FE-1535: Sweep parameters as intervals with a range slider

[kube]

🌟 What is the purpose of this PR?

A sweep parameter declared min, max, and a value count (default 5), and the navigator computed one grid point at a time. Declaring the count was noise and five points is too coarse to explore with. A sweep now declares an interval only, and the navigator selects a region of it with a range slider — the whole interval by default, resizable, collapsible to a point.

🔗 Related links

• FE-1535 (internal)

🔍 What does this change?

• Intervals quantize internally (SWEEP_AXIS_STEPS = 50; integer parameters step by whole numbers) — fine enough that returning a slider to an earlier position restores that position's cached runs and distributions, since cells are cached by quantized position.
• A range selection samples its region progressively: enumerateRegionCells visits the region's cells in a deterministic low-discrepancy order (Halton bases per axis), the session levels them rung by rung up the existing ladder, and the drawer shows the merge of every cached cell in the region — the distribution over the region takes shape after a few points and sharpens with coverage. A point selection is a one-cell region and behaves exactly as before.
• Every batch still has one concrete value per parameter, so per-batch scenario compilation, seeds (common random numbers per rung, unchanged), and GPU eligibility are untouched by range selections.
• The navigator becomes one RangeSlider per parameter (new two-thumb ds-components component whose thumbs may coincide) with a Range/Point control; drags commit on release so a gesture cancels at most one batch. The status line counts sampled cells and runs for regions.
• The create drawer asks for min and max only; the 200-combination cap and its warnings are gone (sampling is lazy, nothing is enumerated up front).
• The surface view samples an 11-position sub-grid per axis of the same quantized space, holds other parameters at the middle of their selected range, and clicking it collapses both shown axes to a point at the clicked position.

🐾 How to test

Storybook → Simulate / SimulateView → "Parameter sweep": both sliders render with Range/Point controls; switching transmission_rate to Range spans 0.1 – 0.5 with two thumbs; clicking the surface collapses both parameters to a point at the clicked position (verified live, plus 25 parameter-grid and 12 sweep-session unit tests covering quantization, region enumeration, leveling, cache reuse, and the widened-region merge).

Pre-Merge Checklist 🚀

🚢 Has this modified a publishable library?

This PR:

• modifies an existing block or library which will be updated (@hashintel/petrinaut, @hashintel/ds-components; patch changesets included)

📜 Does this require a change to the docs?

The changes in this PR:

• require changes to docs which are made as part of this PR

🕸️ Does this require a change to the Turbo Graph?

The changes in this PR:

• do not affect the execution graph

🤖 Generated with Claude Code

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