feat(graph): add cross-team ghost nodes and task card improvements

- Cross-team messages now show ghost nodes (dashed hexagons) for external teams
- Ghost nodes have purple color, link icon, and connect to lead via message edge
- Particles flow between ghost node and lead with cross-team message labels
- Cross-team popover shows external team name
- Task click opens full KanbanTaskCard with glow effects and action buttons
- All kanban task actions wired through CustomEvent to TeamDetailView

packages/agent-graph/src/canvas/draw-agents.ts

@@ -106,6 +106,69 @@ export function drawAgents(
   }
 }
 
+/**
+ * Draw cross-team ghost nodes — semi-transparent dashed hexagons.
+ */
+export function drawCrossTeamNodes(
+  ctx: CanvasRenderingContext2D,
+  nodes: GraphNode[],
+  time: number,
+  selectedId: string | null,
+  hoveredId: string | null,
+): void {
+  for (const node of nodes) {
+    if (node.kind !== 'crossteam') continue;
+
+    const x = node.x ?? 0;
+    const y = node.y ?? 0;
+    const r = NODE.radiusCrossTeam;
+    const color = node.color ?? '#cc88ff';
+    const isSelected = node.id === selectedId;
+    const isHovered = node.id === hoveredId;
+
+    ctx.save();
+    ctx.globalAlpha = isHovered ? 0.7 : 0.5;
+
+    // Subtle glow
+    const glowR = r + AGENT_DRAW.glowPadding;
+    const sprite = getAgentGlowSprite(color, r, glowR);
+    ctx.drawImage(sprite, x - glowR, y - glowR);
+
+    // Dashed hexagon body
+    drawHexagon(ctx, x, y, r);
+    ctx.fillStyle = 'rgba(10, 15, 40, 0.4)';
+    ctx.fill();
+
+    ctx.setLineDash([4, 4]);
+    ctx.strokeStyle = hexWithAlpha(color, 0.6);
+    ctx.lineWidth = 1.5;
+    ctx.stroke();
+    ctx.setLineDash([]);
+
+    // Link icon (two arrows ↔) in center
+    ctx.font = 'bold 12px sans-serif';
+    ctx.textAlign = 'center';
+    ctx.textBaseline = 'middle';
+    ctx.fillStyle = hexWithAlpha(color, 0.8);
+    ctx.fillText('\u{2194}', x, y); // ↔
+
+    // Label below
+    ctx.globalAlpha = 0.7;
+    ctx.font = '8px monospace';
+    ctx.textAlign = 'center';
+    ctx.textBaseline = 'top';
+    ctx.fillStyle = hexWithAlpha(color, 0.7);
+    ctx.fillText(node.label, x, y + r + 6);
+
+    // Selection ring
+    if (isSelected) {
+      drawSelectionRing(ctx, x, y, r, color);
+    }
+
+    ctx.restore();
+  }
+}
+
 // ─── Private Helpers ────────────────────────────────────────────────────────
 
 function getNodeOpacity(node: GraphNode): number {

packages/agent-graph/src/canvas/hit-detection.ts

@@ -49,8 +49,9 @@ export function findNodeAt(
         }
         break;
       }
-      case 'process': {
-        const r = NODE.radiusProcess + HIT_DETECTION.agentPadding;
+      case 'process':
+      case 'crossteam': {
+        const r = (node.kind === 'crossteam' ? NODE.radiusCrossTeam : NODE.radiusProcess) + HIT_DETECTION.agentPadding;
         const dx = worldX - x;
         const dy = worldY - y;
         if (dx * dx + dy * dy <= r * r) {

packages/agent-graph/src/constants/canvas-constants.ts

@@ -61,6 +61,8 @@ export const NODE = {
   radiusMember: 24,
   /** Process node radius */
   radiusProcess: 14,
+  /** Cross-team ghost node radius */
+  radiusCrossTeam: 20,
 } as const;
 
 // ─── Task pill dimensions ───────────────────────────────────────────────────

packages/agent-graph/src/ports/types.ts

@@ -5,7 +5,7 @@
 
 // ─── Node Kinds ──────────────────────────────────────────────────────────────
 
-export type GraphNodeKind = 'lead' | 'member' | 'task' | 'process';
+export type GraphNodeKind = 'lead' | 'member' | 'task' | 'process' | 'crossteam';
 
 export type GraphNodeState =
   | 'idle'
@@ -161,4 +161,5 @@ export type GraphDomainRef =
   | { kind: 'lead'; teamName: string; memberName: string }
   | { kind: 'member'; teamName: string; memberName: string }
   | { kind: 'task'; teamName: string; taskId: string }
-  | { kind: 'process'; teamName: string; processId: string };
+  | { kind: 'process'; teamName: string; processId: string }
+  | { kind: 'crossteam'; teamName: string; externalTeamName: string };

