Editor: dynamic input bounds + full hierarchy validation, layout polish

Bounds (new src/editor/bounds.js):
- Sets HTML5 min/max on every level + percent input each redraw,
  derived from the current values of related inputs so the spinner
  stops at the basin hierarchy:
  0 < outflowLevel < dryRunLevel < startLevel ≤ inflowLevel
      ≤ shiftLevel ≤ maxLevel ≤ overflowLevel ≤ basinHeight
- dryRunPercent capped so dryRunLevel ≤ startLevel given current outflow.
- shiftArmPercent ∈ [1, 100]; highVolumeSafety% ∈ [1, 100].

Validation:
- New visible ribbon above the basin diagram (#ps-basin-validation)
  listing every hierarchy violation. The in-SVG warning text is now a
  small reminder ("⚠ N ordering issues").
- basin-diagram.js owns hierarchy issues; mode-preview.js trimmed to
  only own shift-specific issues (shift > start, shift ≤ max,
  shiftArmPercent range, shiftLevel required-when-enabled).
- oneditsave blocks Deploy on the union of _psBasinValidationIssues
  and _psModeValidationIssues with a RED.notify listing all problems.

Layout polish:
- Side panel widened to 220 px with minmax(0, 1fr) first column so long
  labels can no longer push the rows past the panel edge.
- Basin SVG max-width 380 → 360, gap between side panel and SVG bumped
  14 → 28 px. Tank shifted right (x=145 width=110) so the inlet
  "bottom of pipe" sub-label is no longer clipped on the left edge.
- "0 m (datum)" moved below the tank (y=395, centred) so it can't
  collide with "Outlet / top of pipe" when outflowLevel is near floor.
- Zone labels shortened (Spare / Sewage + buffer / Buffer / Dead vol)
  and only show when the bracketing thresholds are ≥ 28 px apart, so
  they never sit on a threshold label.
- Mode preview axis labels under the chart removed — line colour +
  side-panel labels + hover-couple already identify each line. Stub
  <text> elements left hidden to keep the redraw loop simple. Arm-%
  line + label trimmed in 10 px on the right so they're not clipped.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/editor/oneditprepare.js

@@ -93,8 +93,19 @@
       ns.modePreview.redraw
     );
 
+    // Whenever any level/percent input changes, refresh the bounds first
+    // so the next redraw + validation sees the correct min/max attrs.
+    ns.bindRedraw(
+      ['basinHeight', 'basinVolume', 'overflowLevel', 'maxLevel',
+       'inflowLevel', 'startLevel', 'outflowLevel',
+       'dryRunThresholdPercent', 'highVolumeSafetyThresholdPercent',
+       'enableShiftedRamp', 'shiftLevel', 'shiftArmPercent'],
+      () => ns.bounds?.apply()
+    );
+
     // Initial render + hover-couple wiring once the DOM is settled.
     setTimeout(() => {
+      ns.bounds?.apply();
       ns.basinDiagram.redraw();
       ns.modePreview.redraw();
       ns.hoverCouple?.init();