ENG-10514: Update toolbar style

[carlosabadia]

No description provided.

[linear-code]

ENG-10514

[greptile-apps]

Greptile Summary

This PR redesigns the chart toolbar and expands its interaction controls. The main changes are:

• Adds surface dragging with an adaptive external handle.
• Moves view history into the zoom menu.
• Adds Pan toggling and revised export controls.
• Adds lasso vertex removal and selection clearing.
• Updates toolbar styling, documentation, and browser tests.

Confidence Score: 5/5

This looks safe to merge.

No blocking issues found in the changed code.

T-Rex Logs

What T-Rex did

• Validated the runtime proof records for the UI controls, confirming the Zoom items Back, Next, Zoom In, Zoom Out, Box Zoom, Fit Data, Reset View, and the Export items PNG, SVG, and CSV were updated.
• Confirmed the pan state changed from pressed/active to false/false in the proof evidence.
• Verified the toolbar drag position updated from (503,601) to (437,676).
• Checked that the dark-mode toggle applied by setting html.className to dark and the body background to rgb(9, 10, 11).
• Noted that no changed toolbar-flow was proven; the status is inconclusive due to an incomplete required before/after pair.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
js/src/20_theme.ts	Redesigns toolbar tokens, buttons, menus, drag affordances, themes, and accessibility states.
js/src/53_interaction.ts	Updates toolbar construction, dragging, menus, Pan behavior, exports, history controls, and lasso interactions.
js/src/57_viewstate.ts	Moves disabled history-button presentation from inline styles to the toolbar stylesheet.
tests/test_view_state_client.py	Adds browser coverage for toolbar dragging, history controls, and selection interactions.
scripts/render_smoke_nonumpy.py	Expands smoke checks for toolbar placement, visibility, dragging, menus, exports, and Pan toggling.

_{Reviews (8): Last reviewed commit: "Merge remote-tracking branch 'origin/mai..." | Re-trigger Greptile}

[codspeed-hq]

Merging this PR will not alter performance

✅ 102 untouched benchmarks
⏩ 1 skipped benchmark¹

---

_{Comparing carlos/update-toolbar (731a829) with main (68617fe)}

Footnotes

1. 1 benchmark was skipped, so the baseline result was used instead. If it was deleted from the codebase, click here and archive it to remove it from the performance reports. ↩

[Alek99]

Needs to address the changes in slack