feat: labels

frontend/src/routes/BrowseView.tsx

@@ -117,14 +117,29 @@ export default function BrowseView() {
       }
     }
 
+    const rect = container.getBoundingClientRect();
+    const pad = 8;
+
     for (let i = 0; i < nClusters; i++) {
       const x = positions[i * 2];
       const y = positions[i * 2 + 1];
       if (x === undefined || y === undefined) continue;
       const screen = graph.spaceToScreenPosition([x, y]);
       const div = labelDivsRef.current[i]!;
-      div.style.left = `${screen[0]}px`;
-      div.style.top = `${screen[1]}px`;
+
+      // Measure label so we can clamp within container
+      const lw = div.offsetWidth;
+      const lh = div.offsetHeight;
+      // Default transform is translate(-50%, -100%), so anchor is center-bottom
+      let left = screen[0] - lw / 2;
+      let top = screen[1] - lh;
+      // Clamp to container bounds
+      left = Math.max(pad, Math.min(left, rect.width - lw - pad));
+      top = Math.max(pad, Math.min(top, rect.height - lh - pad));
+
+      div.style.transform = "none";
+      div.style.left = `${left}px`;
+      div.style.top = `${top}px`;
     }
   }, []);
 
@@ -431,7 +446,7 @@ export default function BrowseView() {
       {/* Hover label */}
       {hoveredLabel && (
         <div className="absolute pointer-events-none px-2 py-0.5 bg-popover border border-border rounded text-xs font-mono text-foreground whitespace-nowrap"
-          style={{ left: hoveredLabel.x + 12, top: hoveredLabel.y - 10, boxShadow: "0 2px 8px rgba(0,0,0,0.3)" }}>
+          style={{ left: Math.min(hoveredLabel.x + 12, (containerRef.current?.offsetWidth ?? 9999) - 160), top: Math.max(8, hoveredLabel.y - 10), boxShadow: "0 2px 8px rgba(0,0,0,0.3)" }}>
           {hoveredLabel.text}
         </div>
       )}