feat(rdata): traversible Data Cloud — click-to-focus graph navigation

Single-click module to zoom into cluster with smooth camera animation,
revealing doc labels. Double-click to open in new tab. Breadcrumb bar
for back-navigation. Non-focused nodes dim to 15% for context.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

modules/rdata/components/folk-data-cloud.ts

@@ -3,8 +3,10 @@
  *
  * Canvas 2D with perspective-projected 3D force simulation.
  * Three-tier hierarchy: Space → Module → Document nodes.
- * Click space to collapse/expand, click module/doc to open in new tab.
+ * Click space to collapse/expand.
- * Drag to orbit, scroll to zoom.
+ * Single-click module to focus/zoom into cluster; double-click to open in new tab.
+ * Single-click doc to select & show detail; double-click to open in new tab.
+ * Drag to orbit, scroll to zoom. Breadcrumb bar for navigation.
  */
 
 import { startPresenceHeartbeat } from '../../../shared/collab-presence';
@@ -122,16 +124,32 @@ class FolkDataCloud extends HTMLElement {
 	private camDist = 500;
 	private rotX = 0.3;  // pitch
 	private rotY = 0.0;  // yaw
+	private camOffsetX = 0;
+	private camOffsetY = 0;
+
+	// Camera animation targets
+	private targetCamDist = 500;
+	private targetRotX = 0.3;
+	private targetRotY = 0.0;
+	private targetOffsetX = 0;
+	private targetOffsetY = 0;
+
+	// Focus state
+	private focusedNodeId: string | null = null;
+	private selectedNodeId: string | null = null;
+	private breadcrumbRects: { x: number; y: number; w: number; h: number; action: 'all' | 'space' }[] = [];
 
 	// Interaction
 	private dragging = false;
 	private dragStartX = 0;
 	private dragStartY = 0;
+	private dragMoved = false;
 	private dragRotX = 0;
 	private dragRotY = 0;
 	private hoveredNode: Node3D | null = null;
 	private tooltipX = 0;
 	private tooltipY = 0;
+	private clickTimer: ReturnType<typeof setTimeout> | null = null;
 
 	// Animation
 	private animFrame = 0;
@@ -155,7 +173,6 @@ class FolkDataCloud extends HTMLElement {
 
 		this.shadow.innerHTML = `<style>${styles()}</style>
 			<div class="dc">
-				<div class="dc-banner" style="display:none">Sign in to see your data cloud</div>
 				<div class="dc-loading">Loading your data cloud…</div>
 				<canvas class="dc-canvas"></canvas>
 				<div class="dc-tooltip" style="display:none"></div>
@@ -254,10 +271,6 @@ class FolkDataCloud extends HTMLElement {
 		this.loading = false;
 		const loadingEl = this.shadow.querySelector('.dc-loading') as HTMLElement;
 		if (loadingEl) loadingEl.style.display = 'none';
-		if (this.isDemo) {
-			const banner = this.shadow.querySelector('.dc-banner') as HTMLElement;
-			if (banner) banner.style.display = 'block';
-		}
 		this.buildGraph();
 		this.renderLegend();
 		this.settled = false;
@@ -524,8 +537,8 @@ class FolkDataCloud extends HTMLElement {
 			const d = this.camDist + z2;
 			const scale = d > 50 ? FOV / d : FOV / 50;
 
-			n.px = cx + x1 * scale;
+			n.px = cx + x1 * scale + this.camOffsetX;
-			n.py = cy + y2 * scale;
+			n.py = cy + y2 * scale + this.camOffsetY;
 			n.pr = n.baseRadius * scale;
 			n.depth = z2;
 		}
@@ -545,6 +558,15 @@ class FolkDataCloud extends HTMLElement {
 		ctx.fillStyle = bg;
 		ctx.fillRect(0, 0, w, h);
 
