[codex] Fix Batch Crop filePanel id crash

[Pluze]

Summary

Fixes #25 by hardening the shared filePanel entry normalization used when apps programmatically refresh file lists.

Root cause

Batch Crop can load a folder scan into the file panel and then refresh the same list with app-owned status entries. The shared filePanel helper assumed incoming id, path, displayName, and status fields were scalar text. If an entry carried an empty or non-scalar field, assignFileIds evaluated a non-scalar short-circuit condition and raised MATLAB:nonLogicalConditional during selection refresh.

Changes

• Normalize filePanel entry text fields to scalar strings before completing entries and assigning ids.
• Regenerate empty or duplicate ids deterministically.
• Add a UI GUI regression covering malformed file-entry ids/status values during labkit.ui.view.setValue.
• Bump the labkit.ui facade version to 3.2.1.

Validation

• git diff --check
• /Applications/MATLAB_R2025a.app/bin/matlab -batch "buildtool changed" passed after sandbox launcher retry with escalated permissions.

Notes

Docs/AGENTS unchanged; public UI ownership and validation-routing contracts were preserved.