fusible 0.8.3

Electronic linter: a fuse that blows to block firmware code generation
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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Fusible Studio</title>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r128/three.min.js"></script>
  <script src="https://cdn.jsdelivr.net/npm/three@0.128.0/examples/js/controls/OrbitControls.js"></script>
  <style>
    @font-face {
      font-family: 'Undefined';
      src: url('/undefined-medium.otf') format('opentype');
      font-weight: normal;
      font-style: normal;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    :root {
      --bg: #000000;
      --surface: #131313;
      --surface-hover: #1a1a1a;
      --border: #353535;
      --border-subtle: #222222;
      --green: #86A881;
      --green-dark: #229147;
      --olive: #A8B365;
      --text: #FFFFFF;
      --text-body: rgba(255, 255, 255, 0.80);
      --text-subtle: rgba(255, 255, 255, 0.45);
      --alert: #f43f5e;
      --copper: #c87d32;
      --gold: #d4af37;
      --blue: #38bdf8;
    }
    body {
      font-family: 'Undefined', monospace;
      background: var(--bg);
      color: var(--text);
      display: flex;
      flex-direction: column;
      height: 100vh;
      overflow: hidden;
      user-select: none;
    }
    header {
      height: 52px;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      z-index: 20;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-title {
      font-size: 14px;
      letter-spacing: 0.05em;
      color: var(--text);
      font-weight: bold;
    }
    .brand-sub {
      color: var(--olive);
      font-size: 13px;
    }
    .board-name {
      color: var(--text-subtle);
      font-size: 11px;
      padding: 3px 8px;
      background: var(--surface-hover);
      border: 1px solid var(--border);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .fuse-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 3px 10px;
      font-size: 11px;
      letter-spacing: 0.05em;
      border: 1px solid;
    }
    .fuse-intact {
      background: rgba(34, 145, 71, 0.15);
      color: var(--green);
      border-color: var(--green-dark);
    }
    .fuse-blown {
      background: rgba(244, 63, 94, 0.15);
      color: var(--alert);
      border-color: var(--alert);
      animation: fusePulse 1.5s infinite;
    }
    @keyframes fusePulse {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.6; }
    }
    .tabs {
      display: flex;
      background: var(--bg);
      border: 1px solid var(--border);
    }
    .tab-btn {
      background: transparent;
      border: none;
      color: var(--text-subtle);
      padding: 6px 14px;
      font-family: 'Undefined', monospace;
      font-size: 11px;
      letter-spacing: 0.05em;
      cursor: pointer;
      border-right: 1px solid var(--border);
      transition: color 0.15s ease, background 0.15s ease;
    }
    .tab-btn:last-child {
      border-right: none;
    }
    .tab-btn:hover {
      color: var(--text);
      background: var(--surface-hover);
    }
    .tab-btn.active {
      background: var(--surface-hover);
      color: var(--green);
      border-bottom: 2px solid var(--green);
    }
    .controls {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .btn {
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--text-body);
      font-family: 'Undefined', monospace;
      padding: 5px 10px;
      font-size: 11px;
      letter-spacing: 0.05em;
      cursor: pointer;
    }
    .btn:hover {
      background: var(--surface-hover);
      color: var(--text);
      border-color: var(--olive);
    }
    main {
      flex: 1;
      display: flex;
      position: relative;
      overflow: hidden;
    }
    #viewport-container {
      flex: 1;
      position: relative;
      background: var(--bg);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: grab;
    }
    #viewport-container:active {
      cursor: grabbing;
    }
    #viewport-grid {
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(to right, rgba(53, 53, 53, 0.25) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(53, 53, 53, 0.25) 1px, transparent 1px);
      background-size: 32px 32px;
      pointer-events: none;
    }
    #canvas-content {
      transform-origin: 0 0;
      display: inline-block;
      transition: transform 0.05s linear;
      will-change: transform;
      z-index: 2;
    }
    #canvas-content svg {
      display: block;
      filter: drop-shadow(0 10px 25px rgba(0,0,0,0.8));
    }
    #three-container {
      position: absolute;
      inset: 0;
      z-index: 3;
      display: none;
      cursor: default;
    }
    #sidebar {
      width: 340px;
      background: var(--surface);
      border-left: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 10;
    }
    .sidebar-tabs {
      display: flex;
      border-bottom: 1px solid var(--border);
      background: var(--bg);
    }
    .sidebar-tab-btn {
      flex: 1;
      padding: 8px 4px;
      background: transparent;
      border: none;
      color: var(--text-subtle);
      font-family: 'Undefined', monospace;
      font-size: 10px;
      letter-spacing: 0.05em;
      cursor: pointer;
      border-right: 1px solid var(--border);
      transition: color 0.15s, background 0.15s;
    }
    .sidebar-tab-btn:last-child {
      border-right: none;
    }
    .sidebar-tab-btn:hover {
      color: var(--text);
      background: var(--surface-hover);
    }
    .sidebar-tab-btn.active {
      color: var(--green);
      background: var(--surface);
      border-bottom: 2px solid var(--green);