packages/agent-graph/src/strategies/index.ts

@@ -14,6 +14,7 @@ const STRATEGIES: Record<GraphNodeKind, NodeRenderStrategy> = {
   member: new MemberStrategy(),
   task: new TaskStrategy(),
   process: new ProcessStrategy(),
+  crossteam: new ProcessStrategy(), // Reuse process strategy (similar small node)
 };
 
 export function getNodeStrategy(kind: GraphNodeKind): NodeRenderStrategy {

packages/agent-graph/src/ui/GraphCanvas.tsx

@@ -11,7 +11,7 @@ import type { GraphNode, GraphEdge, GraphParticle } from '../ports/types';
 import { drawBackground, createDepthParticles, updateDepthParticles, type DepthParticle } from '../canvas/background-layer';
 import { drawEdges } from '../canvas/draw-edges';
 import { drawParticles } from '../canvas/draw-particles';
-import { drawAgents } from '../canvas/draw-agents';
+import { drawAgents, drawCrossTeamNodes } from '../canvas/draw-agents';
 import { drawTasks, drawColumnHeaders } from '../canvas/draw-tasks';
 import { drawProcesses } from '../canvas/draw-processes';
 import { drawEffects, type VisualEffect } from '../canvas/draw-effects';
@@ -209,6 +209,7 @@ export const GraphCanvas = forwardRef<GraphCanvasHandle, GraphCanvasProps>(funct
 
       // 2c. Visible nodes only (back to front: process → task → member/lead)
       drawProcesses(ctx, visibleNodes, state.time, state.selectedNodeId, state.hoveredNodeId);
+      drawCrossTeamNodes(ctx, visibleNodes, state.time, state.selectedNodeId, state.hoveredNodeId);
       drawColumnHeaders(ctx, KanbanLayoutEngine.zones);
       drawTasks(ctx, visibleNodes, state.time, state.selectedNodeId, state.hoveredNodeId);
       drawAgents(ctx, visibleNodes, state.time, state.selectedNodeId, state.hoveredNodeId);

src/renderer/components/team/TeamDetailView.tsx

@@ -1584,7 +1584,12 @@ export const TeamDetailView = ({
                     });
                   }}
                 >
-                  <Network size={12} />
+                  <span className="relative">
+                    <Network size={12} />
+                    <span className="absolute -right-3.5 -top-2.5 rounded-sm bg-emerald-500/20 px-0.5 py-px text-[7px] font-bold leading-none text-emerald-400">
+                      NEW
+                    </span>
+                  </span>
                   Graph
                 </Button>
                 <Button

src/renderer/features/agent-graph/adapters/TeamGraphAdapter.ts

@@ -9,6 +9,7 @@
 
 import { getUnreadCount } from '@renderer/services/commentReadStorage';
 import { agentAvatarUrl } from '@renderer/utils/memberHelpers';
+import { stripCrossTeamPrefix } from '@shared/constants/crossTeam';
 import { getInboxJsonType, isInboxNoiseMessage } from '@shared/utils/inboxNoise';
 import { isLeadMember } from '@shared/utils/leadDetection';
 
@@ -195,7 +196,15 @@ export class TeamGraphAdapter {
     );
     this.#buildTaskNodes(nodes, edges, teamData, teamName, commentReadState);
     this.#buildProcessNodes(nodes, edges, teamData, teamName);
-    this.#buildMessageParticles(particles, teamData.messages, teamName, leadId, leadName, edges);
+    this.#buildMessageParticles(
+      particles,
+      nodes,
+      teamData.messages,
+      teamName,
+      leadId,
+      leadName,
+      edges
+    );
     this.#buildCommentParticles(particles, teamData, teamName, leadId, leadName, edges);
 
     this.#cachedResult = {
@@ -518,6 +527,7 @@ export class TeamGraphAdapter {
 
   #buildMessageParticles(
     particles: GraphParticle[],
+    nodes: GraphNode[],
     messages: readonly InboxMessage[],
     teamName: string,
     leadId: string,
@@ -534,9 +544,18 @@ export class TeamGraphAdapter {
         const msgKey = TeamGraphAdapter.#getMessageParticleKey(msg);
         this.#seenMessageIds.add(msgKey);
       }
+      // Still create ghost nodes for cross-team (without particles)
+      for (const msg of ordered) {
+        if (msg.source === 'cross_team' || msg.source === 'cross_team_sent') {
+          TeamGraphAdapter.#ensureCrossTeamNode(nodes, edges, msg, teamName, leadId);
+        }
+      }
       return;
     }
 
+    // Track which ghost nodes we've already created this cycle
+    const seenGhostTeams = new Set<string>();
+
     // Subsequent calls: only create particles for messages not yet seen.
     for (const msg of ordered) {
       const msgKey = TeamGraphAdapter.#getMessageParticleKey(msg);
@@ -555,6 +574,42 @@ export class TeamGraphAdapter {
         continue; // skip shutdown_approved, teammate_terminated, shutdown_request
       }
 
