Add keyboard shortcut for toggling word wrap in code viewer

[kanweiwei]

The code viewer has a word wrap toggle but no keyboard shortcut. Adding one would improve the editing experience.

What to do:

1. Read web/src/components/workspace/KeyboardShortcutsHelp.tsx to understand the shortcuts system
2. Read web/src/hooks/useKeyboardShortcuts.ts to understand how shortcuts are registered
3. Find the word wrap toggle logic (likely in workspace settings or display settings)
4. Add a keyboard shortcut (e.g., Alt+Z which is standard in editors)
5. Update the shortcuts help panel to show the new shortcut
6. Update the i18n strings if needed

Skills needed: React, TypeScript, understanding of keyboard event handling

Estimated time: 1-2 hours

[snakefood3232]

I'll add an Alt+Z shortcut for toggling word wrap in the code viewer. I'd handle this by extending the useKeyboardShortcuts hook and updating the shortcuts help component. Can have a PR up in a few hours—I've implemented similar editor shortcut systems in TypeScript/React codebases before.