Render header photo in place details

Shows the blurhash and fades in the image once downloaded

app/components/blurhash.gjs

@@ -0,0 +1,37 @@
+import Component from '@glimmer/component';
+import { modifier } from 'ember-modifier';
+import { decode } from 'blurhash';
+
+export default class Blurhash extends Component {
+  renderBlurhash = modifier((canvas, [hash, width, height]) => {
+    if (!hash || !canvas) return;
+
+    // Default size to a small multiple of aspect ratio to save CPU
+    // 32x18 is a good balance of speed vs quality for 16:9
+    const renderWidth = width || 32;
+    const renderHeight = height || 18;
+
+    canvas.width = renderWidth;
+    canvas.height = renderHeight;
+
+    const ctx = canvas.getContext('2d');
+    if (!ctx) return;
+
+    try {
+      const pixels = decode(hash, renderWidth, renderHeight);
+      const imageData = ctx.createImageData(renderWidth, renderHeight);
+      imageData.data.set(pixels);
+      ctx.putImageData(imageData, 0, 0);
+    } catch (e) {
+      console.warn('Failed to decode blurhash:', e);
+    }
+  });
+
+  <template>
+    <canvas
+      class="blurhash-canvas"
+      ...attributes
+      {{this.renderBlurhash @hash @width @height}}
+    ></canvas>
+  </template>
+}