v0.5.178

What's new

Composer chips are properly flat. The unified composer card shipped in
0.5.176 still had two chips wearing the old raised-button look — a border and
fill on Interrupt, and a drop shadow on every dropdown (Opus 5, High, Bypass
permissions, Remote control). The shadow came from the app's global button
element rule leaking through, since the chip style zeroed border and background
but never reset box-shadow.

Both are fixed: the whole control row now reads as one flat language, matching
the rest of the card. Interrupt keeps its red — just the colour, not the box.

Full Changelog: v0.5.177...v0.5.178