+		// Focus-mode helpers
+		const focused = this.focusedNodeId;
+		const focusedNode = focused ? this.nodeMap.get(focused) : null;
+		const isFocusChild = (n: Node3D) => focused && (n.id === focused || n.parentId === focused);
+		const isFocusFamily = (n: Node3D) => {
+			if (!focused || !focusedNode) return false;
+			return n.id === focused || n.parentId === focused || n.id === focusedNode.parentId;
+		};
+
 		// Draw edges
 		for (const e of this.edges) {
 			const a = this.nodeMap.get(e.from);
@@ -553,7 +575,10 @@ class FolkDataCloud extends HTMLElement {
 
 			const avgDepth = (a.depth + b.depth) / 2;
 			const depthFade = Math.max(0.03, Math.min(0.4, 1 - (avgDepth + this.camDist) / (this.camDist * 2.5)));
-			const alpha = e.style === 'faint' ? depthFade * 0.3 : e.style === 'dotted' ? depthFade * 0.5 : depthFade;
+			let alpha = e.style === 'faint' ? depthFade * 0.3 : e.style === 'dotted' ? depthFade * 0.5 : depthFade;
+
+			// Dim non-focused edges
+			if (focused && !isFocusFamily(a) && !isFocusFamily(b)) alpha *= 0.15;
 
 			ctx.beginPath();
 			ctx.strokeStyle = e.color;
@@ -577,7 +602,8 @@ class FolkDataCloud extends HTMLElement {
 			const px = a.px + (b.px - a.px) * p.t;
 			const py = a.py + (b.py - a.py) * p.t;
 			const avgDepth = (a.depth + b.depth) / 2;
-			const depthAlpha = Math.max(0.1, Math.min(0.7, 1 - (avgDepth + this.camDist) / (this.camDist * 2.5)));
+			let depthAlpha = Math.max(0.1, Math.min(0.7, 1 - (avgDepth + this.camDist) / (this.camDist * 2.5)));
+			if (focused && !isFocusFamily(a) && !isFocusFamily(b)) depthAlpha *= 0.15;
 			ctx.beginPath();
 			ctx.arc(px, py, 1.5, 0, Math.PI * 2);
 			ctx.fillStyle = p.edge.color;
@@ -606,6 +632,9 @@ class FolkDataCloud extends HTMLElement {
 			const depthFade = Math.max(0.15, Math.min(1.0, 1 - (n.depth + this.camDist * 0.3) / (this.camDist * 1.8)));
 			const isHovered = this.hoveredNode?.id === n.id;
 			const isConnected = this.hoveredNode && hoveredEdges.has(n.id);
+			const isSelected = this.selectedNodeId === n.id;
+			const inFocus = isFocusFamily(n);
+			const focusDim = focused && !inFocus ? 0.15 : 1;
 
 			// Glow for space nodes
 			if (n.type === 'space') {
@@ -613,7 +642,7 @@ class FolkDataCloud extends HTMLElement {
 				glow.addColorStop(0, n.color + '40');
 				glow.addColorStop(1, n.color + '00');
 				ctx.fillStyle = glow;
-				ctx.globalAlpha = depthFade * (isHovered ? 1 : 0.6);
+				ctx.globalAlpha = depthFade * (isHovered ? 1 : 0.6) * focusDim;
 				ctx.beginPath();
 				ctx.arc(n.px, n.py, n.pr * 2.5, 0, Math.PI * 2);
 				ctx.fill();
@@ -621,7 +650,7 @@ class FolkDataCloud extends HTMLElement {
 
 			// Node circle
 			const fillAlpha = n.type === 'doc' ? 0.6 : n.type === 'module' ? 0.5 : 0.4;
-			const nodeAlpha = depthFade * (isHovered ? 1 : (isConnected ? 0.9 : fillAlpha));
+			const nodeAlpha = depthFade * (isHovered || isSelected ? 1 : (isConnected ? 0.9 : fillAlpha)) * focusDim;
 			ctx.beginPath();
 			ctx.arc(n.px, n.py, n.pr, 0, Math.PI * 2);
 			ctx.fillStyle = n.color;
@@ -629,9 +658,9 @@ class FolkDataCloud extends HTMLElement {
 			ctx.fill();
 
 			// Stroke
-			ctx.strokeStyle = isHovered ? '#ffffff' : n.color;
+			ctx.strokeStyle = isHovered || isSelected ? '#ffffff' : n.color;
-			ctx.lineWidth = isHovered ? 2.5 : (n.type === 'space' ? 1.8 : 1);
+			ctx.lineWidth = isHovered || isSelected ? 2.5 : (n.type === 'space' ? 1.8 : 1);
-			ctx.globalAlpha = depthFade * (isHovered ? 1 : 0.8);
+			ctx.globalAlpha = depthFade * (isHovered || isSelected ? 1 : 0.8) * focusDim;
 			ctx.stroke();
 
