feat(web/mazenet): render canvas — net boxes, node cards, bezier edges, topology loader

decnet_web/src/components/MazeNET/Canvas.tsx

@@ -0,0 +1,140 @@
+import React, { useMemo } from 'react';
+import NetBox from './NetBox';
+import NodeCard from './NodeCard';
+import type { Net, MazeNode, Edge } from './types';
+import type { Selection } from './Inspector';
+
+interface Props {
+  nets: Net[];
+  nodes: MazeNode[];
+  edges: Edge[];
+  selection: Selection;
+  setSelection: (s: Selection) => void;
+  pan?: { x: number; y: number };
+}
+
+const NODE_W = 140;
+const NODE_HEAD_H = 22;
+
+const Canvas: React.FC<Props> = ({ nets, nodes, edges, selection, setSelection, pan = { x: 0, y: 0 } }) => {
+  const netById = useMemo(() => new Map(nets.map((n) => [n.id, n])), [nets]);
+
+  const absPos = (node: MazeNode) => {
+    const net = netById.get(node.netId);
+    return { x: (net?.x ?? 0) + node.x, y: (net?.y ?? 0) + node.y };
+  };
+
+  /* nets touched by any edge */
+  const activeNetIds = useMemo(() => {
+    const nodeNet = new Map(nodes.map((n) => [n.id, n.netId]));
+    const ids = new Set<string>();
+    for (const e of edges) {
+      const a = nodeNet.get(e.from); const b = nodeNet.get(e.to);
+      if (a) ids.add(a); if (b) ids.add(b);
+    }
+    return ids;
+  }, [nodes, edges]);
+
+  const selNetId  = selection?.type === 'net'  ? selection.id : null;
+  const selNodeId = selection?.type === 'node' ? selection.id : null;
+  const selEdgeId = selection?.type === 'edge' ? selection.id : null;
+
+  return (
+    <div
+      className="maze-canvas-wrap"
+      onMouseDown={(e) => { if (e.target === e.currentTarget) setSelection(null); }}
+    >
+      <div className="maze-grid-bg">
+        <svg xmlns="http://www.w3.org/2000/svg">
+          <defs>
+            <pattern id="maze-grid-pat" x={pan.x} y={pan.y} width="40" height="40" patternUnits="userSpaceOnUse">
+              <path d="M 40 0 L 0 0 0 40" fill="none" stroke="var(--grid-line)" strokeWidth="1" />
+            </pattern>
+          </defs>
+          <rect width="100%" height="100%" fill="url(#maze-grid-pat)" />
+        </svg>
+      </div>
+
+      <div className="maze-pan-layer" style={{ transform: `translate(${pan.x}px, ${pan.y}px)` }}>
+        <svg className="maze-svg">
+          <defs>
+            <marker id="arrow-matrix" viewBox="0 0 10 10" refX="8" refY="5" markerWidth="6" markerHeight="6" orient="auto">
+              <path d="M0,0 L10,5 L0,10 z" fill="#00ff41" />
+            </marker>
+            <marker id="arrow-violet" viewBox="0 0 10 10" refX="8" refY="5" markerWidth="6" markerHeight="6" orient="auto">
+              <path d="M0,0 L10,5 L0,10 z" fill="#ee82ee" />
+            </marker>
+            <marker id="arrow-alert" viewBox="0 0 10 10" refX="8" refY="5" markerWidth="6" markerHeight="6" orient="auto">
+              <path d="M0,0 L10,5 L0,10 z" fill="#ff4141" />
+            </marker>
+          </defs>
+          {edges.map((e) => {
+            const from = nodes.find((n) => n.id === e.from);
+            const to   = nodes.find((n) => n.id === e.to);
+            if (!from || !to) return null;
+            const a = absPos(from); const b = absPos(to);
+            const x1 = a.x + NODE_W, y1 = a.y + NODE_HEAD_H;
+            const x2 = b.x,           y2 = b.y + NODE_HEAD_H;
+            const cx = (x1 + x2) / 2;
+            const d  = `M${x1},${y1} C${cx},${y1} ${cx},${y2} ${x2},${y2}`;
+            const klass  = e.traffic === 'hot' ? 'hot' : e.traffic === 'active' ? 'active' : '';
+            const marker = e.traffic === 'hot' ? 'arrow-alert' : e.traffic === 'active' ? 'arrow-violet' : 'arrow-matrix';
+            const isSel  = e.id === selEdgeId;
+            return (
+              <g key={e.id} style={{ pointerEvents: 'auto' }}
+                 onClick={(ev) => { ev.stopPropagation(); setSelection({ type: 'edge', id: e.id }); }}>
+                <path d={d} className={`maze-edge ${klass} maze-edge-dash`} markerEnd={`url(#${marker})`}
+                      style={{ strokeWidth: isSel ? 2.5 : 1.5 }} />
+                <path d={d} stroke="transparent" strokeWidth="12" fill="none" style={{ cursor: 'pointer' }} />
+                {e.label && (
+                  <text x={cx} y={(y1 + y2) / 2 - 6} textAnchor="middle"
+                        fill={e.traffic === 'hot' ? '#ff4141' : '#ee82ee'}
+                        fontSize="9" fontFamily="var(--font-mono)" letterSpacing="1">
+                    {e.label}
+                  </text>
+                )}
+              </g>
+            );
+          })}
+        </svg>
+
+        <div className="maze-nodes">
+          {nets.map((net) => {
+            const inactive = net.kind !== 'internet' && !activeNetIds.has(net.id);
+            return (
+              <NetBox
+                key={net.id}
+                net={net}
+                selected={net.id === selNetId}
+                dropTarget={false}
+                inactive={inactive}
+                onSelect={(id) => setSelection({ type: 'net', id })}
+              />
+            );
+          })}
+          {nodes.map((n) => {
+            const p = absPos(n);
+            return (
+              <NodeCard
+                key={n.id}
+                node={n}
+                absX={p.x}
+                absY={p.y}
+                selected={n.id === selNodeId}
+                onSelect={(id) => setSelection({ type: 'node', id })}
+              />
+            );
+          })}
+        </div>
+      </div>
+
+      <div className="maze-legend">
+        <div className="lg-row"><span className="lg-swatch" style={{ background: '#ff4141' }} /> HOT</div>
+        <div className="lg-row"><span className="lg-swatch" style={{ background: '#ee82ee' }} /> ACTIVE</div>
+        <div className="lg-row"><span className="lg-swatch" style={{ background: '#00ff41' }} /> IDLE</div>
+      </div>
+    </div>
+  );
+};
+
+export default Canvas;

