Initial commit: trueref v0.1.0-SNAPSHOT

Java 21 / Spring Boot 3.5.3 multi-module Maven project.
Hybrid BM25+HNSW search with RRF, cross-encoder reranker,
ONNX Runtime 1.22.0 (CPU + CUDA 12 GPU variants).

trueref-frontend/web/src/lib/components/BarChart.svelte

@@ -0,0 +1,73 @@
+<script lang="ts">
+  interface Datum {
+    label: string;
+    value: number;
+  }
+  interface Props {
+    data: Datum[];
+    height?: number;
+    format?: (n: number) => string;
+  }
+  let { data, height = 180, format = (n) => n.toLocaleString() }: Props = $props();
+
+  let safeData = $derived(data ?? []);
+  let max = $derived(Math.max(1, ...safeData.map((d) => d.value)));
+</script>
+
+<div class="bars" style="--h: {height}px;">
+  {#each safeData as d (d.label)}
+    <div class="row">
+      <div class="lbl" title={d.label}>{d.label}</div>
+      <div class="track">
+        <div class="fill" style="width: {(d.value / max) * 100}%"></div>
+      </div>
+      <div class="val">{format(d.value)}</div>
+    </div>
+  {:else}
+    <div class="empty">No data yet.</div>
+  {/each}
+</div>
+
+<style>
+  .bars {
+    display: flex;
+    flex-direction: column;
+    gap: 6px;
+    max-height: var(--h);
+    overflow-y: auto;
+  }
+  .row {
+    display: grid;
+    grid-template-columns: 160px 1fr 90px;
+    gap: 10px;
+    align-items: center;
+    font-size: 12px;
+  }
+  .lbl {
+    overflow: hidden;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+    color: var(--fg-dim);
+  }
+  .track {
+    background: var(--bg-alt);
+    border: 1px solid var(--border);
+    height: 10px;
+    border-radius: 4px;
+    overflow: hidden;
+  }
+  .fill {
+    background: var(--accent);
+    height: 100%;
+  }
+  .val {
+    text-align: right;
+    font-family: var(--mono);
+    color: var(--fg-dim);
+  }
+  .empty {
+    color: var(--muted);
+    font-style: italic;
+    font-size: 12px;
+  }
+</style>