/" component={NewHome} />
-        <Route path="/:dir/session/:id" component={LegacyTargetSessionRoute} />
+        <Route path="/:dir/session/:id" component={NewLayoutLegacySessionRedirect} />
+        <Route path="/server/:serverKey/session/:id" component={TargetSessionRoute} />
       </Show>
       <Route path="/new-session" component={DraftRoute} />
-      <Route path="/server/:serverKey/session/:id" component={TargetSessionRoute} />
     </>
   )
 }
 
-function LegacyTargetSessionRoute() {
+function NewLayoutLegacySessionRedirect() {
   const server = useServer()
   const tabs = useTabs()
   const params = useParams<{ id: string }>()
diff --git a/packages/app/src/pages/home.tsx b/packages/app/src/pages/home.tsx
index 762b8b2c8e..c4d84a96f8 100644
--- a/packages/app/src/pages/home.tsx
+++ b/packages/app/src/pages/home.tsx
@@ -35,7 +35,7 @@ import { usePlatform } from "@/context/platform"
 import { DateTime } from "luxon"
 import { useDialog } from "@opencode-ai/ui/context/dialog"
 import { useDirectoryPicker } from "@/components/directory-picker"
-import { useSettingsCommand } from "@/components/settings-dialog"
+import { useSettingsDialog } from "@/components/settings-dialog"
 import { DialogSelectServer, useServerManagementController } from "@/components/dialog-select-server"
 import { DialogServerV2 } from "@/components/settings-v2/dialog-server-v2"
 import { ServerConnection, serverName, useServer } from "@/context/server"
@@ -267,7 +267,7 @@ export function NewHome() {
   const command = useCommand()
   const notification = useNotification()
   const marked = useMarked()
-  const openSettings = useSettingsCommand()
+  const openSettings = useSettingsDialog()
   let focusSessionSearch: (() => void) | undefined
   const [state, setState] = createStore({
     search: "",
diff --git a/packages/app/src/pages/layout-new.tsx b/packages/app/src/pages/layout-new.tsx
index 329b7c56b0..f73e7b17eb 100644
--- a/packages/app/src/pages/layout-new.tsx
+++ b/packages/app/src/pages/layout-new.tsx
@@ -6,11 +6,13 @@ import { Titlebar, type TitlebarUpdate } from "@/components/titlebar"
 import { usePlatform } from "@/context/platform"
 import { setNavigate } from "@/utils/notification-click"
 import { setV2Toast, ToastRegion } from "@/utils/toast"
+import { useSettingsCommand } from "@/components/settings-dialog"
 
 export default function NewLayout(props: ParentProps) {
   const platform = usePlatform()
   const navigate = useNavigate()
   setNavigate(navigate)
+  useSettingsCommand()
 
   createEffect(() => setV2Toast(true))
 
diff --git a/packages/app/src/pages/new-session.tsx b/packages/app/src/pages/new-session.tsx
index 461be60450..7831ed8514 100644
--- a/packages/app/src/pages/new-session.tsx
+++ b/packages/app/src/pages/new-session.tsx
@@ -6,7 +6,6 @@ import { Tooltip } from "@opencode-ai/ui/tooltip"
 import { NewSessionDesignView } from "@/components/session"
 import { PromptInput } from "@/components/prompt-input"
 import { StatusPopoverV2 } from "@/components/status-popover"
-import { useSettingsCommand } from "@/components/settings-dialog"
 import {
   PromptProjectAddButton,
   PromptProjectSelector,
@@ -45,7 +44,6 @@ export default function NewSessionPage() {
   const [searchParams, setSearchParams] = useSearchParams<{ draftId?: string; prompt?: string }>()
 
   useComposerCommands()
-  useSettingsCommand()
 
   let inputRef: HTMLDivElement | undefined
 
diff --git a/packages/app/src/pages/session.tsx b/packages/app/src/pages/session.tsx
index 46bd907167..84f6b01309 100644
--- a/packages/app/src/pages/session.tsx
+++ b/packages/app/src/pages/session.tsx
@@ -35,7 +35,7 @@ import { previewSelectedLines } from "@opencode-ai/session-ui/pierre/selection-b
 import { Button } from "@opencode-ai/ui/button"
 import { showToast } from "@/utils/toast"
 import { base64Encode, checksum } from "@opencode-ai/core/util/encode"
-import { Navigate, useLocation, useNavigate, useParams, useSearchParams } from "@solidjs/router"
+import { useLocation, useNavigate, useParams, useSearchParams } from "@solidjs/router"
 import { NewSessionView, SessionHeader } from "@/components/session"
 import { ErrorPage } from "@/pages/error"
 import { CommentsProvider, useComments } from "@/context/comments"
@@ -56,7 +56,6 @@ import { useSync } from "@/context/sync"
 import { useTabs } from "@/context/tabs"
 import { TerminalProvider, useTerminal } from "@/context/terminal"
 import { PromptInput } from "@/components/prompt-input"
-import { useSettingsCommand } from "@/components/settings-dialog"
 import { type FollowupDraft, sendFollowupDraft } from "@/components/prompt-input/submit"
 import {
   createPromptInputController,
@@ -153,7 +152,7 @@ export function TargetSessionRouteContent() {
   )
 }
 
-function SessionRouteErrorBoundary(
+export function SessionRouteErrorBoundary(
   props: ParentProps<{ sessionID?: string; serverKey?: ServerConnection.Key; padded?: boolean }>,
 ) {
   const settings = useSettings()
@@ -221,7 +220,6 @@ function SessionErrorFallback(props: { error: unknown; sessionID?: string; serve
 
 function ResolvedTargetSessionRoute() {
   const params = useParams<{ serverKey: string; id: string }>()
-  const settings = useSettings()
   const tabs = useTabs()
   const sync = useServerSync()
   const serverKey = createMemo(() => requireServerKey(params.serverKey))
@@ -248,16 +246,11 @@ function ResolvedTargetSessionRoute() {
           the terminal. Same-workspace tab switches keep it open because warm
           targets resolve synchronously from the sync cache. */}
       <Show when={directory()}>
-        <Show
-          when={settings.general.newLayoutDesigns()}
-          fallback={<Navigate href={legacySessionHref(directory()!, params.id)} />}
-        >
-          <SDKProvider directory={targetDirectory}>
-            <DirectoryDataProvider directory={targetDirectory} server={serverKey}>
-              <TargetSessionPage />
-            </DirectoryDataProvider>
-          </SDKProvider>
-        </Show>
+        <SDKProvider directory={targetDirectory}>
+          <DirectoryDataProvider directory={targetDirectory} server={serverKey}>
+            <TargetSessionPage />
+          </DirectoryDataProvider>
+        </SDKProvider>
       </Show>
     </TargetServerScopedProviders>
   )
@@ -1021,7 +1014,6 @@ export default function Page() {
   }
 
   useComposerCommands()
-  useSettingsCommand()
   useSessionCommands({
     navigateMessageByOffset,
     setActiveMessage,