Found by running and debugging the Linux build on a virtual display:
- impl_linux.go: set fontSize (16, like Darwin). It was only defined
for the Android and Darwin builds, so on Linux every label and
button was rendered at size zero (all text invisible).
- ui.go: extend the Button click area to the full button width, not
just the label width. Short labels (e.g. a few characters in a
full-width list row) had a tiny tap target that was easy to miss.
- main.go: set Color: black on the insert-page buttons (<, >, generate,
@, #). A zero-value NRGBA has A=0 (transparent), so their labels
were invisible even though the buttons worked.
- main.go: gofmt (modern operator spacing).
- Event loop: call w.Event() and FrameEvent.Frame() on the same
goroutine; no channel bridge (the bridge broke frame rendering).
- clip: use clip.UniformRRect(...).Push(gtx.Ops) / Pop() for real
clipping in layoutRRect (old .Add(ops) painted unclipped).
- Window clear color is white in v0.10.2.
- Fonts: always provide gofont; on Android use
WithCollection(gofont.Collection()).
- Button labels: explicitly set Color (zero-value NRGBA has A=0,
i.e. transparent, so labels were invisible).
- Filter: detect changes by comparing the editor text, since
material.Editor.Layout consumes the editor's input events
internally and a later FilterEd.Update(gtx) never sees them.
- idPage: persist the manually entered ID with store.SetID (on
Android nativeIdentities is unimplemented, so there are no id
buttons to click).
- Use U+2026 (gofont) instead of U+22EE (not in gofont) for the
menu button.
- Split getConfDir/noidLabelText out into impl_linux.go for the
Linux build.
