feat(ui,api,db): implement notifications and custom templates with hand-drawn aesthetic

This commit introduces a significant update to both the frontend and backend, focusing on enhanced user engagement and a consistent visual identity.

Key changes include:

- **Frontend UI/UX Refactor**:
  - Implemented a "hand-drawn" aesthetic across the entire application using CSS overrides, custom SVG charts, and specific border/shadow styles to match the Excalidraw experience.
  - Added a new notification system in the Header to display user updates.
  - Enhanced the Template Picker with more variety and improved interaction models.
  - Added a "Presentation Mode" in the Editor.
  - Improved Dashboard visualizations with hand-drawn style sparklines and charts.
  - Added modal dialogs for creating drawings and templates with custom names.

- **Backend & API Enhancements**:
  - Implemented full CRUD support for custom templates, allowing users to save their drawings as reusable templates.
  - Added a notification service with endpoints to list, mark as read, and mark all as read.
  - Updated the API client to handle more robust JSON responses and error states.
  - Improved CORS/Origin validation in the HTTP middleware to handle proxy headers (`X-Forwarded-Host`, `X-Forwarded-Proto`) more reliably.

- **Database & Infrastructure**:
  - Added a new PostgreSQL migration for the `notifications` table.
  - Updated the data models in the workspace to support templates (including snapshot storage) and notifications.
  - Updated `.gitignore` to exclude graphify cache and AST files.
This commit is contained in:
Tomas Dvorak committed 2026-05-01 15:07:38 +02:00
1 parent f3f9e99a97
commit 462a70933d
28 files changed
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>graphify - graphify-out/graph.html</title>
<script src="https://unpkg.com/vis-network/standalone/umd/vis-network.min.js"></script>
<style>
* { box-sizing: border-box; margin: 0; padding: 0; }
body { background: #0f0f1a; color: #e0e0e0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; display: flex; height: 100vh; overflow: hidden; }
#graph { flex: 1; }
#sidebar { width: 280px; background: #1a1a2e; border-left: 1px solid #2a2a4e; display: flex; flex-direction: column; overflow: hidden; }
#search-wrap { padding: 12px; border-bottom: 1px solid #2a2a4e; }
#search { width: 100%; background: #0f0f1a; border: 1px solid #3a3a5e; color: #e0e0e0; padding: 7px 10px; border-radius: 6px; font-size: 13px; outline: none; }
#search:focus { border-color: #4E79A7; }
#search-results { max-height: 140px; overflow-y: auto; padding: 4px 12px; border-bottom: 1px solid #2a2a4e; display: none; }
.search-item { padding: 4px 6px; cursor: pointer; border-radius: 4px; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-item:hover { background: #2a2a4e; }
#info-panel { padding: 14px; border-bottom: 1px solid #2a2a4e; min-height: 140px; }
#info-panel h3 { font-size: 13px; color: #aaa; margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.05em; }
#info-content { font-size: 13px; color: #ccc; line-height: 1.6; }
#info-content .field { margin-bottom: 5px; }
#info-content .field b { color: #e0e0e0; }
#info-content .empty { color: #555; font-style: italic; }
.neighbor-link { display: block; padding: 2px 6px; margin: 2px 0; border-radius: 3px; cursor: pointer; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border-left: 3px solid #333; }
.neighbor-link:hover { background: #2a2a4e; }
#neighbors-list { max-height: 160px; overflow-y: auto; margin-top: 4px; }
#legend-wrap { flex: 1; overflow-y: auto; padding: 12px; }
#legend-wrap h3 { font-size: 13px; color: #aaa; margin-bottom: 10px; text-transform: uppercase; letter-spacing: 0.05em; }
.legend-item { display: flex; align-items: center; gap: 8px; padding: 4px 0; cursor: pointer; border-radius: 4px; font-size: 12px; }
.legend-item:hover { background: #2a2a4e; padding-left: 4px; }
.legend-item.dimmed { opacity: 0.35; }
.legend-dot { width: 12px; height: 12px; border-radius: 50%; flex-shrink: 0; }
.legend-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.legend-count { color: #666; font-size: 11px; }
#stats { padding: 10px 14px; border-top: 1px solid #2a2a4e; font-size: 11px; color: #555; }
#legend-controls { display: flex; gap: 6px; margin-bottom: 8px; }
#legend-controls button { flex: 1; background: #0f0f1a; border: 1px solid #3a3a5e; color: #aaa; padding: 4px 0; border-radius: 4px; font-size: 11px; cursor: pointer; }
