Mobile: slash-command typeahead parity with CLI

Feature request

On mobile, typing / doesn't show a typeahead list of available slash commands. The desktop CLI does this — see screenshot below from CLI:

> /pla█
/plan
/flow:plan
/flow:plan
/ultraplan
/plugin
/batch

Mobile (claude.ai/code via phone browser) just submits whatever I type after / as if it were prose. No autocomplete, no list of available skills.

Why it matters

Heavy users on the road accumulate dozens of skills (especially with plugins). Discovering / typo-correcting slash commands without a typeahead is rough on a phone keyboard. Parity with the desktop CLI's behavior would close the gap.

Suggested behavior

Match the CLI exactly: as soon as the input starts with /, drop a dropdown listing matching skills filtered by what's typed. Tap to select. Existing CLI surface — mobile should reuse the same backend.

Environment

• Surface: claude.ai/code on iOS Safari (also seen on the official mobile app if it exists)
• Versus: desktop Claude Code CLI on macOS, where typeahead works as shown