    }
    .sidebar-pane {
      display: none;
      flex: 1;
      overflow-y: auto;
      flex-direction: column;
    }
    .sidebar-pane.active {
      display: flex;
    }
    .sidebar-section {
      padding: 12px 16px;
      border-bottom: 1px solid var(--border);
    }
    .section-title {
      font-size: 11px;
      letter-spacing: 0.1em;
      color: var(--olive);
      margin-bottom: 8px;
    }
    .layer-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 5px 0;
      font-size: 11px;
      letter-spacing: 0.05em;
      color: var(--text-body);
    }
    .layer-label {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .layer-color-dot {
      width: 8px;
      height: 8px;
      border: 1px solid rgba(255,255,255,0.2);
    }
    .toggle-checkbox {
      accent-color: var(--green);
      cursor: pointer;
    }
    .inspector-card {
      padding: 14px 16px;
    }
    .inspector-header {
      display: flex;
      justify-content: space-between;
      align-items: baseline;
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 1px solid var(--border);
    }
    .inspector-name {
      font-size: 14px;
      font-weight: bold;
      color: var(--green);
      letter-spacing: 0.05em;
    }
    .inspector-type {
      font-size: 10px;
      color: var(--olive);
      text-transform: uppercase;
    }
    .prop-row {
      display: flex;
      justify-content: space-between;
      padding: 4px 0;
      font-size: 11px;
      border-bottom: 1px solid rgba(53, 53, 53, 0.3);
    }
    .prop-key {
      color: var(--text-subtle);
    }
    .prop-val {
      color: var(--text-body);
      font-family: monospace;
    }
    .pins-list {
      margin-top: 12px;
    }
    .pins-title {
      font-size: 10px;
      color: var(--olive);
      letter-spacing: 0.05em;
      margin-bottom: 6px;
    }
    .pin-item {
      display: flex;
      justify-content: space-between;
      padding: 3px 6px;
      font-size: 10px;
      background: var(--surface-hover);
      border: 1px solid var(--border-subtle);
      margin-bottom: 3px;
      cursor: pointer;
    }
    .pin-item:hover {
      border-color: var(--blue);
      color: var(--blue);
    }
    .pin-net {
      color: var(--blue);
    }
    .comp-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 16px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 11px;
      cursor: pointer;
      transition: background 0.1s;
    }
    .comp-item:hover {
      background: var(--surface-hover);
      color: var(--green);
    }
    .comp-item.selected {
      background: rgba(134, 168, 129, 0.12);
      border-left: 3px solid var(--green);
    }
    .comp-sub {
      color: var(--text-subtle);
      font-size: 10px;
    }
    .net-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 8px 16px;
      border-bottom: 1px solid var(--border-subtle);
      font-size: 11px;
      cursor: pointer;
      color: var(--text-body);
    }
    .net-item:hover {
      background: var(--surface-hover);
      color: var(--blue);
    }
    .net-item.selected {
      background: rgba(56, 189, 248, 0.12);
      border-left: 3px solid var(--blue);
    }
    .diag-card {
      background: rgba(244, 63, 94, 0.06);
      border: 1px solid rgba(244, 63, 94, 0.3);
      padding: 10px;
      margin: 12px 16px;
      font-size: 11px;
    }
    .diag-title {
      color: var(--alert);
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 6px;
      font-weight: bold;
    }
    .diag-body {
      color: var(--text-body);
      line-height: 1.4;
      white-space: pre-wrap;
    }
    .diag-help {
      color: var(--olive);
      margin-top: 4px;
      line-height: 1.3;
    }
    .empty-state {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 24px 8px;
      color: var(--text-subtle);
      font-size: 11px;
      letter-spacing: 0.05em;
      text-align: center;
    }
    .hud-toast {
      position: absolute;
      bottom: 16px;
      left: 16px;
      background: rgba(19, 19, 19, 0.9);
      border: 1px solid var(--border);
      padding: 6px 12px;
      font-size: 11px;
      color: var(--text-subtle);
      display: flex;
      align-items: center;
      gap: 8px;
      pointer-events: none;
      z-index: 10;
    }
    .status-dot {
      width: 6px;
      height: 6px;
      background: var(--green);
    }
    .hover-tooltip {
      position: fixed;
      z-index: 1000;
      pointer-events: none;
      background: rgba(19, 19, 19, 0.95);
      border: 1px solid var(--border);
      padding: 8px 12px;
      font-size: 11px;
      line-height: 1.4;
      color: var(--text);
      max-width: 280px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.7);
      backdrop-filter: blur(4px);
      display: none;
    }
    .tooltip-title {
      font-weight: bold;
      color: var(--green);
      margin-bottom: 2px;
      letter-spacing: 0.05em;
    }
    .tooltip-meta {
      color: var(--olive);
      font-size: 10px;
      margin-bottom: 4px;
    }
    .tooltip-row {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      color: var(--text-subtle);
      font-size: 10px;
      margin-top: 2px;
    }
    .tooltip-val {
      color: var(--text-body);
      font-family: monospace;
    }
  </style>
</head>
<body>
  <header>
    <div class="brand">
      <span class="brand-title">FUSIBLE</span>
      <span class="brand-sub">// STUDIO</span>
      <span class="board-name" id="board-name">BOARD PREVIEW</span>
      <div id="fuse-status" class="fuse-badge fuse-intact">
        <span id="fuse-text">[OK] FUSE INTACT</span>
      </div>
    </div>

