优化图谱渲染

meeting_memory/web_demo/static/graph.js

@@ -143,6 +143,20 @@ function renderGraph(payload) {
     .map((e) => ({ ...e, sourceNode: nodeById.get(e.source), targetNode: nodeById.get(e.target) }))
     .filter((e) => e.sourceNode && e.targetNode);
 
+  // ── adjacency map for hover highlight ──
+  const nodeEdges = new Map();  // nodeId -> Set of edge indices
+  const nodeNeighbors = new Map();  // nodeId -> Set of neighbor nodeIds
+  dataNodes.forEach(n => {
+    nodeEdges.set(n.id, new Set());
+    nodeNeighbors.set(n.id, new Set());
+  });
+  dataEdges.forEach((e, i) => {
+    nodeEdges.get(e.source).add(i);
+    nodeEdges.get(e.target).add(i);
+    nodeNeighbors.get(e.source).add(e.target);
+    nodeNeighbors.get(e.target).add(e.source);
+  });
+
   const n = dataNodes.length;
   const area = svgW * svgH;
   const repulsionStr = Math.max(3000, area / Math.max(n, 1));
@@ -203,9 +217,45 @@ function renderGraph(payload) {
     text.textContent = truncate(node.label, TRUNCATE_LENGTH);
     g.appendChild(text);
     mainGroup.appendChild(g);
+
+    // ── hover highlight ──
+    g.addEventListener('mouseenter', () => applyFocus(node));
+    g.addEventListener('mouseleave', () => { if (!isDragging) clearFocus(); });
+
     return g;
   });
 
+  // ── focus / dim helpers ──
+  function applyFocus(hoveredNode) {
+    const connectedEdges = nodeEdges.get(hoveredNode.id);
+    const connectedNodes = nodeNeighbors.get(hoveredNode.id);
+    dataNodes.forEach((n, idx) => {
+      const el = nodeEls[idx];
+      if (!el) return;
+      const isTarget = n.id === hoveredNode.id || (connectedNodes && connectedNodes.has(n.id));
+      el.classList.toggle('graph-dim', !isTarget);
+      el.classList.toggle('graph-focus', isTarget);
+    });
+    dataEdges.forEach((e, idx) => {
+      const el = edgeEls[idx];
+      if (!el) return;
+      const isConnected = connectedEdges && connectedEdges.has(idx);
+      el.classList.toggle('graph-dim', !isConnected);
+      el.classList.toggle('graph-focus', isConnected);
+    });
+  }
+
+  function clearFocus() {
+    dataNodes.forEach((n, idx) => {
+      const el = nodeEls[idx];
+      if (el) { el.classList.remove('graph-dim', 'graph-focus'); }
+    });
+    dataEdges.forEach((e, idx) => {
+      const el = edgeEls[idx];
+      if (el) { el.classList.remove('graph-dim', 'graph-focus'); }
+    });
+  }
+
   function syncDom() {
     for (let i = 0; i < dataEdges.length; i++) {
       const edge = dataEdges[i], el = edgeEls[i];
@@ -330,6 +380,7 @@ function renderGraph(payload) {
       dragOccurred = false;
       dragNode = dataNodes.find((n) => n.id === target.dataset.nodeId);
       if (dragNode) {
+        applyFocus(dragNode);
         const r = graphSvg.getBoundingClientRect();
         dragOffX = (e.clientX - r.left - zoomTransform.x) / zoomTransform.k - dragNode.x;
         dragOffY = (e.clientY - r.top - zoomTransform.y) / zoomTransform.k - dragNode.y;
@@ -367,6 +418,7 @@ function renderGraph(payload) {
       if (el) el.style.cursor = "grab";
       dragNode.vx = 0;
       dragNode.vy = 0;
+      clearFocus();
       wakeSim();
     }
     isDragging = false;

meeting_memory/web_demo/static_v2/styles.css

@@ -862,6 +862,17 @@ textarea {
   box-shadow: var(--shadow-lg);
 }
 
+.detail-modal {
+  border: none;
+  border-radius: 12px;
+  padding: 0;
+  width: min(640px, 90vw);
+  max-height: 80vh;
+  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
+  inset: 0;
+  margin: auto;
+}
+
 .detail-modal::backdrop {
   background: rgba(30, 41, 59, 0.3);
 }
@@ -1143,6 +1154,25 @@ textarea {
 
 .graph-node:hover circle { opacity: 0.8; }
 
+/* ── hover / drag dim + focus ── */
+.graph-dim { opacity: 0.2 !important; transition: opacity 0.2s; }
+.edge-wrap { transition: opacity 0.2s; }
+
+.graph-focus circle {
+  filter: drop-shadow(0 0 8px rgba(6, 182, 212, 0.5));
+}
+.graph-focus text[data-type="node-label"] {
+  font-weight: 700;
+}
+.edge-wrap.graph-focus .graph-edge {
+  stroke: var(--gray-500);
+  stroke-width: 2.5;
+}
+.edge-wrap.graph-focus text[data-type="edge-label"] {
+  fill: var(--gray-700);
+  font-weight: 600;
+}
+
 .graph-node text {
   font-size: 11px;
   font-weight: 500;