[HarryCordewener]

Why

Avalonia knows its actual cell geometry, but MXP image sizing assumed 8×16 cells. At the default 16px font and line height 1.12, measured cells are 10×24. A square therefore stretched vertically.

Changes

• Publish immutable measured logical-pixel cell dimensions from TerminalView, initially and after display/font scaling.
• Use those dimensions for auto sizing, pixel hints and aspect-preserving one-dimensional hints.
• Keep explicit two-dimensional character-cell boxes as server-specified geometry.
• Include cell dimensions in rendered-image cache keys; reuse the source image without refetching when dimensions change.
• Preserve the existing fallback for terminal hosts with unknown metrics.

Fixes #121. This does not fix #119, rebuild already-buffered image blocks, or claim the cause of the particular screenshot.

Checks

• Release solution build passed, with existing CS8602 in ListEditorTests.cs:191.
• All seven suites passed: TUI 3,020; Core 1,720; Client 245; Graphics 99; Scripting 92; Web 37; Avalonia 899.
• Final fallback-preservation adjustment rechecked with the full TUI suite: 3,020 passed.
• Desktop metric bridge / bundled font tests: 6 passed.
• MXP geometry tests: 29 passed.

Parallel changes

Independent of zoom and alpha fixes. Zoom uses TerminalView.Rescale, so metric publication follows that path. Alpha PR #120 touches nearby InlineImageHost sizing code; resolve any merge overlap without dropping either payload preservation or cellSize forwarding.

[coderabbitai]

Caution

Review failed

The pull request is closed.

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