BorderSchema

Draws a border around the tile, applied over the background in styledWith().

• color — border color (any ColorSchema variant).

• thickness — border width in dp.

• radius — optional corner radius as RadiusSchema. When null, the border uses RectangleShape (sharp corners). To get rounded borders, provide a RadiusSchema; this is independent of ClipSchema — both can coexist.

DSL helpers (mosaic-server):

border(color = color(themeColorOutline()), thickness = 1)
border(
    color = color(themeColorOutline()),
    thickness = 1,
    radius = radius(topStart = 8, topEnd = 8, bottomStart = 8, bottomEnd = 8)
)
// border(color = ..., thickness = 1, radius = 8) ← WRONG — radius must be RadiusSchema, not Int