Rect-list draw aborts with "prepared rectangle artifacts are missing" when its pixel variant was prepared at draw #1927

Stray (PPSA02100 v1.05, Unreal Engine 4) aborts on a rect-list draw:

[videoout] presentation failed: AGC driver: prepared rectangle artifacts are missing

Setup: Linux (Nobara 44, kernel 7.2), RTX 5070 Ti, NVIDIA 595.91.07. Base is main 1be6f9f + #861 + #1836 + #1837 + #1893 + #1902 + #1904.

A rect-list draw looks up PreparedRectangle(front, vertexVariant, fragmentVariant). Rectangles are only built in ResolvePreparedGraphics, which runs when the title calls sceAgcCreateInterpolantMapping with its own pixel shader. A pixel variant that is prepared later, at the draw, never gets a rectangle with that front. Two cases do that today: the driver's null pixel program (#1901 / #1902) and shaders deferred at registration (#1836). In Stray the draw right after The null pixel program has no artifact for this draw ...; preparing it at draw is a rect-list draw, and it aborts here.

Fix: when the rectangle is missing, build it at the draw with ResolvePreparedGraphics from the two stages, which are already prepared, then look it up again. Only the rect-list helper is built; neither stage is recompiled. PR: #____

AI-assisted: yes