    <div class="tabs">
      <button class="tab-btn active" data-view="pcb" onclick="switchView('pcb')">01 // PCB LAYOUT</button>
      <button class="tab-btn" data-view="schematic" onclick="switchView('schematic')">02 // SCHEMATIC</button>
      <button class="tab-btn" data-view="3d" onclick="switchView('3d')">03 // 3D VIEW</button>
    </div>

    <div class="controls" id="controls-2d">
      <button class="btn" onclick="zoomIn()">[ZOOM +]</button>
      <button class="btn" onclick="zoomOut()">[ZOOM -]</button>
      <button class="btn" onclick="resetZoom()">[RESET]</button>
    </div>

    <div class="controls" id="controls-3d" style="display: none;">
      <button class="btn" onclick="setCameraPreset('TOP')">[TOP]</button>
      <button class="btn" onclick="setCameraPreset('ISO')">[ISO]</button>
      <button class="btn" onclick="setCameraPreset('FRONT')">[FRONT]</button>
      <button class="btn" onclick="setCameraPreset('RESET')">[RESET]</button>
    </div>
  </header>

  <main>
    <div id="viewport-container">
      <div id="viewport-grid"></div>
      <div id="canvas-content"></div>
      <div id="three-container"></div>
      <div class="hud-toast">
        <div class="status-dot" id="live-dot"></div>
        <span id="live-status">[LIVE] SSE CONNECTED</span>
      </div>
      <div id="hover-tooltip" class="hover-tooltip"></div>
    </div>

    <aside id="sidebar">
      <div class="sidebar-tabs">
        <button class="sidebar-tab-btn active" onclick="switchSidebarTab('inspector')">INSPECT</button>
        <button class="sidebar-tab-btn" onclick="switchSidebarTab('components')">PARTS</button>
        <button class="sidebar-tab-btn" onclick="switchSidebarTab('nets')">NETS</button>
        <button class="sidebar-tab-btn" onclick="switchSidebarTab('layers')">LAYERS</button>
        <button class="sidebar-tab-btn" onclick="switchSidebarTab('checks')">CHECKS</button>
      </div>

      <div class="sidebar-pane active" id="pane-inspector">
        <div id="inspector-content" class="inspector-card">
          <div class="empty-state">
            <span>SELECT OR HOVER A COMPONENT OR PAD TO INSPECT</span>
          </div>
        </div>
      </div>

      <div class="sidebar-pane" id="pane-components">
        <div id="components-list">
          <div class="empty-state"><span>NO COMPONENTS PARSED</span></div>
        </div>
      </div>

      <div class="sidebar-pane" id="pane-nets">
        <div id="nets-list">
          <div class="empty-state"><span>NO NETS DETECTED</span></div>
        </div>
      </div>

      <div class="sidebar-pane" id="pane-layers">
        <div class="sidebar-section">
          <div class="section-title">PCB COPPER & MASKS</div>
          <div class="layer-item">
            <div class="layer-label">
              <span class="layer-color-dot" style="background: var(--copper);"></span>
              <span>TOP COPPER</span>
            </div>
            <input type="checkbox" class="toggle-checkbox" checked onchange="toggleLayer('top_copper', this.checked)">
          </div>
          <div class="layer-item">
            <div class="layer-label">
              <span class="layer-color-dot" style="background: var(--blue);"></span>
              <span>BOTTOM COPPER</span>
            </div>
            <input type="checkbox" class="toggle-checkbox" checked onchange="toggleLayer('bottom_copper', this.checked)">
          </div>
          <div class="layer-item">
            <div class="layer-label">
              <span class="layer-color-dot" style="background: var(--gold);"></span>
              <span>PADS (ENIG GOLD)</span>
            </div>
            <input type="checkbox" class="toggle-checkbox" checked onchange="toggleLayer('pads', this.checked)">
          </div>
          <div class="layer-item">
            <div class="layer-label">
              <span class="layer-color-dot" style="background: #ffffff;"></span>
              <span>SILKSCREEN</span>
            </div>
            <input type="checkbox" class="toggle-checkbox" checked onchange="toggleLayer('silkscreen', this.checked)">
          </div>
          <div class="layer-item">
            <div class="layer-label">
              <span class="layer-color-dot" style="background: var(--border);"></span>
              <span>HOLES & VIAS</span>
            </div>
            <input type="checkbox" class="toggle-checkbox" checked onchange="toggleLayer('holes_and_vias', this.checked)">
          </div>
        </div>
      </div>

      <div class="sidebar-pane" id="pane-checks">
        <div id="diagnostics-panel">
          <div class="empty-state">
            <span>NO ELECTRICAL VIOLATIONS DETECTED.</span>
          </div>
        </div>
      </div>
    </aside>
  </main>

