🤖 Make title bar version text selectable (#169)

Fixes an issue where users cannot select/copy the git version text in
the title bar.

## Problem
The title bar has `user-select: none` on the container, preventing users
from selecting the version string to copy it for bug reports or
reference.

## Solution
Added `user-select: text` and `cursor: text` to the `TitleText`
component specifically, while keeping `user-select: none` on the
container for other UI elements (like the date).

## Result
Users can now click and drag to select the git version text (e.g.,
`c354df64-dirty`) and copy it.

_Generated with `cmux`_

Author: ammar-agent

src/components/TitleBar.tsx

@@ -20,6 +20,8 @@ const TitleBarContainer = styled.div`
 const TitleText = styled.div`
   font-weight: normal;
   letter-spacing: 0.5px;
+  user-select: text;
+  cursor: text;
 `;
 
 const BuildInfo = styled.div`