#legend-controls button:hover { border-color: #4E79A7; color: #e0e0e0; }
</style>
</head>
<body>
<div id="graph"></div>
<div id="sidebar">
<div id="search-wrap">
<input id="search" type="text" placeholder="Search nodes..." autocomplete="off">
<div id="search-results"></div>
</div>
<div id="info-panel">
<h3>Node Info</h3>
<div id="info-content"><span class="empty">Click a node to inspect it</span></div>
</div>
<div id="legend-wrap">
<h3>Communities</h3>
<div id="legend-controls">
<button onclick="toggleAllCommunities(false)">Show All</button>
<button onclick="toggleAllCommunities(true)">Hide All</button>
</div>
<div id="legend"></div>
</div>
<div id="stats">872 nodes &middot; 1939 edges &middot; 24 communities</div>
</div>
<script>
const RAW_NODES = [{"id": "main_go", "label": "main.go", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 15.1, "font": {"size": 12, "color": "#ffffff"}, "title": "main.go", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 33}, {"id": "excalidraw_usertofollow", "label": "UserToFollow", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.2, "font": {"size": 0, "color": "#ffffff"}, "title": "UserToFollow", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 1}, {"id": "excalidraw_onuserfollowedpayload", "label": "OnUserFollowedPayload", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.2, "font": {"size": 0, "color": "#ffffff"}, "title": "OnUserFollowedPayload", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 1}, {"id": "excalidraw_main_handleui", "label": "handleUI()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.5, "font": {"size": 0, "color": "#ffffff"}, "title": "handleUI()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 3}, {"id": "excalidraw_main_setuprouter", "label": "setupRouter()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 11.4, "font": {"size": 0, "color": "#ffffff"}, "title": "setupRouter()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 9}, {"id": "excalidraw_main_allowedorigins", "label": "allowedOrigins()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.5, "font": {"size": 0, "color": "#ffffff"}, "title": "allowedOrigins()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 3}, {"id": "excalidraw_main_securityheaders", "label": "securityHeaders()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.2, "font": {"size": 0, "color": "#ffffff"}, "title": "securityHeaders()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 1}, {"id": "excalidraw_main_setupsocketio", "label": "setupSocketIO()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.6, "font": {"size": 0, "color": "#ffffff"}, "title": "setupSocketIO()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 4}, {"id": "excalidraw_main_waitforshutdown", "label": "waitForShutdown()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 10.5, "font": {"size": 0, "color": "#ffffff"}, "title": "waitForShutdown()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 3}, {"id": "excalidraw_main_main", "label": "main()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"background": "#ffffff", "border": "#F28E2B"}}, "size": 11.9, "font": {"size": 0, "color": "#ffffff"}, "title": "main()", "community": 1, "community_name": "Community 1", "source_file": "main.go", "file_type": "code", "degree": 12}, {"id": "handlers_auth_auth_go", "label": "auth.go", "color": {"background": "#B07AA1", "border": "#B07AA1", "highlight": {"background": "#ffffff", "border": "#B07AA1"}}, "size": 15.3, "font": {"size": 12, "color": "#ffffff"}, "title": "auth.go", "community": 6, "community_name": "Community 6", "source_file": "handlers/auth/auth.go", "file_type": "code", "degree": 34}, {"id": "auth_appclaims", "label": "AppClaims", "color": {"background": "#B07AA1", "border": "#B07AA1", "highlight": {"background": "#ffffff", "border": "#B07AA1"}}, "size": 10.2, "font": {"size": 0, "color": "#ffffff"}, "title": "AppClaims", "community": 6, "community_name": "Community 6", "source_file": "handlers/auth/auth.go", "file_type": "code", "degree": 1}, {"id": "auth_oidcclaims", "label": "OIDCClaims", "color": {"background": "#B07AA1", "border": "#B07AA1", "highlight": {"background": "#ffffff", "border": "#B07AA1"}}, "size": 10.2, "font": {"size": 0, "color": "#ffffff"}, "title": "OIDCClaims", "community": 6, "community_name": "Community 6", "source_file": "handlers/auth/auth.go", "file_type": "code", "degree": 1}, {"id": "auth_auth_setworkspacestore", "label": "SetWorkspaceStore()", "color": {"background": "#F28E2B", "border": "#F28E2B", "highlight": {"backgrouLine truncated