  <script>
    let currentView = 'pcb';
    let pcbSvg = '';
    let schematicSvg = '';
    let lastCircuitJson = null;

    let zoomLevel = 1.0;
    let panX = 0;
    let panY = 0;
    let isDragging = false;
    let startX = 0;
    let startY = 0;

    const viewport = document.getElementById('viewport-container');
    const canvas = document.getElementById('canvas-content');
    const tooltip = document.getElementById('hover-tooltip');

    let scene = null;
    let camera = null;
    let renderer = null;
    let controls = null;
    let boardGroup = null;
    let threeInitialized = false;

    let boardWidth = 60;
    let boardHeight = 40;
    let boardCenterX = 0;
    let boardCenterZ = 0;

    let componentsMap = {};
    let netsMap = {};
    let selectedComponent = null;

    function applyTransform() {
      canvas.style.transform = `translate(${panX}px, ${panY}px) scale(${zoomLevel})`;
    }

    function zoomIn() {
      zoomLevel *= 1.25;
      applyTransform();
    }

    function zoomOut() {
      zoomLevel /= 1.25;
      applyTransform();
    }

    function resetZoom() {
      zoomLevel = 1.0;
      panX = 0;
      panY = 0;
      applyTransform();
    }

    viewport.addEventListener('wheel', (e) => {
      if (currentView === '3d') return;
      e.preventDefault();
      const zoomFactor = e.deltaY < 0 ? 1.15 : 0.85;
      zoomLevel *= zoomFactor;
      applyTransform();
    }, { passive: false });

    viewport.addEventListener('mousedown', (e) => {
      if (currentView === '3d') return;
      if (e.button === 0) {
        isDragging = true;
        startX = e.clientX - panX;
        startY = e.clientY - panY;
      }
    });

    window.addEventListener('mousemove', (e) => {
      if (currentView === '3d') return;
      if (isDragging) {
        panX = e.clientX - startX;
        panY = e.clientY - startY;
        applyTransform();
      }
    });

    window.addEventListener('mouseup', () => {
      isDragging = false;
    });

    function switchView(view) {
      currentView = view;
      document.querySelectorAll('.tab-btn').forEach(btn => {
        btn.classList.toggle('active', btn.getAttribute('data-view') === view);
      });

      const is3d = view === '3d';
      document.getElementById('canvas-content').style.display = is3d ? 'none' : 'inline-block';
      document.getElementById('three-container').style.display = is3d ? 'block' : 'none';
      document.getElementById('controls-2d').style.display = is3d ? 'none' : 'flex';
      document.getElementById('controls-3d').style.display = is3d ? 'flex' : 'none';

      hideTooltip();

      if (is3d) {
        initThree();
        build3DScene();
        setTimeout(onThreeResize, 10);
        setCameraPreset('ISO');
      } else {
        renderCurrentView();
      }
    }

    function switchSidebarTab(tabId) {
      document.querySelectorAll('.sidebar-tab-btn').forEach(btn => {
        btn.classList.toggle('active', btn.getAttribute('onclick').includes(tabId));
      });
      document.querySelectorAll('.sidebar-pane').forEach(p => p.classList.remove('active'));
      const activePane = document.getElementById(`pane-${tabId}`);
      if (activePane) activePane.classList.add('active');
    }

    function renderCurrentView() {
      if (currentView === 'pcb') {
        canvas.innerHTML = pcbSvg || '<div class="empty-state">NO PCB LAYOUT AVAILABLE</div>';
        setup2DInteractivity();
      } else if (currentView === 'schematic') {
        canvas.innerHTML = schematicSvg || '<div class="empty-state">NO SCHEMATIC AVAILABLE</div>';
        setup2DInteractivity();
      }
    }

    function toggleLayer(layerName, visible) {
      const groups = canvas.querySelectorAll(`g[id="${layerName}"]`);
      groups.forEach(g => {
        g.style.display = visible ? '' : 'none';
      });
    }

    function showTooltip(x, y, data) {
      if (!data) return;
      let html = `<div class="tooltip-title">${escapeHtml(data.name || data.ref || 'ELEMENT')}</div>`;
      if (data.type) html += `<div class="tooltip-meta">${escapeHtml(data.type.toUpperCase())}</div>`;
      if (data.part) html += `<div class="tooltip-row"><span>MPN:</span><span class="tooltip-val">${escapeHtml(data.part)}</span></div>`;
      if (data.net) html += `<div class="tooltip-row"><span>NET:</span><span class="tooltip-val" style="color:var(--blue)">${escapeHtml(data.net)}</span></div>`;
      if (data.pos) html += `<div class="tooltip-row"><span>POS:</span><span class="tooltip-val">${data.pos}</span></div>`;
      if (data.layer) html += `<div class="tooltip-row"><span>LAYER:</span><span class="tooltip-val">${escapeHtml(data.layer)}</span></div>`;
      if (data.extra) html += `<div class="tooltip-row"><span>PINS:</span><span class="tooltip-val">${data.extra}</span></div>`;

      tooltip.innerHTML = html;
      tooltip.style.left = `${x + 14}px`;
      tooltip.style.top = `${y + 14}px`;
      tooltip.style.display = 'block';
    }

    function hideTooltip() {
      tooltip.style.display = 'none';
    }

    function setup2DInteractivity() {
      const svg = canvas.querySelector('svg');
      if (!svg) return;

      svg.addEventListener('mousemove', (e) => {
        if (isDragging) {
          hideTooltip();
          return;
        }

        const rect = svg.getBoundingClientRect();
        const pt = svg.createSVGPoint();
        pt.x = e.clientX;
        pt.y = e.clientY;
        const svgP = pt.matrixTransform(svg.getScreenCTM().inverse());
        const circX = svgP.x;
        const circY = -svgP.y;

