console : au survol, le curseur monte sans faire descendre les autres

- survol ou focus d'un curseur : il monte en 0,9 s ; les autres restent
  figés à leur niveau tant que la main est sur la console (dérive et
  rotation suspendues)
- dès le premier geste (survol, focus, clic, flèches), ce qui est monté
  reste monté : le visiteur pousse les curseurs un à un
- avant tout geste, l'animation du 29/09 est inchangée (dérive lente,
  un axe mis en avant à tour de rôle, arrêt au clic)
- prefers-reduced-motion : aucune transition, mêmes règles de niveaux

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/components/home/HomeConsole.vue

@@ -3,10 +3,10 @@
     ref="root"
     class="console"
     :class="{ 'console--compact': compact, 'console--still': reduced }"
-    @pointerenter="hovered = true"
-    @pointerleave="hovered = false"
-    @focusin="hovered = true"
-    @focusout="hovered = false"
+    @pointerenter="pointerIn = true; hold()"
+    @pointerleave="pointerIn = false; release()"
+    @focusin="focusIn = true; hold()"
+    @focusout="onFocusOut"
   >
     <div class="console-board">
       <!-- Scale, read bottom to top: from asservissement to émancipation -->
@@ -30,12 +30,17 @@
           type="button"
           role="tab"
           class="fader"
-          :class="{ 'fader--active': axis.key === active }"
+          :class="{ 'fader--active': axis.key === active, 'fader--lifting': axis.key === hot }"
           :style="{ '--hue': `var(${axis.hue})`, '--level': levels[axis.key] ?? 0, '--i': i }"
+          :data-axis="axis.key"
           :aria-selected="axis.key === active"
           :aria-controls="`panel-${uid}`"
           :tabindex="axis.key === active ? 0 : -1"
           @click="choose(axis.key)"
+          @pointerenter="hoverKey = axis.key; lift(axis.key)"
+          @pointerleave="hoverKey = null"
+          @focus="focusKey = axis.key; lift(axis.key)"
+          @blur="focusKey = null"
         >
           <span class="fader-track" aria-hidden="true">
             <span class="fader-fill" />
@@ -131,38 +136,95 @@ const current = computed(() => props.axes.find(a => a.key === active.value) ?? p
 // beats another axis is pushed up towards émancipation. Visitors watch it;
 // they can still pick an axis (click, arrows), which stops the rotation.
 // SSR renders every cursor at the bottom, so the first move is the rise.
+//
+// Under the visitor's hand (hover or focus), the board holds still: the
+// hovered cursor rises, the others keep their level. From the first touch
+// on, what is up stays up — the visitor pushes the cursors, one by one.
 const BEAT_MS = 2600
 const BEATS_PER_AXIS = 3
 
 const levels = reactive<Partial<Record<AxisKey, number>>>({})
 const reduced = ref(false)
-const hovered = ref(false)
 const visible = ref(true)
 const chosen = ref(false)
+const pointerIn = ref(false)
+const focusIn = ref(false)
+const hoverKey = ref<AxisKey | null>(null)
+const focusKey = ref<AxisKey | null>(null)
+/** The cursor under the visitor's hand: it rises faster */
+const hot = computed(() => hoverKey.value ?? focusKey.value)
+/** Axes the visitor has pushed up: they never go back down */
+const pushed = new Set<AxisKey>()
+let engaged = false
+let held = false
 let beat = 0
 let timer: ReturnType<typeof setInterval> | undefined
 
+function upLevel(i: number) {
+  return reduced.value ? 0.94 : 0.87 + 0.06 * Math.sin(beat * 0.9 + i * 2.1)
+}
+
+function downLevel(i: number) {
+  return reduced.value ? 0.3 : 0.3 + 0.14 * Math.sin(beat * 0.9 + i * 2.1)
+}
+
 function place() {
   props.axes.forEach((axis, i) => {
-    const isActive = axis.key === active.value
-    if (reduced.value) {
-      levels[axis.key] = isActive ? 0.94 : 0.3
-      return
-    }
-    const wave = Math.sin(beat * 0.9 + i * 2.1)
-    levels[axis.key] = isActive ? 0.87 + 0.06 * wave : 0.3 + 0.14 * wave
+    const up = axis.key === active.value || pushed.has(axis.key)
+    levels[axis.key] = up ? upLevel(i) : downLevel(i)
   })
 }
 
+/** Level currently drawn (mid-transition included), read from the DOM */
+function drawnLevel(key: AxisKey) {
+  const el = root.value?.querySelector<HTMLElement>(`[data-axis="${key}"]`)
+  const v = el ? Number.parseFloat(getComputedStyle(el).getPropertyValue('--level')) : Number.NaN
+  return Number.isFinite(v) ? v : (levels[key] ?? 0)
+}
+
+/** Stop every cursor where it stands, except the one being lifted */
+function freeze() {
+  for (const axis of props.axes) {
+    if (axis.key !== hot.value) levels[axis.key] = drawnLevel(axis.key)
+  }
+}
+
+function hold() {
+  if (held) return
+  held = true
+  freeze()
+}
+
+function release() {
+  if (pointerIn.value || focusIn.value) return
+  held = false
+}
+
+function onFocusOut(e: FocusEvent) {
+  focusIn.value = !!root.value?.contains(e.relatedTarget as Node | null)
+  release()
+}
+
+/** The visitor touches an axis: it rises, nothing else moves or comes down */
+function lift(key: AxisKey) {
+  if (!engaged) {
+    engaged = true
+    pushed.add(active.value)
+  }
+  pushed.add(key)
+  const i = props.axes.findIndex(a => a.key === key)
+  levels[key] = Math.max(drawnLevel(key), upLevel(i))
+}
+
 function advance() {
   const idx = props.axes.findIndex(a => a.key === active.value)
   active.value = props.axes[(idx + 1) % props.axes.length]!.key
 }
 
 function onBeat() {
-  if (!visible.value) return
+  if (!visible.value || held) return
   beat++
-  if (!chosen.value && !hovered.value && beat % BEATS_PER_AXIS === 0) advance()
+  if (!chosen.value && beat % BEATS_PER_AXIS === 0) advance()
   place()
 }
 
@@ -171,7 +233,11 @@ function choose(key: AxisKey) {
   active.value = key
 }
 
-watch(active, place)
+watch(active, (key) => {
+  if (engaged) pushed.add(key)
+  if (held) lift(key)
+  else place()
+})
 
 function onKeydown(e: KeyboardEvent) {
   const keys = ['ArrowRight', 'ArrowLeft', 'ArrowUp', 'ArrowDown', 'Home', 'End']
@@ -279,6 +345,11 @@ onMounted(() => {
   transition-delay: calc(var(--i) * 160ms);
 }
 
+/* Under the visitor's hand, the cursor answers at once */
+.fader--lifting {
+  transition: --level 0.9s cubic-bezier(0.22, 1, 0.36, 1);
+}
+
 .fader:focus-visible {
   outline: 2px solid hsl(var(--hue));
   outline-offset: 2px;
@@ -544,6 +615,7 @@ onMounted(() => {
 
 @media (prefers-reduced-motion: reduce) {
   .fader,
+  .fader--lifting,
   .fader-fill,
   .fader-name,
   .fader-lever,