feat(ui): render the Display panel's bloom and sharpen from a store

src/ui/stores/display.js

@@ -0,0 +1,19 @@
+import { defineStore } from 'pinia';
+import { markRaw, shallowRef } from 'vue';
+
+/**
+ * The Display panel as its view renders it. VisualSettings presents the
+ * post-processing groups (`_presentDisplay()`) and publishes them here;
+ * it keeps its listeners on the panel's controls.
+ */
+export const useDisplayStore = defineStore('gev-display', () => {
+  /** The presented panel; null until VisualSettings first renders. */
+  const view = shallowRef(null);
+
+  /** @param {object} next A fresh presentation; every publish re-renders. */
+  function publish(next) {
+    view.value = markRaw(next);
+  }
+
+  return { view, publish };
+});