feat(app): refine desktop v2 home and session controls (#28788)

packages/app/src/pages/session/use-session-commands.tsx

@@ -20,6 +20,8 @@ import { extractPromptFromParts } from "@/utils/prompt"
 import { UserMessage } from "@opencode-ai/sdk/v2"
 import { useSessionLayout } from "@/pages/session/session-layout"
 
+const USE_DESKTOP_V2 = import.meta.env.VITE_OPENCODE_CHANNEL !== "prod"
+
 export type SessionCommandContext = {
   navigateMessageByOffset: (offset: number) => void
   setActiveMessage: (message: UserMessage | undefined) => void
@@ -70,10 +72,8 @@ export const useSessionCommands = (actions: SessionCommandContext) => {
   })
   const activeFileTab = tabState.activeFileTab
   const closableTab = tabState.closableTab
-  const shown = () =>
-    platform.platform !== "desktop" ||
-    import.meta.env.VITE_OPENCODE_CHANNEL !== "beta" ||
-    settings.general.showFileTree()
+  const desktopV2 = () => platform.platform === "desktop" && USE_DESKTOP_V2
+  const shown = () => (desktopV2() ? settings.general.showFileTree() : true)
 
   const messages = () => {
     const id = params.id