        const comp = findClosestComponent(circX, circY);
        if (comp) {
          showTooltip(e.clientX, e.clientY, {
            name: comp.name,
            type: comp.ftype || 'component',
            part: comp.mpn,
            pos: `(${comp.x.toFixed(2)}, ${comp.y.toFixed(2)}) mm`,
            layer: comp.layer || 'top',
            extra: `${comp.pins.length} pins`
          });
          return;
        }

        const pad = findClosestPad(circX, circY);
        if (pad) {
          showTooltip(e.clientX, e.clientY, {
            name: `PAD ${pad.id}`,
            type: 'smtpad',
            net: pad.net,
            pos: `(${pad.x.toFixed(2)}, ${pad.y.toFixed(2)}) mm`,
            layer: pad.layer
          });
          return;
        }

        hideTooltip();
      });

      svg.addEventListener('mouseleave', hideTooltip);

      svg.addEventListener('click', (e) => {
        const pt = svg.createSVGPoint();
        pt.x = e.clientX;
        pt.y = e.clientY;
        const svgP = pt.matrixTransform(svg.getScreenCTM().inverse());
        const comp = findClosestComponent(svgP.x, -svgP.y);
        if (comp) {
          selectComponent(comp.name);
        }
      });
    }

    function findClosestComponent(x, y) {
      for (const name in componentsMap) {
        const c = componentsMap[name];
        const halfW = (c.w || 4) / 2;
        const halfH = (c.h || 4) / 2;
        if (x >= c.x - halfW && x <= c.x + halfW && y >= c.y - halfH && y <= c.y + halfH) {
          return c;
        }
      }
      return null;
    }

    function findClosestPad(x, y) {
      const elements = getElementsArray();
      for (const e of elements) {
        if (e.type === 'pcb_smtpad') {
          const px = e.x ?? e.center?.x ?? 0;
          const py = e.y ?? e.center?.y ?? 0;
          const pw = e.width || 1.0;
          const ph = e.height || 1.0;
          if (Math.abs(x - px) <= pw / 2 && Math.abs(y - py) <= ph / 2) {
            return {
              id: e.pcb_smtpad_id || e.port_hints?.[0] || '1',
              x: px,
              y: py,
              layer: e.layer || 'top',
              net: e.net || e.subcircuit_id || 'SIGNAL'
            };
          }
        }
      }
      return null;
    }

    function getElementsArray() {
      if (!lastCircuitJson) return [];
      if (Array.isArray(lastCircuitJson)) return lastCircuitJson;
      return Array.isArray(lastCircuitJson.elements) ? lastCircuitJson.elements : [];
    }

    function parseCircuitGraph() {
      componentsMap = {};
      netsMap = {};

      const elements = getElementsArray();

      const sourceCompMap = {};
      elements.filter(e => e.type === 'source_component').forEach(sc => {
        sourceCompMap[sc.source_component_id || sc.component_id] = {
          name: sc.name || sc.component_id || 'U',
          mpn: sc.manufacturer_part_number || '',
          ftype: sc.ftype || sc.kind || ''
        };
      });

      const portNetMap = {};
      elements.filter(e => e.type === 'source_port').forEach(sp => {
        portNetMap[sp.source_port_id || sp.port_id] = {
          name: sp.name || '',
          pin: sp.pin_number || ''
        };
      });

      elements.filter(e => e.type === 'source_net').forEach(sn => {
        const netName = sn.name || sn.net_id || 'NET';
        netsMap[netName] = {
          name: netName,
          count: 0
        };
      });

      elements.filter(e => e.type === 'pcb_trace').forEach(t => {
        const netName = t.connection_name;
        if (netName) {
          if (!netsMap[netName]) netsMap[netName] = { name: netName, count: 0 };
          netsMap[netName].count++;
        }
      });

      elements.filter(e => e.type === 'pcb_component').forEach(pc => {
        const src = sourceCompMap[pc.source_component_id] || {};
        const name = src.name || pc.pcb_component_id || 'COMP';
        const cx = pc.center?.x ?? pc.x ?? 0;
        const cy = pc.center?.y ?? pc.y ?? 0;
        const cw = pc.width || 4;
        const ch = pc.height || 4;

        componentsMap[name] = {
          name,
          mpn: src.mpn,
          ftype: src.ftype,
          x: cx,
          y: cy,
          w: cw,
          h: ch,
          layer: pc.layer || 'top',
          id: pc.pcb_component_id,
          pins: []
        };
      });

      if (Object.keys(componentsMap).length === 0) {
        Object.entries(sourceCompMap).forEach(([id, src]) => {
          const name = src.name || id;
          componentsMap[name] = {
            name,
            mpn: src.mpn,
            ftype: src.ftype,
            x: 0,
            y: 0,
            w: 4,
            h: 4,
            layer: 'top',
            id,
            pins: []
          };
        });
      }

      elements.filter(e => e.type === 'schematic_component').forEach(sc => {
        const src = sourceCompMap[sc.source_component_id] || {};
        const name = src.name;
        if (name && componentsMap[name] && sc.port_labels) {
          for (const pin in sc.port_labels) {
            componentsMap[name].pins.push({
              pin,
              net: sc.port_labels[pin]
            });
          }
        }
      });