decnet_web/src/components/MazeNET/MazeNET.tsx

@@ -1,7 +1,9 @@
 import React, { useEffect, useState } from 'react';
+import { useSearchParams } from 'react-router-dom';
 import { PanelRightOpen, PanelRightClose, RotateCcw, UploadCloud } from 'lucide-react';
 import './MazeNET.css';
 import Palette from './Palette';
+import Canvas from './Canvas';
 import Inspector from './Inspector';
 import type { Selection } from './Inspector';
 import { DEFAULT_SERVICES, DEMO_NETS, DEMO_NODES, DEMO_EDGES } from './data';
@@ -11,6 +13,8 @@ import { useMazeApi } from './useMazeApi';
 
 const MazeNET: React.FC = () => {
   const api = useMazeApi();
+  const [params] = useSearchParams();
+  const topologyId = params.get('topology');
 
   const [nets,  setNets]  = useState<Net[]>(DEMO_NETS);
   const [nodes, setNodes] = useState<MazeNode[]>(DEMO_NODES);
@@ -19,15 +23,40 @@ const MazeNET: React.FC = () => {
   const [selection, setSelection] = useState<Selection>(null);
   const [inspectorOpen, setInspectorOpen] = useState(true);
   const [services, setServices] = useState<ServiceDef[]>(DEFAULT_SERVICES);
+  const [loadErr, setLoadErr] = useState<string | null>(null);
 
