Stop resetting experiment data on window resize (shrink), warn on grow

[meganrm]

Problem

Estimated review size: medium

clientSimulator in App.tsx was a useMemo depending on viewportSize.width/height. Any window resize — even shrinking, even a single pixel — recreated the entire BindingSimulator and, as side effects inside the memo body (a React anti-pattern), called setInputConcentration(...) and clearAllAnalysisState(), silently wiping any recorded equilibrium data.

Fixes #224

Solution

Resize handling is now asymmetric and intentional:

• Shrinking the window never recreates the simulator or clears analysis state — the simulation keeps its existing coordinate space.
• Growing the window still recreates the simulator (a bigger box needs more agents at the same concentration, so this is necessary) and still clears analysis state.
• The first time a grow-triggered reset fires in a session, a one-time antd Modal.warning() explains why, so students aren't surprised mid-experiment.

setInputConcentration/clearAllAnalysisState were also moved out of the useMemo body into a separate useEffect keyed on [currentModule, sectionType], so they only fire on real experiment changes, never as a useMemo side effect.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Change summary:

• Stop recreating the simulator / wiping analysis state when the window shrinks
• Warn once (session-scoped) before a grow-triggered reset actually clears data
• Move setInputConcentration/clearAllAnalysisState into a useEffect keyed on [currentModule, sectionType], out of the useMemo body

Steps to Verify:

1. Record an equilibrium point, then shrink the browser window
2. Confirm the recorded data is still there
3. Record another point, then grow the window
4. Confirm a warning modal appears (first time only this session), then data resets
5. Grow/shrink again in the same session — confirm no repeat warning
6. Switch modules — confirm concentrations/analysis still reset as before, independent of window size

Screenshots (optional):

Keyfiles (delete if not relevant):

1. src/App.tsx

Thanks for contributing!