 			ctx.globalAlpha = 1;
@@ -642,14 +671,14 @@ class FolkDataCloud extends HTMLElement {
 				ctx.font = `600 ${Math.max(9, Math.min(12, n.pr * 0.7))}px system-ui, sans-serif`;
 				ctx.fillStyle = '#ffffff';
 				ctx.textAlign = 'center';
-				ctx.globalAlpha = depthFade;
+				ctx.globalAlpha = depthFade * focusDim;
 				ctx.fillText(label, n.px, n.py + n.pr + 14);
 				ctx.globalAlpha = 1;
 			} else if (n.type === 'module' && n.pr > 4) {
 				ctx.font = `${Math.max(8, Math.min(14, n.pr * 1.1))}px system-ui, sans-serif`;
 				ctx.textAlign = 'center';
 				ctx.textBaseline = 'middle';
-				ctx.globalAlpha = depthFade;
+				ctx.globalAlpha = depthFade * focusDim;
 				ctx.fillStyle = '#ffffff';
 				ctx.fillText(n.icon, n.px, n.py);
 				if (n.pr > 7) {
@@ -659,9 +688,24 @@ class FolkDataCloud extends HTMLElement {
 				}
 				ctx.textBaseline = 'alphabetic';
 				ctx.globalAlpha = 1;
+			} else if (n.type === 'doc' && focused && isFocusChild(n)) {
+				// Show doc title labels when parent module is focused
+				ctx.font = `500 ${Math.max(8, Math.min(11, n.pr * 0.9))}px system-ui, sans-serif`;
+				ctx.textAlign = 'center';
+				ctx.fillStyle = 'rgba(255,255,255,0.85)';
+				ctx.globalAlpha = depthFade;
+				ctx.fillText(truncate(n.label, 18), n.px, n.py + n.pr + 12);
+				ctx.globalAlpha = 1;
 			}
 		}
 
+		// Draw breadcrumb bar when focused
+		if (focusedNode) {
+			this.drawBreadcrumb(ctx, focusedNode, w);
+		} else {
+			this.breadcrumbRects = [];
+		}
+
 		// Tooltip
 		if (this.hoveredNode && !this.dragging) {
 			this.showTooltip(this.hoveredNode);
@@ -670,6 +714,74 @@ class FolkDataCloud extends HTMLElement {
 		}
 	}
 
+	private drawBreadcrumb(ctx: CanvasRenderingContext2D, focusedNode: Node3D, w: number) {
+		this.breadcrumbRects = [];
+		const barH = 28;
+		const barY = 8;
+		const padX = 12;
+
+		// Build segments: ☁ All > {SpaceName} > {ModuleName}
+		const spaceNode = focusedNode.parentId ? this.nodeMap.get(focusedNode.parentId) : null;
+		const segments = ['☁ All'];
+		if (spaceNode) segments.push(spaceNode.label);
+		segments.push(`${focusedNode.icon} ${focusedNode.label}`);
+
+		// Measure total width
+		ctx.font = '600 11px system-ui, sans-serif';
+		const sepW = ctx.measureText(' › ').width;
+		const segWidths = segments.map(s => ctx.measureText(s).width);
+		const totalW = segWidths.reduce((a, b) => a + b, 0) + sepW * (segments.length - 1) + padX * 2;
+		const barX = (w - totalW) / 2;
+
+		// Background pill
+		ctx.fillStyle = 'rgba(0, 0, 0, 0.6)';
+		ctx.globalAlpha = 1;
+		ctx.beginPath();
+		const r = barH / 2;
+		ctx.moveTo(barX + r, barY);
+		ctx.lineTo(barX + totalW - r, barY);
+		ctx.arcTo(barX + totalW, barY, barX + totalW, barY + r, r);
+		ctx.arcTo(barX + totalW, barY + barH, barX + totalW - r, barY + barH, r);
+		ctx.lineTo(barX + r, barY + barH);
+		ctx.arcTo(barX, barY + barH, barX, barY + barH - r, r);
+		ctx.arcTo(barX, barY, barX + r, barY, r);
+		ctx.fill();
+
+		// Border
+		ctx.strokeStyle = 'rgba(255,255,255,0.15)';
+		ctx.lineWidth = 1;
+		ctx.stroke();
+
+		// Draw text segments
+		let x = barX + padX;
+		const textY = barY + barH / 2 + 4;
+		for (let i = 0; i < segments.length; i++) {
+			const isClickable = i < segments.length - 1; // All and Space are clickable
+			const isLast = i === segments.length - 1;
+
+			ctx.fillStyle = isLast ? '#ffffff' : 'rgba(140, 180, 255, 0.9)';
+			ctx.globalAlpha = 1;
+			ctx.font = isLast ? '600 11px system-ui, sans-serif' : '500 11px system-ui, sans-serif';
+			ctx.textAlign = 'left';
+			ctx.fillText(segments[i], x, textY);
+
+			// Store clickable rect for hit detection
+			if (isClickable) {
+				this.breadcrumbRects.push({
+					x, y: barY, w: segWidths[i], h: barH,
+					action: i === 0 ? 'all' : 'space',
+				});
+			}
+
+			x += segWidths[i];
+			if (i < segments.length - 1) {
+				ctx.fillStyle = 'rgba(255,255,255,0.3)';
+				ctx.fillText(' › ', x, textY);
+				x += sepW;
+			}
+		}
+	}
+
 	// ── Animation loop ──
 
