history

File-panel layout stabilization

id: LK-20260630-file-panel-layout-stabilization
date: 2026-06-30
sequence: 19
type: fix
compatibility: compatible
component: `labkit.ui` | `3.2.3 -> 3.2.4`
component: `labkit.ui` | `3.2.4 -> 3.2.5`
scope: File-panel layout stabilization

Context

The single-file panel allocated too much height to its rows and could render inconsistently as the containing app resized. This was especially noticeable in file-heavy apps, where the panel competed with analysis controls and plots.

Decision and rationale

Give the panel explicit, compact row sizing and protect that geometry with GUI layout tests. The change stayed in the shared file-panel builder because the same visual defect appeared wherever the component was used.

Changes

• labkit.ui 3.2.3 -> 3.2.5

• Stabilized and compacted single file-panel layout.

User and data impact

File names and actions occupied less vertical space, leaving more room for the workflow below them. The change affected layout only; selections and loaded file data were unchanged.

Compatibility and migration

App definitions and selected files required no conversion. The shared panel kept the same controls and callbacks with revised row geometry.

Validation

Both commits extended GuiLayoutUiDeclarativeAppTest with the expected panel geometry. Exact historical test commands were not recorded.

Evidence

• Main commits 7f8df1cd and 02b2f1b6.

Known limitations and follow-up

Later runtime generations replaced this private UI 3.x builder, but retained the principle that shared components own and test their responsive geometry.