+      // Cross-team messages: create ghost node + edge + particle
+      if (msg.source === 'cross_team' || msg.source === 'cross_team_sent') {
+        const ghostNodeId = TeamGraphAdapter.#ensureCrossTeamNode(
+          nodes,
+          edges,
+          msg,
+          teamName,
+          leadId
+        );
+        if (!ghostNodeId) continue;
+
+        const edgeId = edges.find(
+          (e) =>
+            (e.source === ghostNodeId && e.target === leadId) ||
+            (e.source === leadId && e.target === ghostNodeId)
+        )?.id;
+        if (!edgeId) continue;
+
+        // incoming = from external team → lead (reverse on lead→ghost edge)
+        // sent = from lead → external team (forward on lead→ghost edge)
+        const isIncoming = msg.source === 'cross_team';
+        const cleanText = stripCrossTeamPrefix(msg.text ?? '');
+        const label = TeamGraphAdapter.#buildParticleLabel(msg.summary ?? cleanText, 'inbox');
+
+        particles.push({
+          id: `particle:msg:${teamName}:${msgKey}`,
+          edgeId,
+          progress: 0,
+          kind: 'inbox_message',
+          color: '#cc88ff',
+          label,
+          reverse: !isIncoming, // ghost→lead edge: incoming = forward, sent = reverse
+        });
+        continue;
+      }
+
       const edgeId = TeamGraphAdapter.#resolveMessageEdge(msg, teamName, leadId, leadName, edges);
       if (!edgeId) continue;
 
@@ -584,6 +639,17 @@ export class TeamGraphAdapter {
         reverse: isFromTeammate,
       });
     }
+
+    // Also ensure ghost nodes exist for ALL cross-team messages (not just new ones)
+    for (const msg of ordered) {
+      if (msg.source === 'cross_team' || msg.source === 'cross_team_sent') {
+        const extTeam = TeamGraphAdapter.#extractExternalTeamName(msg.from ?? '');
+        if (extTeam && !seenGhostTeams.has(extTeam)) {
+          seenGhostTeams.add(extTeam);
+          TeamGraphAdapter.#ensureCrossTeamNode(nodes, edges, msg, teamName, leadId);
+        }
+      }
+    }
   }
 
   #buildCommentParticles(
@@ -769,6 +835,52 @@ export class TeamGraphAdapter {
     return `member:${teamName}:${name}`;
   }
 
+  /** Extract external team name from cross-team "from" field like "team-b.alice" */
+  static #extractExternalTeamName(from: string): string | null {
+    const dotIdx = from.indexOf('.');
+    if (dotIdx <= 0) return null;
+    return from.slice(0, dotIdx);
+  }
+
+  /** Create or find ghost node + edge for an external team. Returns ghost node ID. */
+  static #ensureCrossTeamNode(
+    nodes: GraphNode[],
+    edges: GraphEdge[],
+    msg: InboxMessage,
+    teamName: string,
+    leadId: string
+  ): string | null {
+    const extTeam = TeamGraphAdapter.#extractExternalTeamName(msg.from ?? '');
+    if (!extTeam) return null;
+
+    const ghostId = `crossteam:${extTeam}`;
+
+    // Create ghost node if not exists
+    if (!nodes.some((n) => n.id === ghostId)) {
+      nodes.push({
+        id: ghostId,
+        kind: 'crossteam',
+        label: extTeam,
+        state: 'active',
+        color: '#cc88ff',
+        domainRef: { kind: 'crossteam', teamName, externalTeamName: extTeam },
+      });
+    }
+
+    // Create edge ghost↔lead if not exists
+    const edgeId = `edge:crossteam:${ghostId}:${leadId}`;
+    if (!edges.some((e) => e.id === edgeId)) {
+      edges.push({
+        id: edgeId,
+        source: ghostId,
+        target: leadId,
+        type: 'message',
+      });
+    }
+
+    return ghostId;
+  }
+
   static #buildParticleLabel(
     text: string | undefined,
     kind: 'inbox' | 'comment',

src/renderer/features/agent-graph/ui/GraphNodePopover.tsx

@@ -111,6 +111,21 @@ export const GraphNodePopover = ({
     );
   }
 
+  // Cross-team ghost node
+  if (node.kind === 'crossteam') {
+    const extTeamName =
+      node.domainRef.kind === 'crossteam' ? node.domainRef.externalTeamName : node.label;
+    return (
+      <div className="min-w-[180px] rounded-lg border border-purple-500/30 bg-[var(--color-surface-raised)] p-3 shadow-xl">
+        <div className="flex items-center gap-2">
+          <span className="text-sm text-purple-400">{'\u{2194}'}</span>
+          <span className="font-mono text-xs font-bold text-purple-300">{extTeamName}</span>
+        </div>
+        <div className="mt-1 text-[10px] text-[var(--color-text-muted)]">External team</div>
+      </div>
+    );
+  }
+
   // Process
   return (
     <div className="min-w-[180px] max-w-[260px] rounded-lg border border-[var(--color-border)] bg-[var(--color-surface-raised)] p-3 shadow-xl">