      renderComponentsList();
      renderNetsList();
    }

    function renderComponentsList() {
      const container = document.getElementById('components-list');
      const names = Object.keys(componentsMap).sort();
      if (names.length === 0) {
        container.innerHTML = '<div class="empty-state"><span>NO COMPONENTS PARSED</span></div>';
        return;
      }
      container.innerHTML = names.map(name => {
        const c = componentsMap[name];
        return `
          <div class="comp-item ${selectedComponent === name ? 'selected' : ''}" onclick="selectComponent('${escapeHtml(name)}')">
            <div>
              <div style="font-weight:bold">${escapeHtml(name)}</div>
              <div class="comp-sub">${escapeHtml(c.mpn || c.ftype || '')}</div>
            </div>
            <div class="comp-sub">(${c.x.toFixed(1)}, ${c.y.toFixed(1)})</div>
          </div>
        `;
      }).join('');
    }

    function renderNetsList() {
      const container = document.getElementById('nets-list');
      const names = Object.keys(netsMap).sort();
      if (names.length === 0) {
        container.innerHTML = '<div class="empty-state"><span>NO NETS DETECTED</span></div>';
        return;
      }
      container.innerHTML = names.map(name => `
        <div class="net-item" onclick="selectNet('${escapeHtml(name)}')">
          <span style="font-weight:bold">${escapeHtml(name)}</span>
          <span style="color:var(--text-subtle);font-size:10px">${netsMap[name].count} segments</span>
        </div>
      `).join('');
    }

    function selectComponent(name) {
      selectedComponent = name;
      renderComponentsList();
      const comp = componentsMap[name];
      if (!comp) return;

      switchSidebarTab('inspector');
      const panel = document.getElementById('inspector-content');

      let pinsHtml = '';
      if (comp.pins && comp.pins.length > 0) {
        pinsHtml = `
          <div class="pins-list">
            <div class="pins-title">CONNECTED PINS & SIGNALS</div>
            ${comp.pins.map(p => `
              <div class="pin-item" onclick="selectNet('${escapeHtml(p.net)}')">
                <span>${escapeHtml(p.pin)}</span>
                <span class="pin-net">${escapeHtml(p.net)}</span>
              </div>
            `).join('')}
          </div>
        `;
      }

      panel.innerHTML = `
        <div class="inspector-header">
          <span class="inspector-name">${escapeHtml(comp.name)}</span>
          <span class="inspector-type">${escapeHtml(comp.ftype || 'COMPONENT')}</span>
        </div>
        ${comp.mpn ? `<div class="prop-row"><span class="prop-key">MPN</span><span class="prop-val">${escapeHtml(comp.mpn)}</span></div>` : ''}
        <div class="prop-row"><span class="prop-key">CENTER</span><span class="prop-val">(${comp.x.toFixed(2)}, ${comp.y.toFixed(2)}) mm</span></div>
        <div class="prop-row"><span class="prop-key">FOOTPRINT</span><span class="prop-val">${comp.w.toFixed(1)} x ${comp.h.toFixed(1)} mm</span></div>
        <div class="prop-row"><span class="prop-key">LAYER</span><span class="prop-val">${escapeHtml(comp.layer.toUpperCase())}</span></div>
        ${pinsHtml}
      `;

      if (currentView === '3d' && boardGroup) {
        boardGroup.children.forEach(obj => {
          if (obj.userData && obj.userData.name === name && obj.material) {
            obj.material.emissive = new THREE.Color(0x86A881);
            obj.material.emissiveIntensity = 0.8;
          }
        });
      }
    }

    function selectNet(netName) {
      document.querySelectorAll('.net-item').forEach(el => {
        el.classList.toggle('selected', el.textContent.includes(netName));
      });
      showTooltip(window.innerWidth / 2, 80, {
        name: `NET: ${netName}`,
        type: 'SIGNAL TRACE HIGHLIGHT',
        net: netName
      });
      setTimeout(hideTooltip, 2000);
    }

    function updateDiagnostics(fuseBlown, diagnostics) {
      const statusEl = document.getElementById('fuse-status');
      const textEl = document.getElementById('fuse-text');
      const diagPanel = document.getElementById('diagnostics-panel');

      if (fuseBlown) {
        statusEl.className = 'fuse-badge fuse-blown';
        textEl.textContent = `[BLOWN] FUSE BLOWN (${diagnostics.length})`;

        if (diagnostics.length > 0) {
          diagPanel.innerHTML = diagnostics.map(d => `
            <div class="diag-card">
              <div class="diag-title">[!] ${escapeHtml((d.rule || 'VIOLATION').toUpperCase())}</div>
              <div class="diag-body">${escapeHtml(d.message || '')}</div>
              ${d.help ? `<div class="diag-help">> ${escapeHtml(d.help)}</div>` : ''}
            </div>
          `).join('');
        }
      } else {
        statusEl.className = 'fuse-badge fuse-intact';
        textEl.textContent = '[OK] FUSE INTACT';
        diagPanel.innerHTML = '<div class="empty-state"><span>NO ELECTRICAL VIOLATIONS DETECTED.</span></div>';
      }
    }

    function escapeHtml(str) {
      return str.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
    }

    function onThreeResize() {
      if (!renderer || !camera) return;
      const container = document.getElementById('three-container');
      const w = container.clientWidth;
      const h = container.clientHeight;
      if (w === 0 || h === 0) return;
      camera.aspect = w / h;
      camera.updateProjectionMatrix();
      renderer.setSize(w, h);
    }