const RAW_EDGES = [{"from": "main_go", "to": "go_pkg_embed", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_handlers_api_firebase", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_handlers_api_kv", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_handlers_auth", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_middleware", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_stores", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_excalidraw_complete_workspace", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_flag", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_fmt", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_io", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_io_fs", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_net_http", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_os", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_os_signal", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_strings", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_syscall", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_go_chi_chi_v5", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_go_chi_chi_v5_middleware", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_go_chi_cors", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_joho_godotenv", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_sirupsen_logrus", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_zishang520_engine_io_v2_types", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_zishang520_engine_io_v2_utils", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "go_pkg_github_com_zishang520_socket_io_v2_socket", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "excalidraw_usertofollow", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "excalidraw_onuserfollowedpayload", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "excalidraw_main_handleui", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color": {"opacity": 0.7}, "confidence": "EXTRACTED"}, {"from": "main_go", "to": "excalidraw_main_setuprouter", "label": "", "title": " [EXTRACTED]", "dashes": false, "width": 2, "color"Line truncated
const LEGEND = [];
// HTML-escape helper — prevents XSS when injecting graph data into innerHTML
function esc(s) {
return String(s).replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;').replace(/'/g,'&#39;');
}
// Build vis datasets
const nodesDS = new vis.DataSet(RAW_NODES.map(n => ({
id: n.id, label: n.label, color: n.color, size: n.size,
font: n.font, title: n.title,
_community: n.community, _community_name: n.community_name,
_source_file: n.source_file, _file_type: n.file_type, _degree: n.degree,
})));
const edgesDS = new vis.DataSet(RAW_EDGES.map((e, i) => ({
id: i, from: e.from, to: e.to,
label: '',
title: e.title,
dashes: e.dashes,
width: e.width,
color: e.color,
arrows: { to: { enabled: true, scaleFactor: 0.5 } },
})));
const container = document.getElementById('graph');
const network = new vis.Network(container, { nodes: nodesDS, edges: edgesDS }, {
physics: {
enabled: true,
solver: 'forceAtlas2Based',
forceAtlas2Based: {
gravitationalConstant: -60,
centralGravity: 0.005,
springLength: 120,
springConstant: 0.08,
damping: 0.4,
avoidOverlap: 0.8,
},
stabilization: { iterations: 200, fit: true },
},
interaction: {
hover: true,
tooltipDelay: 100,
hideEdgesOnDrag: true,
navigationButtons: false,
keyboard: false,
},
nodes: { shape: 'dot', borderWidth: 1.5 },
edges: { smooth: { type: 'continuous', roundness: 0.2 }, selectionWidth: 3 },
});
network.once('stabilizationIterationsDone', () => {
network.setOptions({ physics: { enabled: false } });
});
function showInfo(nodeId) {
const n = nodesDS.get(nodeId);
if (!n) return;
const neighborIds = network.getConnectedNodes(nodeId);
const neighborItems = neighborIds.map(nid => {
const nb = nodesDS.get(nid);
const color = nb ? nb.color.background : '#555';
return `<span class="neighbor-link" style="border-left-color:${esc(color)}" onclick="focusNode(${JSON.stringify(nid)})">${esc(nb ? nb.label : nid)}</span>`;
}).join('');
document.getElementById('info-content').innerHTML = `
<div class="field"><b>${esc(n.label)}</b></div>
<div class="field">Type: ${esc(n._file_type || 'unknown')}</div>
<div class="field">Community: ${esc(n._community_name)}</div>
<div class="field">Source: ${esc(n._source_file || '-')}</div>
<div class="field">Degree: ${n._degree}</div>
