fix(common): skip content resize when DataView has no items

[ghiscoding]

Summary

Prevent double-click column auto-resize from changing the column width when a custom DataView does not expose any items.

Why

Windowed or custom DataViews may return an empty array from getItems(). Resizing in that situation incorrectly recalculates the column width from its minimum width.

Changes

• Skip single-column resize-by-content when getItems() is unavailable or empty.
• Preserve the current column width.
• Add regression coverage for empty custom DataViews.

Validation

• pnpm exec vitest run packages/common/src/services/__tests__/resizer.service.spec.ts --config test/vitest.config.mts
• pnpm exec prettier --check packages/common/src/services/resizer.service.ts packages/common/src/services/__tests__/resizer.service.spec.ts

Comments

Custom or windowed DataViews can provide their own asynchronous resize handler when they need to fetch rows before measuring content.

AI / LLM assistance

• AI / LLM assistance used:
  • No
  • Yes
• If Yes:
  • which tool/model: OpenAI Codex, GPT-5
  • how was it used: Reviewed the implementation, proposed the defensive guard, added tests, and verified formatting and unit tests.

Checklist

• The changes are limited to only one scope.
• Tests were added or updated where appropriate.
• Documentation was updated where appropriate.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.0%. Comparing base (53ee739) to head (4c142bd).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2778   +/-   ##
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  Coverage   100.0%   100.0%           
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  Files         199      199           
  Lines       25773    25776    +3     
  Branches     9131     9132    +1     
=======================================
+ Hits        25773    25776    +3     

Flag	Coverage Δ
angular	100.0% <ø> (ø)
universal	100.0% <100.0%> (ø)

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commit: 4c142bd