    let raycaster = null;
    let mouseVector = null;
    let hoveredObject = null;
    let originalColor = null;

    function initThree() {
      if (threeInitialized) return;
      const container = document.getElementById('three-container');
      const width = container.clientWidth || window.innerWidth;
      const height = container.clientHeight || window.innerHeight;

      scene = new THREE.Scene();
      scene.background = new THREE.Color(0x000000);

      camera = new THREE.PerspectiveCamera(45, width / height, 0.1, 2000);
      camera.position.set(0, 100, 100);

      renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true });
      renderer.setSize(width, height);
      renderer.setPixelRatio(window.devicePixelRatio || 1);
      container.appendChild(renderer.domElement);

      controls = new THREE.OrbitControls(camera, renderer.domElement);
      controls.enableDamping = true;
      controls.dampingFactor = 0.05;

      const ambientLight = new THREE.AmbientLight(0xffffff, 0.75);
      scene.add(ambientLight);

      const dirLight1 = new THREE.DirectionalLight(0xffffff, 0.9);
      dirLight1.position.set(60, 120, 80);
      scene.add(dirLight1);

      const dirLight2 = new THREE.DirectionalLight(0x8899aa, 0.5);
      dirLight2.position.set(-60, -80, -60);
      scene.add(dirLight2);

      const grid = new THREE.GridHelper(200, 40, 0x353535, 0x131313);
      grid.position.y = -1.0;
      scene.add(grid);

      boardGroup = new THREE.Group();
      scene.add(boardGroup);

      raycaster = new THREE.Raycaster();
      mouseVector = new THREE.Vector2();

      container.addEventListener('mousemove', onThreeMouseMove);
      container.addEventListener('click', onThreeClick);

      function animate() {
        requestAnimationFrame(animate);
        controls.update();
        renderer.render(scene, camera);
      }
      animate();

      window.addEventListener('resize', onThreeResize);
      threeInitialized = true;
    }

    function onThreeMouseMove(e) {
      if (currentView !== '3d' || !renderer || !camera || !boardGroup) return;
      const container = document.getElementById('three-container');
      const rect = container.getBoundingClientRect();
      mouseVector.x = ((e.clientX - rect.left) / rect.width) * 2 - 1;
      mouseVector.y = -((e.clientY - rect.top) / rect.height) * 2 + 1;

      raycaster.setFromCamera(mouseVector, camera);
      const intersects = raycaster.intersectObjects(boardGroup.children, true);
      const hit = intersects.find(i => i.object.userData && i.object.userData.type);

      if (hit) {
        if (hoveredObject !== hit.object) {
          clearThreeHighlight();
          hoveredObject = hit.object;
          if (hoveredObject.material && hoveredObject.material.emissive) {
            originalColor = hoveredObject.material.emissive.getHex();
            hoveredObject.material.emissive.setHex(0x38bdf8);
            hoveredObject.material.emissiveIntensity = 0.8;
          }
        }
        showTooltip(e.clientX, e.clientY, hoveredObject.userData);
        container.style.cursor = 'pointer';
      } else {
        clearThreeHighlight();
        hideTooltip();
        container.style.cursor = 'default';
      }
    }

    function onThreeClick() {
      if (hoveredObject && hoveredObject.userData && hoveredObject.userData.name) {
        selectComponent(hoveredObject.userData.name);
      }
    }

    function clearThreeHighlight() {
      if (hoveredObject && hoveredObject.material && hoveredObject.material.emissive) {
        hoveredObject.material.emissive.setHex(originalColor || 0x000000);
        hoveredObject.material.emissiveIntensity = 0.0;
      }
      hoveredObject = null;
    }

    function setCameraPreset(preset) {
      if (!controls || !camera) return;
      const dist = Math.max(boardWidth, boardHeight) * 1.8;
      const tx = boardCenterX;
      const tz = boardCenterZ;
      controls.target.set(tx, 0, tz);

      if (preset === 'TOP') {
        camera.position.set(tx, dist, tz + 0.001);
        camera.up.set(0, 0, -1);
      } else if (preset === 'FRONT') {
        camera.position.set(tx, dist * 0.1, tz + dist);
        camera.up.set(0, 1, 0);
      } else if (preset === 'ISO' || preset === 'RESET') {
        camera.position.set(tx + dist * 0.7, dist * 0.8, tz + dist * 0.7);
        camera.up.set(0, 1, 0);
      }
      controls.update();
    }

    function makeTextSprite(message) {
      const c = document.createElement('canvas');
      c.width = 256;
      c.height = 64;
      const ctx = c.getContext('2d');
      ctx.fillStyle = '#ffffff';
      ctx.font = 'bold 32px monospace';
      ctx.textAlign = 'center';
      ctx.textBaseline = 'middle';
      ctx.fillText(message, 128, 32);

      const tex = new THREE.CanvasTexture(c);
      tex.minFilter = THREE.LinearFilter;
      const mat = new THREE.SpriteMaterial({ map: tex, transparent: true });
      const sprite = new THREE.Sprite(mat);
      const aspect = c.width / c.height;
      sprite.scale.set(1.5 * aspect, 1.5, 1);
      return sprite;
    }

