fix: honor pie label.alignTo='labelLine' when label.position='outside'

[mvanhorn]

Summary

When a pie chart series sets label.position to 'outside' (an alias for 'outer') and label.alignTo to 'labelLine', the labelLine alignment pass was being silently bypassed. The fix is a 2-line change to also match 'outside' at labelLayout.ts:137.

Why this matters

The rest of the pie label pipeline treats outside and outer as the same position value. The labelLayout alignment branch is the one place that hardcoded just 'outer', so users setting position: 'outside' (the documented alias) saw misaligned label lines while position: 'outer' worked correctly. Reporter pinpointed the exact line.

Changes

• src/chart/pie/labelLayout.ts - widen the position check to accept both 'outer' and 'outside' in adjustSingleSide.
• test/ut/spec/series/pie.test.ts - add a regression test that asserts both 'outer' and 'outside' produce identical labelLine layouts when alignTo: 'labelLine'.

Testing

npm run test:ut -- pie.test (Karma + Jasmine).

Fixes #21617

[echarts-bot]

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[Justin-ZS]

Runtime change LGTM.

CI is failing in the added regression test because data.getLayout('cx') is undefined for pie. Please use sector.shape.cx or data.getItemLayout(idx).cx instead before merging.

Also worth a follow-up docs cleanup: the pie docs currently mix outside and outer in the label/alignTo descriptions.