theme and layout checks T01–T03

The three check frames of §9.4: S03 in Light Modern, S03 in Dark High Contrast, and S02 at 960 × 640.

Figma frame T01 (annotated)

Callouts:

1. S03 in Light Modern: same frame, Theme mode switched
2. Design tab in light tokens

Figma frame T02 (annotated)

Callouts:

1. S03 in Dark High Contrast: contrast borders on fields and panels
2. Toolbar with contrast border

Figma frame T03 (annotated)

Callouts:

1. Left panel collapsed to a 40 px rail
2. Canvas 656 px wide
3. Right panel keeps 264 px
4. Toolbar