bug: Tooltip shows trailing space for formatters without keyboard shortcut #1280

Description

Template literal always inserts a space between item.name and the shortcut expression, even when shortcut is empty string

Steps to reproduce

1. Open packages/react/src/views/ChatInput/ChatInputFormattingToolbar.js around line 219
2. Tooltip text for 'strike', 'code', and 'multiline' renders as 'strike ', 'code ', 'multiline ' (with trailing space) instead of the bare name

Expected behavior

item.shortcut && (${item.shortcut}) evaluates to '' (empty string) when shortcut is '', but the space separator ${...} is unconditionally included in the template literal, producing a trailing space should be handled correctly.

Actual behavior

Tooltip text for 'strike', 'code', and 'multiline' renders as 'strike ', 'code ', 'multiline ' (with trailing space) instead of the bare name