+  /* Load service catalog from API (fall back to defaults if 401/offline). */
   useEffect(() => {
     let cancelled = false;
     api.getServices().then((s) => { if (!cancelled) setServices(s); }).catch(() => {});
     return () => { cancelled = true; };
   }, [api]);
 
+  /* If ?topology=<id> is present, hydrate from the real backend. */
+  useEffect(() => {
+    if (!topologyId) return;
+    let cancelled = false;
+    api.getTopology(topologyId)
+      .then((h) => {
+        if (cancelled) return;
+        setNets(h.nets); setNodes(h.nodes); setEdges(h.edges);
+        setSelection(null);
+        setLoadErr(null);
+      })
+      .catch((err) => {
+        if (!cancelled) setLoadErr(err?.message ?? 'topology load failed');
+      });
+    return () => { cancelled = true; };
+  }, [api, topologyId]);
+
   const onReset = () => {
+    if (topologyId) {
+      api.getTopology(topologyId).then((h) => {
+        setNets(h.nets); setNodes(h.nodes); setEdges(h.edges);
+      }).catch(() => {});
+    } else {
       setNets(DEMO_NETS); setNodes(DEMO_NODES); setEdges(DEMO_EDGES);
+    }
     setSelection(null);
   };
 
@@ -37,8 +66,10 @@ const MazeNET: React.FC = () => {
         <div>
           <h1>MAZENET</h1>
           <div className="maze-page-sub">
-            NETWORK OF NETWORKS · {nets.length} NETS · {nodes.length} NODES · {edges.length} PATHS ·{' '}
+            {topologyId ? `TOPOLOGY ${topologyId} · ` : 'DEMO · '}
+            {nets.length} NETS · {nodes.length} NODES · {edges.length} PATHS ·{' '}
             {pending.length > 0 ? `${pending.length} UNCOMMITTED` : 'LIVE'}
+            {loadErr && <span className="alert-text"> · {loadErr}</span>}
           </div>
         </div>
         <div className="maze-page-actions">
@@ -58,7 +89,7 @@ const MazeNET: React.FC = () => {
             type="button"
             className="maze-btn"
             disabled={pending.length === 0}
-            onClick={() => api.commit('', pending)}
+            onClick={() => api.commit(topologyId ?? '', pending)}
           >
             <UploadCloud size={12} /> COMMIT {pending.length > 0 ? `(${pending.length})` : ''}
           </button>
@@ -70,21 +101,13 @@ const MazeNET: React.FC = () => {
         style={{ gridTemplateColumns: inspectorOpen ? '240px 1fr 320px' : '240px 1fr' }}
       >
         <Palette services={services} />
-
-        <div className="maze-canvas-wrap">
-          <div className="maze-grid-bg">
-            <svg xmlns="http://www.w3.org/2000/svg">
-              <defs>
-                <pattern id="maze-grid-pat" x={0} y={0} width="40" height="40" patternUnits="userSpaceOnUse">
-                  <path d="M 40 0 L 0 0 0 40" fill="none" stroke="var(--grid-line)" strokeWidth="1" />
-                </pattern>
-              </defs>
-              <rect width="100%" height="100%" fill="url(#maze-grid-pat)" />
-            </svg>
-          </div>
-          <div className="maze-empty-hint">CANVAS COMES ONLINE IN STEP 4</div>
-        </div>
-
+        <Canvas
+          nets={nets}
+          nodes={nodes}
+          edges={edges}
+          selection={selection}
+          setSelection={setSelection}
+        />
         {inspectorOpen && (
           <Inspector
             selection={selection}

