diff --git a/src/App.tsx b/src/App.tsx
index e4ea3d6a..5f8a4cc7 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1631,8 +1631,6 @@ function MainApp() {
 
   useTabActivationGuard({
     activeTab,
-    activeWorkspace,
-    isPhone,
     isTablet,
     setActiveTab,
   });
diff --git a/src/features/app/hooks/useTabActivationGuard.test.tsx b/src/features/app/hooks/useTabActivationGuard.test.tsx
new file mode 100644
index 00000000..7802d871
--- /dev/null
+++ b/src/features/app/hooks/useTabActivationGuard.test.tsx
@@ -0,0 +1,34 @@
+// @vitest-environment jsdom
+import { renderHook } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+import { useTabActivationGuard } from "./useTabActivationGuard";
+
+describe("useTabActivationGuard", () => {
+  it("does not force home tab on phone when no workspace is selected", () => {
+    const setActiveTab = vi.fn();
+
+    renderHook(() =>
+      useTabActivationGuard({
+        activeTab: "git",
+        isTablet: false,
+        setActiveTab,
+      }),
+    );
+
+    expect(setActiveTab).not.toHaveBeenCalled();
+  });
+
+  it("redirects tablet home tab selection to codex", () => {
+    const setActiveTab = vi.fn();
+
+    renderHook(() =>
+      useTabActivationGuard({
+        activeTab: "home",
+        isTablet: true,
+        setActiveTab,
+      }),
+    );
+
+    expect(setActiveTab).toHaveBeenCalledWith("codex");
+  });
+});
diff --git a/src/features/app/hooks/useTabActivationGuard.ts b/src/features/app/hooks/useTabActivationGuard.ts
index f5299839..55463dd1 100644
--- a/src/features/app/hooks/useTabActivationGuard.ts
+++ b/src/features/app/hooks/useTabActivationGuard.ts
@@ -1,32 +1,18 @@
 import { useEffect } from "react";
-import type { WorkspaceInfo } from "../../../types";
 
 type AppTab = "home" | "projects" | "codex" | "git" | "log";
 
 type UseTabActivationGuardOptions = {
   activeTab: AppTab;
-  activeWorkspace: WorkspaceInfo | null;
-  isPhone: boolean;
   isTablet: boolean;
   setActiveTab: (tab: AppTab) => void;
 };
 
 export function useTabActivationGuard({
   activeTab,
-  activeWorkspace,
-  isPhone,
   isTablet,
   setActiveTab,
 }: UseTabActivationGuardOptions) {
-  useEffect(() => {
-    if (!isPhone) {
-      return;
-    }
-    if (!activeWorkspace && activeTab !== "home" && activeTab !== "projects") {
-      setActiveTab("home");
-    }
-  }, [activeTab, activeWorkspace, isPhone, setActiveTab]);
-
   useEffect(() => {
     if (!isTablet) {
       return;