[johnml1135]

Start here: docs/images/bidi-selection.png and docs/images/selection-bar.png. By default the playground shows what a person writing sees; developers turn on the rest.

• Default view: a scenario picker, the field, and the field as FieldWorks Markdown beside it, editable, with Apply and Revert. The explanation text is gone.
• Selection bar (PlaygroundView.SelectionBar.cs): built on Avalonia's Popup, with no new package and the same behaviour on both Avalonia lines.
  • It floats above the selection while there is one.
  • The simple row is B, I and U, the writing system and the character style. More opens the paragraph style and Picture.
  • It never takes focus. A context menu replaces it, and SelectionBarEnabled turns it off.
• Developer mode (a check box, or --dev on both hosts) brings back every tool bar, the Model tab and the event log. The test harness runs in developer mode unless a test is about the default.
• Real pictures: sample pictures are FieldWorks picture data (U+0008 plus the GUID) for two pictures of the sample project. The Markdown writes them as ![Red square](/files/pictures/red-square.png){guid=…} instead of s6x=…, and an unknown picture path is fwmd.picture.unknown.
• Bold, italic and underline are now stored with FieldWorks' enum variation (ktpvEnum), so the Markdown writes **word** rather than {p3=1:default}.
• One paging test now accepts a first visible line that is cut off by the edge. That matches its bottom check; it changed because the new top bar moved the viewport.

Tests: 334 pass on net48 and on net10.0. The 7 new tests are in SimplePlaygroundTests. All 17 screenshots were regenerated: 15 headless, including the new selection-bar.png, and 2 real windows.

Not here: how spaces should be written (#172). Two research lanes are queued for it.

🤖 Generated with Claude Code