decnet_web/src/components/MazeNET/NetBox.tsx

@@ -0,0 +1,69 @@
+import React from 'react';
+import { Globe, GitMerge } from 'lucide-react';
+import type { Net } from './types';
+
+interface Props {
+  net: Net;
+  selected: boolean;
+  dropTarget: boolean;
+  inactive: boolean;
+  onSelect?: (id: string) => void;
+  children?: React.ReactNode;
+}
+
+const NetBox: React.FC<Props> = ({ net, selected, dropTarget, inactive, onSelect, children }) => {
+  const classes = [
+    'maze-net-box',
+    net.kind === 'internet' ? 'internet' : '',
+    selected ? 'selected' : '',
+    dropTarget ? 'drop-target' : '',
+    inactive ? 'inactive' : '',
+  ].filter(Boolean).join(' ');
+
+  const Icon = net.kind === 'internet' ? Globe : GitMerge;
+  const resizable = net.kind !== 'internet';
+
+  return (
+    <div
+      className={classes}
+      style={{ left: net.x, top: net.y, width: net.w, height: net.h }}
+      onMouseDown={(e) => {
+        if (e.target === e.currentTarget) { e.stopPropagation(); onSelect?.(net.id); }
+      }}
+    >
+      <div
+        className="maze-net-box-head"
+        onMouseDown={(e) => { e.stopPropagation(); onSelect?.(net.id); }}
+      >
+        <div style={{ display: 'flex', gap: 8, alignItems: 'center' }}>
+          <Icon size={10} />
+          <span>{net.label}</span>
+          {inactive && (
+            <span
+              className="chip-mini"
+              style={{ marginLeft: 4, borderColor: 'var(--border)', color: 'rgba(255,255,255,0.45)' }}
+            >
+              INACTIVE
+            </span>
+          )}
+        </div>
+        <span className="cidr">{net.cidr}</span>
+      </div>
+      {resizable && (
+        <>
+          <div className="net-resize net-resize-e" />
+          <div className="net-resize net-resize-w" />
+          <div className="net-resize net-resize-s" />
+          <div className="net-resize net-resize-n" />
+          <div className="net-resize net-resize-se" />
+          <div className="net-resize net-resize-sw" />
+          <div className="net-resize net-resize-ne" />
+          <div className="net-resize net-resize-nw" />
+        </>
+      )}
+      {children}
+    </div>
+  );
+};
+
+export default NetBox;

decnet_web/src/components/MazeNET/NodeCard.tsx

@@ -0,0 +1,46 @@
+import React from 'react';
+import type { MazeNode } from './types';
+
+interface Props {
+  node: MazeNode;
+  absX: number;
+  absY: number;
+  selected: boolean;
+  onSelect?: (id: string) => void;
+}
+
+const NodeCard: React.FC<Props> = ({ node, absX, absY, selected, onSelect }) => {
+  const classes = [
+    'maze-node',
+    node.kind === 'observed' ? 'observed' : '',
+    node.status === 'hot' ? 'hot' : '',
+    selected ? 'selected' : '',
+  ].filter(Boolean).join(' ');
+
+  return (
+    <div
+      className={classes}
+      style={{ left: absX, top: absY }}
+      onMouseDown={(e) => { e.stopPropagation(); onSelect?.(node.id); }}
+    >
+      <div className="mn-head">{node.name}</div>
+      <div className="mn-sub">{node.archetype.toUpperCase()}</div>
+      {node.services.length > 0 && (
+        <div className="mn-services">
+          {node.services.map((s) => (
+            <span key={s} className={`service-tag ${node.status === 'hot' ? 'hot' : ''}`}>
+              {s}
+            </span>
+          ))}
+        </div>
+      )}
+      {node.kind === 'decky' && <>
+        <span className="mn-port in" />
+        <span className="mn-port out" />
+      </>}
+      {node.kind === 'observed' && <span className="mn-port out" />}
+    </div>
+  );
+};
+
+export default NodeCard;