fix(manifold): particle top bar = a-immersive heatmap strip, not macro axes

ParticleStage showed the Boldness/Memory/Precision macro sliders across the
top, but the a-immersive design this mode clones uses a thin per-output
heatmap strip (one colored bar per visual output, width = live value). The
deployed a-immersive never used the macro-axis surface.

- flow-field.ts: export VISUAL_PARAM_NAMES/COLORS + N_VISUAL_OUTPUTS (verbatim
  from a-app.js:46/51)
- ParticleStage: replace macro-slider bar with the 22px heatmap strip; bar
  widths updated imperatively in the existing rAF loop; hover tooltip with
  live value; drop unused axes props
- ConsoleApp: update call site

manifold/src/console/ConsoleApp.tsx

@@ -719,12 +719,7 @@ export function ConsoleApp({ focus: initialFocus = 'composite' }: ConsoleAppProp
           }}
         >
           {outputMode === 'particles' ? (
-            <ParticleStage
-              pos={pos}
-              onMove={onMove}
-              axes={axes}
-              setAxis={(k, v) => setAxes((s) => ({ ...s, [k]: v }))}
-            />
+            <ParticleStage pos={pos} onMove={onMove} />
           ) : focus === 'composite' ? (
             <CompositeStage
               split={split}

manifold/src/console/ParticleStage.tsx

@@ -4,32 +4,43 @@
  * Mirrors the a-immersive playground layout:
  *   • a full-bleed Canvas2D flow-field particle system (the main view), driven
  *     by the live model outputs (first 20) read each animation frame;
- *   • a horizontal macro-axis slider bar across the top (Boldness / Memory /
- *     Precision), the same compound axes the rest of the console uses;
+ *   • a thin horizontal heatmap strip across the top, one colored bar per
+ *     visual output (Flow / Scale / Speed / …), each bar's width = its live
+ *     value — the same `.heatmap-strip` the a-immersive app shows above the
+ *     flow field (NOT the Boldness/Memory/Precision macro axes, which the
+ *     deployed a-immersive never used);
  *   • a small circular pad in the bottom-left corner that drives the 2D input
  *     (engine.setInput) — the "joystick" of the immersive app.
  *
  * The canvas animates on its own rAF clock so particles keep flowing between
- * inferences; only the *field* parameters change when the MLP outputs do.
+ * inferences; only the *field* parameters change when the MLP outputs do. The
+ * heatmap bar widths are driven imperatively from the same loop so we don't
+ * churn React state every frame.
  */
-import { useEffect, useRef } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import { useEngine } from '../engine';
-import { ControlAxis } from '../primitives/ControlAxis';
 import { VirtualJoystick } from '../primitives/VirtualJoystick';
-import { FlowFieldVisualizer } from './flow-field';
-import type { Axes } from './types';
+import {
+  FlowFieldVisualizer,
+  N_VISUAL_OUTPUTS,
+  VISUAL_PARAM_COLORS,
+  VISUAL_PARAM_NAMES,
+} from './flow-field';
 
 export interface ParticleStageProps {
   pos: [number, number];
   onMove: (x: number, y: number) => void;
-  axes: Axes;
-  setAxis: (k: keyof Axes, v: number) => void;
 }
 
-export function ParticleStage({ pos, onMove, axes, setAxis }: ParticleStageProps) {
+export function ParticleStage({ pos, onMove }: ParticleStageProps) {
   const engine = useEngine();
   const canvasRef = useRef<HTMLCanvasElement>(null);
   const vizRef = useRef<FlowFieldVisualizer | null>(null);
+  const barsRef = useRef<(HTMLDivElement | null)[]>([]);
+  const tooltipRef = useRef<HTMLDivElement>(null);
+  const outputsRef = useRef<Float32Array | null>(null);
+  const hoverRef = useRef<number | null>(null);
+  const [hover, setHover] = useState<number | null>(null);
 
   useEffect(() => {
     const canvas = canvasRef.current;
@@ -40,7 +51,20 @@ export function ParticleStage({ pos, onMove, axes, setAxis }: ParticleStageProps
     let raf = 0;
     const tick = () => {
       const outputs = engine?.getOutputs();
-      if (outputs) viz.setParams(outputs);
+      if (outputs) {
+        outputsRef.current = outputs;
+        viz.setParams(outputs);
+        // Drive the heatmap bar widths imperatively (cheap; no React churn).
+        for (let i = 0; i < N_VISUAL_OUTPUTS; i++) {
+          const bar = barsRef.current[i];
+          if (bar) bar.style.width = `${Math.max(0, Math.min(1, outputs[i] ?? 0)) * 100}%`;
+        }
+        // Keep the tooltip value live while hovering a cell.
+        const h = hoverRef.current;
+        if (h != null && tooltipRef.current) {
+          tooltipRef.current.textContent = `${VISUAL_PARAM_NAMES[h]}: ${(outputs[h] ?? 0).toFixed(3)}`;
+        }
+      }
       viz.draw();
       raf = requestAnimationFrame(tick);
     };
@@ -64,7 +88,7 @@ export function ParticleStage({ pos, onMove, axes, setAxis }: ParticleStageProps
         style={{ position: 'absolute', inset: 0, width: '100%', height: '100%', display: 'block' }}
       />
 
