fix(frame): render diagonal quadrant blocks

[kitlangton]

What

Render ▚ and ▞ as exact terminal-cell geometry in screenshots, recordings, and catalog frames instead of relying on font glyph metrics.

Before / After

Before: diagonal quadrant blocks went through font rendering, where glyph side bearings made the Snake joints look narrower than full terminal quadrants.

After: each glyph is drawn as two exact half-cell rectangles, matching terminal geometry edge to edge.

How

• packages/drive/src/frame/index.ts defines the two quadrant pairs and draws them through the shared renderer-neutral block path.
• packages/drive/test/frame.test.ts locks down all rectangle coordinates for both glyphs.
• A patch changeset records the visible rendering correction.

Scope

This only changes geometric rendering for ▚ and ▞. Other symbols continue using their existing block geometry or fallback fonts.

Testing

• bun run test:effect test/frame.test.ts test/recording/export.test.ts (17 passed)
• bun run typecheck
• bun run lint
• git diff --check

Demo

Deterministic Drive capture using the diagonal Snake glyphs:

Flow

flowchart LR
  Glyph[Captured ▚ or ▞] --> Geometry[Shared frame geometry]
  Geometry --> Rectangles[Two half-cell rectangles]
  Rectangles --> Output[PNG, MP4, or catalog canvas]

Loading