${neighborIds.length ? `<div class="field" style="margin-top:8px;color:#aaa;font-size:11px">Neighbors (${neighborIds.length})</div><div id="neighbors-list">${neighborItems}</div>` : ''}
`;
}
function focusNode(nodeId) {
network.focus(nodeId, { scale: 1.4, animation: true });
network.selectNodes([nodeId]);
showInfo(nodeId);
}
// Track hovered node — hover detection is more reliable than click params
let hoveredNodeId = null;
network.on('hoverNode', params => {
hoveredNodeId = params.node;
container.style.cursor = 'pointer';
});
network.on('blurNode', () => {
hoveredNodeId = null;
container.style.cursor = 'default';
});
container.addEventListener('click', () => {
if (hoveredNodeId !== null) {
showInfo(hoveredNodeId);
network.selectNodes([hoveredNodeId]);
}
});
network.on('click', params => {
if (params.nodes.length > 0) {
showInfo(params.nodes[0]);
} else if (hoveredNodeId === null) {
document.getElementById('info-content').innerHTML = '<span class="empty">Click a node to inspect it</span>';
}
});
const searchInput = document.getElementById('search');
const searchResults = document.getElementById('search-results');
searchInput.addEventListener('input', () => {
const q = searchInput.value.toLowerCase().trim();
searchResults.innerHTML = '';
if (!q) { searchResults.style.display = 'none'; return; }
const matches = RAW_NODES.filter(n => n.label.toLowerCase().includes(q)).slice(0, 20);
if (!matches.length) { searchResults.style.display = 'none'; return; }
searchResults.style.display = 'block';
matches.forEach(n => {
const el = document.createElement('div');
el.className = 'search-item';
el.textContent = n.label;
el.style.borderLeft = `3px solid ${n.color.background}`;
el.style.paddingLeft = '8px';
el.onclick = () => {
network.focus(n.id, { scale: 1.5, animation: true });
network.selectNodes([n.id]);
showInfo(n.id);
searchResults.style.display = 'none';
searchInput.value = '';
};
searchResults.appendChild(el);
});
});
document.addEventListener('click', e => {
if (!searchResults.contains(e.target) && e.target !== searchInput)
searchResults.style.display = 'none';
});
const hiddenCommunities = new Set();
function toggleAllCommunities(hide) {
document.querySelectorAll('.legend-item').forEach(item => {
hide ? item.classList.add('dimmed') : item.classList.remove('dimmed');
});
LEGEND.forEach(c => {
if (hide) hiddenCommunities.add(c.cid); else hiddenCommunities.delete(c.cid);
});
const updates = RAW_NODES.map(n => ({ id: n.id, hidden: hide }));
nodesDS.update(updates);
}
const legendEl = document.getElementById('legend');
LEGEND.forEach(c => {
const item = document.createElement('div');
item.className = 'legend-item';
item.innerHTML = `<div class="legend-dot" style="background:${c.color}"></div>
<span class="legend-label">${c.label}</span>
<span class="legend-count">${c.count}</span>`;
item.onclick = () => {
if (hiddenCommunities.has(c.cid)) {
hiddenCommunities.delete(c.cid);
item.classList.remove('dimmed');
} else {
hiddenCommunities.add(c.cid);
item.classList.add('dimmed');
}
const updates = RAW_NODES
.filter(n => n.community === c.cid)
.map(n => ({ id: n.id, hidden: hiddenCommunities.has(c.cid) }));
nodesDS.update(updates);
};
legendEl.appendChild(item);
});
</script>
<script>
// Render hyperedges as shaded regions
const hyperedges = [];
// afterDrawing passes ctx already transformed to network coordinate space.
// Draw node positions raw — no manual pan/zoom/DPR math needed.
network.on('afterDrawing', function(ctx) {
hyperedges.forEach(h => {
const positions = h.nodes
.map(nid => network.getPositions([nid])[nid])
.filter(p => p !== undefined);
if (positions.length < 2) return;
ctx.save();
ctx.globalAlpha = 0.12;
ctx.fillStyle = '#6366f1';
ctx.strokeStyle = '#6366f1';
ctx.lineWidth = 2;
ctx.beginPath();
// Centroid and expanded hull in network coordinates
const cx = positions.reduce((s, p) => s + p.x, 0) / positions.length;
const cy = positions.reduce((s, p) => s + p.y, 0) / positions.length;
const expanded = positions.map(p => ({
x: cx + (p.x - cx) * 1.15,
y: cy + (p.y - cy) * 1.15
}));
ctx.moveTo(expanded[0].x, expanded[0].y);
expanded.slice(1).forEach(p => ctx.lineTo(p.x, p.y));
ctx.closePath();
ctx.fill();
ctx.globalAlpha = 0.4;
ctx.stroke();
// Label
ctx.globalAlpha = 0.8;
ctx.fillStyle = '#4f46e5';
ctx.font = 'bold 11px sans-serif';
ctx.textAlign = 'center';
ctx.fillText(h.label, cx, cy - 5);
ctx.restore();
});
});
</script>
</body>
</html>
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