fix: don't reset settings TUI menu cursor on back (#198)

## Description

Related: #181

## Type of Change

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- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [ ] Test updates

## Related Issues

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Closes #

## Changes Made

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## Testing

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- [ ] I have tested locally
- [ ] I have added/updated tests
- [ ] All existing tests pass

## Checklist

- [ ] My code follows the code style of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published

## Screenshots (if applicable)

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## Additional Notes

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Author: jason-rl

src/components/SettingsMenu.tsx

@@ -5,6 +5,7 @@ import { Breadcrumb } from "./Breadcrumb.js";
 import { NavigationTips } from "./NavigationTips.js";
 import { colors } from "../utils/theme.js";
 import { useExitOnCtrlC } from "../hooks/useExitOnCtrlC.js";
+import { useMenuStore } from "../store/menuStore.js";
 
 interface SettingsMenuItem {
   key: string;
@@ -52,8 +53,26 @@ interface SettingsMenuProps {
 
 export const SettingsMenu = ({ onSelect, onBack }: SettingsMenuProps) => {
   const { exit } = useApp();
-  const [selectedIndex, setSelectedIndex] = React.useState(0);
   const { stdout } = useStdout();
+  const { settingsSelectedKey, setSettingsSelectedKey } = useMenuStore();
+
+  // Calculate initial index from persisted key
+  const initialIndex = React.useMemo(() => {
+    const index = settingsMenuItems.findIndex(
+      (item) => item.key === settingsSelectedKey,
+    );
+    return index >= 0 ? index : 0;
+  }, [settingsSelectedKey]);
+
+  const [selectedIndex, setSelectedIndex] = React.useState(initialIndex);
+
+  // Persist selection when it changes
+  React.useEffect(() => {
+    const currentKey = settingsMenuItems[selectedIndex]?.key;
+    if (currentKey && currentKey !== settingsSelectedKey) {
+      setSettingsSelectedKey(currentKey);
+    }
+  }, [selectedIndex, settingsSelectedKey, setSettingsSelectedKey]);
 
   // Get terminal dimensions for responsive layout
   const getTerminalDimensions = React.useCallback(() => {

src/store/menuStore.ts

@@ -3,9 +3,13 @@ import { create } from "zustand";
 interface MenuState {
   selectedKey: string;
   setSelectedKey: (key: string) => void;
+  settingsSelectedKey: string;
+  setSettingsSelectedKey: (key: string) => void;
 }
 
 export const useMenuStore = create<MenuState>((set) => ({
   selectedKey: "devboxes",
   setSelectedKey: (key) => set({ selectedKey: key }),
+  settingsSelectedKey: "network-policies",
+  setSettingsSelectedKey: (key) => set({ settingsSelectedKey: key }),
 }));