 	private tick = () => {
@@ -680,6 +792,22 @@ class FolkDataCloud extends HTMLElement {
 			this.simulate();
 		}
 
+		// Camera lerp (smooth spring animation toward targets)
+		const LERP = 0.08;
+		let camMoving = false;
+		const lerpField = (cur: number, tgt: number): [number, boolean] => {
+			const delta = tgt - cur;
+			if (Math.abs(delta) < 0.01) return [tgt, false];
+			return [cur + delta * LERP, true];
+		};
+		let v: number; let m: boolean;
+		[v, m] = lerpField(this.camDist, this.targetCamDist); this.camDist = v; camMoving ||= m;
+		[v, m] = lerpField(this.rotX, this.targetRotX); this.rotX = v; camMoving ||= m;
+		[v, m] = lerpField(this.rotY, this.targetRotY); this.rotY = v; camMoving ||= m;
+		[v, m] = lerpField(this.camOffsetX, this.targetOffsetX); this.camOffsetX = v; camMoving ||= m;
+		[v, m] = lerpField(this.camOffsetY, this.targetOffsetY); this.camOffsetY = v; camMoving ||= m;
+		if (camMoving) this.settled = false;
+
 		// Animate particles
 		for (const p of this.particles) {
 			p.t += p.speed;
@@ -696,10 +824,11 @@ class FolkDataCloud extends HTMLElement {
 	private attachInteraction() {
 		this.canvas.addEventListener('mousedown', (e) => {
 			this.dragging = true;
+			this.dragMoved = false;
 			this.dragStartX = e.clientX;
 			this.dragStartY = e.clientY;
-			this.dragRotX = this.rotX;
+			this.dragRotX = this.targetRotX;
-			this.dragRotY = this.rotY;
+			this.dragRotY = this.targetRotY;
 			this.canvas.style.cursor = 'grabbing';
 		});
 
@@ -708,7 +837,7 @@ class FolkDataCloud extends HTMLElement {
 
 		this.canvas.addEventListener('wheel', (e) => {
 			e.preventDefault();
-			this.camDist = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, this.camDist + e.deltaY * 0.5));
+			this.targetCamDist = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, this.targetCamDist + e.deltaY * 0.5));
 			this.settled = false;
 		}, { passive: false });
 
@@ -722,7 +851,6 @@ class FolkDataCloud extends HTMLElement {
 
 			let found: Node3D | null = null;
 			let bestDist = Infinity;
-			// Check in reverse depth order (front first)
 			const visible = this.nodes.filter(n => !n.hidden);
 			visible.sort((a, b) => a.depth - b.depth);
 			for (const n of visible) {
@@ -738,17 +866,51 @@ class FolkDataCloud extends HTMLElement {
 			this.canvas.style.cursor = found ? 'pointer' : 'grab';
 		});
 
+		// Single click — focus module, select doc, collapse space, breadcrumb, or unfocus
 		this.canvas.addEventListener('click', (e) => {
-			if (!this.hoveredNode) return;
+			if (this.dragMoved) return;
-			const n = this.hoveredNode;
 