-      {/* Top horizontal macro-axis slider bar (Boldness / Memory / Precision) */}
+      {/* Top heatmap strip — one colored bar per visual output, width = value */}
       <div
         style={{
           position: 'absolute',
@@ -73,51 +97,86 @@ export function ParticleStage({ pos, onMove, axes, setAxis }: ParticleStageProps
           right: 0,
           zIndex: 20,
           display: 'flex',
-          gap: 'var(--sp-2)',
-          padding: 'var(--sp-2) var(--sp-3)',
-          alignItems: 'center',
-          background: 'var(--glass)',
-          backdropFilter: 'blur(14px)',
-          WebkitBackdropFilter: 'blur(14px)',
-          borderBottom: '1px solid var(--line)',
+          alignItems: 'flex-end',
+          height: 22,
+          padding: '2px 4px',
+          background: 'var(--glass, rgba(13,13,13,0.5))',
+          backdropFilter: 'blur(8px)',
+          WebkitBackdropFilter: 'blur(8px)',
+        }}
+        onPointerLeave={() => {
+          hoverRef.current = null;
+          setHover(null);
         }}
       >
-        <strong
+        <div
           style={{
-            color: 'var(--accent)',
-            fontSize: 'var(--fs-md)',
-            fontFamily: 'var(--font-mono)',
-            whiteSpace: 'nowrap',
-            paddingRight: 'var(--sp-2)',
+            display: 'flex',
+            flex: 1,
+            gap: 1,
+            height: 16,
+            borderRadius: 3,
+            overflow: 'hidden',
           }}
         >
-          MEMLNaut
-        </strong>
-        <ControlAxis
-          label="Boldness"
-          endpoints={['Caution', 'Bold']}
-          value={axes.boldness}
-          onChange={(v) => setAxis('boldness', v)}
-          style={{ flex: 1 }}
-        />
-        <ControlAxis
-          label="Memory"
-          endpoints={['Amnesia', 'Elephant']}
-          value={axes.memory}
-          onChange={(v) => setAxis('memory', v)}
-          accent="var(--accent-2)"
-          style={{ flex: 1 }}
-        />
-        <ControlAxis
-          label="Precision"
-          endpoints={['Raw', 'Precise']}
-          value={axes.precision}
-          onChange={(v) => setAxis('precision', v)}
-          accent="var(--ok, var(--accent))"
-          style={{ flex: 1 }}
-        />
+          {VISUAL_PARAM_NAMES.map((name, i) => (
+            <div
+              key={name}
+              title={name}
+              onPointerEnter={() => {
+                hoverRef.current = i;
+                setHover(i);
+              }}
+              style={{
+                position: 'relative',
+                flex: 1,
+                minWidth: 0,
+                height: 16,
+                background: 'rgba(255,255,255,0.04)',
+                overflow: 'hidden',
+                cursor: 'pointer',
+              }}
+            >
+              <div
+                ref={(el) => {
+                  barsRef.current[i] = el;
+                }}
+                style={{
+                  height: '100%',
+                  width: '30%',
+                  background: VISUAL_PARAM_COLORS[i],
+                  borderRadius: '0 1px 1px 0',
+                  filter: hover === i ? 'brightness(1.3)' : 'none',
+                  pointerEvents: 'none',
+                }}
+              />
+            </div>
+          ))}
+        </div>
       </div>
 
+      {/* Hover tooltip (name + live value) */}
+      <div
+        ref={tooltipRef}
+        style={{
+          position: 'absolute',
+          top: 28,
+          left: 8,
+          zIndex: 25,
+          padding: '4px 10px',
+          background: 'rgba(0,0,0,0.85)',
+          border: '1px solid var(--line, rgba(255,255,255,0.12))',
+          borderRadius: 6,
+          fontSize: 12,
+          fontFamily: 'var(--font-mono)',
+          color: 'var(--fg, #eee)',
+          pointerEvents: 'none',
+          whiteSpace: 'nowrap',
+          opacity: hover != null ? 1 : 0,
+          transition: 'opacity 0.15s',
+        }}
+      />
+
       {/* Bottom-left circular pad — drives the 2D input */}
       <div style={{ position: 'absolute', left: 18, bottom: 18, zIndex: 20 }}>
         <VirtualJoystick size={120} position={pos} onMove={onMove} ariaLabel="particle input pad" />

manifold/src/console/flow-field.ts

@@ -69,6 +69,26 @@ function noise2D(x: number, y: number): number {
 
 const TWO_PI = Math.PI * 2;
 
+/**
+ * The 20 visual output params, in output order (p0..p19). Names and colours are
+ * verbatim from the a-immersive original (`VISUAL_PARAM_NAMES` /
+ * `VISUAL_PARAM_COLORS`, a-app.js:46/51) so the heatmap strip matches it 1:1.
+ */
+export const VISUAL_PARAM_NAMES = [
+  'Flow', 'Scale', 'Speed', 'Hue', 'Spread', 'Size', 'Trail', 'Turb',
+  'Attract', 'Radius', 'DispRate', 'DispAmt', 'Lifetime', 'Respawn',
+  'Advection', 'Inertia', 'Drag', 'Repulse', 'RepCnt', 'RepRate',
+] as const;
+
+export const VISUAL_PARAM_COLORS = [
+  '#ff6a00', '#00ccff', '#ff6600', '#ff00cc', '#ffcc00', '#88ff00',
+  '#0088ff', '#ff3366', '#9bff5f', '#59d3ff', '#ff8f3f', '#a0b7ff',
+  '#f4ff7a', '#ffa8db', '#7dffc8', '#ffd166', '#8ad4ff', '#ff5f5f',
+  '#ffc15f', '#ff8a3d',
+] as const;
+
+export const N_VISUAL_OUTPUTS = VISUAL_PARAM_NAMES.length;
+
 interface Particle {
   x: number;
   y: number;