Gradients tint per vertex; a layer's textures sort by handle

[samwhosung]

On the stock credits screen the fades drew as solid black boxes over the text, and the black bars covered the borders.

A texture's gradient now tints its four vertices over the texel (0x77f910, TL BL TR BR). A gradient alone draws nothing, and any vertex-colour write collapses it (0x77f750).

A layer batch sorts its quads by texture handle at End (0x7731a0), with an exact port of the client's qsort. Its tie order was checked against the client's own code. The client's handles are heap addresses, so different textures rank by a creation stamp that follows allocation order. That is a narrowed Deviation.

Extract costs what it did before. The options window's ground dim moves to BORDER to keep its look.

Tests cover the gradient, the sort and the stock credits frame.

Fixes #874
Fixes #1095
Fixes #1092

🤖 Generated with Claude Code

🤖 Generated with Claude Code