-			if (n.type === 'space') {
+			// Check breadcrumb hit first
-				this.toggleCollapse(n);
+			const rect = this.canvas.getBoundingClientRect();
-			} else {
+			const mx = e.clientX - rect.left;
-				const space = n.space || this.space;
+			const my = e.clientY - rect.top;
-				const modPath = n.modId ? (n.modId.startsWith('r') ? n.modId : `r${n.modId}`) : 'rspace';
+			for (const br of this.breadcrumbRects) {
-				window.open(rspaceNavUrl(space, modPath), '_blank');
+				if (mx >= br.x && mx <= br.x + br.w && my >= br.y && my <= br.y + br.h) {
+					this.unfocus();
+					return;
+				}
 			}
+
+			// Debounce for double-click detection
+			if (this.clickTimer) { clearTimeout(this.clickTimer); this.clickTimer = null; }
+
+			const n = this.hoveredNode;
+			this.clickTimer = setTimeout(() => {
+				this.clickTimer = null;
+				if (!n) {
+					// Click empty space → exit focus
+					if (this.focusedNodeId) this.unfocus();
+					return;
+				}
+				if (n.type === 'space') {
+					this.toggleCollapse(n);
+				} else if (n.type === 'module') {
+					this.focusOnNode(n);
+				} else if (n.type === 'doc') {
+					this.selectedNodeId = this.selectedNodeId === n.id ? null : n.id;
+					this.settled = false;
+				}
+			}, 250);
+		});
+
+		// Double click — open in new tab
+		this.canvas.addEventListener('dblclick', (e) => {
+			if (this.clickTimer) { clearTimeout(this.clickTimer); this.clickTimer = null; }
+			const n = this.hoveredNode;
+			if (!n || n.type === 'space') return;
+			const space = n.space || this.space;
+			const modPath = n.modId ? (n.modId.startsWith('r') ? n.modId : `r${n.modId}`) : 'rspace';
+			window.open(rspaceNavUrl(space, modPath), '_blank');
 		});
 
 		// Touch support
@@ -757,9 +919,10 @@ class FolkDataCloud extends HTMLElement {
 			if (e.touches.length === 1) {
 				const t = e.touches[0];
 				touchStart = { x: t.clientX, y: t.clientY, dist: this.camDist };
-				this.dragRotX = this.rotX;
+				this.dragRotX = this.targetRotX;
-				this.dragRotY = this.rotY;
+				this.dragRotY = this.targetRotY;
 				this.dragging = true;
+				this.dragMoved = false;
 			} else if (e.touches.length === 2) {
 				const dx = e.touches[1].clientX - e.touches[0].clientX;
 				const dy = e.touches[1].clientY - e.touches[0].clientY;
@@ -770,18 +933,19 @@ class FolkDataCloud extends HTMLElement {
 
 		this.canvas.addEventListener('touchmove', (e) => {
 			if (!touchStart) return;
+			this.dragMoved = true;
 			if (e.touches.length === 1) {
 				const t = e.touches[0];
-				this.rotY = this.dragRotY + (t.clientX - touchStart.x) * 0.005;
+				this.targetRotY = this.dragRotY + (t.clientX - touchStart.x) * 0.005;
-				this.rotX = this.dragRotX + (t.clientY - touchStart.y) * 0.005;
+				this.targetRotX = this.dragRotX + (t.clientY - touchStart.y) * 0.005;
-				this.rotX = Math.max(-Math.PI / 2, Math.min(Math.PI / 2, this.rotX));
+				this.targetRotX = Math.max(-Math.PI / 2, Math.min(Math.PI / 2, this.targetRotX));
 				this.settled = false;
 			} else if (e.touches.length === 2) {
 				const dx = e.touches[1].clientX - e.touches[0].clientX;
 				const dy = e.touches[1].clientY - e.touches[0].clientY;
 				const pinchDist = Math.sqrt(dx * dx + dy * dy);
 				const ratio = touchStart.dist / pinchDist;
-				this.camDist = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, 500 * ratio));
+				this.targetCamDist = Math.max(MIN_ZOOM, Math.min(MAX_ZOOM, 500 * ratio));
 				this.settled = false;
 			}
 			e.preventDefault();
@@ -795,9 +959,15 @@ class FolkDataCloud extends HTMLElement {
 
 	private onMouseMove = (e: MouseEvent) => {
 		if (!this.dragging) return;
-		this.rotY = this.dragRotY + (e.clientX - this.dragStartX) * 0.005;
+		const dx = e.clientX - this.dragStartX;
-		this.rotX = this.dragRotX + (e.clientY - this.dragStartY) * 0.005;
+		const dy = e.clientY - this.dragStartY;
-		this.rotX = Math.max(-Math.PI / 2, Math.min(Math.PI / 2, this.rotX));
+		if (Math.abs(dx) > 3 || Math.abs(dy) > 3) this.dragMoved = true;
+		this.targetRotY = this.dragRotY + dx * 0.005;
+		this.targetRotX = this.dragRotX + dy * 0.005;
+		this.targetRotX = Math.max(-Math.PI / 2, Math.min(Math.PI / 2, this.targetRotX));
+		// Snap rotation immediately during drag for responsiveness
+		this.rotX = this.targetRotX;
+		this.rotY = this.targetRotY;
 		this.settled = false;
 	};
 
@@ -835,6 +1005,56 @@ class FolkDataCloud extends HTMLElement {
 		}
 	}
 
+	// ── Focus / Unfocus ──
+
+	private focusOnNode(node: Node3D) {
+		this.focusedNodeId = node.id;
+		this.selectedNodeId = null;
+
+		// Target zoom in
+		this.targetCamDist = 250;
+
+		// Compute where node projects at target cam dist + current rotation (without offsets)
+		const cosX = Math.cos(this.rotX), sinX = Math.sin(this.rotX);
+		const cosY = Math.cos(this.rotY), sinY = Math.sin(this.rotY);
+		const x1 = node.x * cosY - node.z * sinY;
+		const z1 = node.x * sinY + node.z * cosY;
+		const y2 = node.y * cosX - z1 * sinX;
+		const z2 = node.y * sinX + z1 * cosX;
+		const d = this.targetCamDist + z2;
+		const scale = d > 50 ? FOV / d : FOV / 50;
+		this.targetOffsetX = -x1 * scale;
+		this.targetOffsetY = -y2 * scale;
+
+		// Enlarge focused module's doc children
+		for (const n of this.nodes) {
+			if (n.type === 'doc') {
+				n.baseRadius = n.parentId === node.id ? 8 : 5;
+			}
+		}
+
+		this.settled = false;
+		this.frameCount = 0;
+	}
+
+	private unfocus() {
+		this.focusedNodeId = null;
+		this.selectedNodeId = null;
+
+		// Reset camera to defaults
+		this.targetCamDist = 500;
+		this.targetOffsetX = 0;
+		this.targetOffsetY = 0;
+
+		// Restore doc node radii
+		for (const n of this.nodes) {
+			if (n.type === 'doc') n.baseRadius = 5;
+		}
+
+		this.settled = false;
+		this.frameCount = 0;
+	}
+
 	// ── Tooltip ──
 
 	private showTooltip(n: Node3D) {
@@ -848,9 +1068,11 @@ class FolkDataCloud extends HTMLElement {
 			text = `<b>${esc(n.label)}</b><br>${modCount} modules, ${docCount} docs<br><em>Click to ${n.collapsed ? 'expand' : 'collapse'}</em>`;
 		} else if (n.type === 'module') {
 			const docCount = this.nodes.filter(nd => nd.parentId === n.id && nd.type === 'doc').length;
-			text = `<b>${n.icon} ${esc(n.label)}</b><br>${docCount} documents<br><em>Click to open</em>`;
+			text = `<b>${n.icon} ${esc(n.label)}</b><br>${docCount} documents<br><em>Click to focus · Double-click to open</em>`;
 		} else {
-			text = `<b>${esc(n.label)}</b><br><em>Click to open in ${n.modId || 'module'}</em>`;
+			const tags = this.docs.find(d => `doc:${d.docId}` === n.id)?.tags;
+			const tagStr = tags?.length ? `<br>Tags: ${tags.map(t => esc(t)).join(', ')}` : '';
+			text = `<b>${esc(n.label)}</b><br>${esc(n.modId || 'module')}${tagStr}<br><em>Click to select · Double-click to open</em>`;
 		}
 
 		tip.innerHTML = text;
@@ -898,7 +1120,7 @@ class FolkDataCloud extends HTMLElement {
 					<span class="dc-legend__item">${m.icon} ${esc(m.name)}</span>
 				`).join('')}
 			</div>
-			<div class="dc-legend__hint">Drag to orbit · Scroll to zoom · Click space to collapse · Click module/doc to open</div>
+			<div class="dc-legend__hint">Drag to orbit · Scroll to zoom · Click module to focus · Double-click to open</div>
 		`;
 	}
 }
@@ -929,12 +1151,6 @@ function styles(): string {
 			display: flex; flex-direction: column; align-items: center;
 		}
 
-		.dc-banner {
-			width: 100%; text-align: center; padding: 0.5rem;
-			background: rgba(234, 179, 8, 0.1); border: 1px solid rgba(234, 179, 8, 0.3);
-			border-radius: 8px; color: #eab308; font-size: 0.85rem; margin-bottom: 0.5rem;
-		}
-
 		.dc-loading {
 			text-align: center; padding: 3rem 1rem;
 			color: rgba(255,255,255,0.5); font-size: 0.9rem;