    function build3DScene() {
      if (!boardGroup) return;

      while (boardGroup.children.length > 0) {
        const obj = boardGroup.children[0];
        boardGroup.remove(obj);
        if (obj.geometry) obj.geometry.dispose();
      }

      const elements = getElementsArray();

      const boards = elements.filter(e => e.type === 'pcb_board');
      boardWidth = 60;
      boardHeight = 40;
      boardCenterX = 0;
      boardCenterZ = 0;

      if (boards.length > 0) {
        const b = boards[0];
        boardWidth = b.width || 60;
        boardHeight = b.height || 40;
        boardCenterX = b.center?.x || 0;
        boardCenterZ = b.center?.y || 0;
      } else {
        let minX = Infinity, maxX = -Infinity, minZ = Infinity, maxZ = -Infinity;
        elements.forEach(e => {
          const x = e.x ?? e.center?.x;
          const z = e.y ?? e.center?.y;
          if (x !== undefined && z !== undefined) {
            if (x < minX) minX = x;
            if (x > maxX) maxX = x;
            if (z < minZ) minZ = z;
            if (z > maxZ) maxZ = z;
          }
        });
        if (minX !== Infinity) {
          boardWidth = Math.max(20, (maxX - minX) + 20);
          boardHeight = Math.max(20, (maxZ - minZ) + 20);
          boardCenterX = (minX + maxX) / 2;
          boardCenterZ = (minZ + maxZ) / 2;
        }
      }

      const substrateThickness = 1.6;
      const boardMat = new THREE.MeshStandardMaterial({
        color: 0x112417,
        roughness: 0.5,
        metalness: 0.1
      });
      const boardGeo = new THREE.BoxGeometry(boardWidth, substrateThickness, boardHeight);
      const boardMesh = new THREE.Mesh(boardGeo, boardMat);
      boardMesh.position.set(boardCenterX, 0, boardCenterZ);
      boardGroup.add(boardMesh);

      const padMat = new THREE.MeshStandardMaterial({
        color: 0xd4af37,
        metalness: 0.85,
        roughness: 0.25
      });

      elements.filter(e => e.type === 'pcb_smtpad').forEach(pad => {
        const px = pad.x ?? pad.center?.x ?? 0;
        const pz = pad.y ?? pad.center?.y ?? 0;
        const isBottom = pad.layer === 'bottom';
        const py = isBottom ? -(substrateThickness / 2 + 0.02) : (substrateThickness / 2 + 0.02);
        const shape = pad.shape || (pad.radius ? 'circle' : 'rect');
        let padMesh;
        if (shape === 'circle') {
          const r = pad.radius || ((pad.width || 1.0) / 2);
          const geo = new THREE.CylinderGeometry(r, r, 0.04, 24);
          padMesh = new THREE.Mesh(geo, padMat.clone());
        } else {
          const pw = pad.width || 1.2;
          const ph = pad.height || 1.2;
          const geo = new THREE.BoxGeometry(pw, 0.04, ph);
          padMesh = new THREE.Mesh(geo, padMat.clone());
        }
        padMesh.position.set(px, py, pz);
        padMesh.userData = {
          type: 'smtpad',
          name: pad.port_hints?.[0] ? `PAD ${pad.port_hints[0]}` : 'PAD',
          pos: `(${px.toFixed(2)}, ${pz.toFixed(2)}) mm`,
          layer: pad.layer || 'top'
        };
        boardGroup.add(padMesh);
      });

      const viaMat = new THREE.MeshStandardMaterial({
        color: 0xc87d32,
        metalness: 0.8,
        roughness: 0.3
      });
      const holeMat = new THREE.MeshBasicMaterial({ color: 0x050505 });

      elements.filter(e => e.type === 'pcb_via' || e.type === 'pcb_plated_hole').forEach(via => {
        const vx = via.x ?? via.center?.x ?? 0;
        const vz = via.y ?? via.center?.y ?? 0;
        const outerR = ((via.outer_diameter || 0.6) / 2);
        const holeR = ((via.hole_diameter || 0.3) / 2);

        const viaGeo = new THREE.CylinderGeometry(outerR, outerR, substrateThickness + 0.06, 24);
        const viaMesh = new THREE.Mesh(viaGeo, viaMat.clone());
        viaMesh.position.set(vx, 0, vz);
        viaMesh.userData = {
          type: 'via',
          name: via.type === 'pcb_via' ? 'VIA' : 'PLATED HOLE',
          pos: `(${vx.toFixed(2)}, ${vz.toFixed(2)}) mm`
        };
        boardGroup.add(viaMesh);

        const holeGeo = new THREE.CylinderGeometry(holeR, holeR, substrateThickness + 0.08, 16);
        const holeMesh = new THREE.Mesh(holeGeo, holeMat);
        holeMesh.position.set(vx, 0, vz);
        boardGroup.add(holeMesh);
      });

      elements.filter(e => e.type === 'pcb_trace').forEach(trace => {
        const route = trace.route || [];
        if (route.length < 2) return;
        const isBottom = route[0].layer === 'bottom' || trace.layer === 'bottom';
        const color = isBottom ? 0x38bdf8 : 0xc87d32;
        const py = isBottom ? -(substrateThickness / 2 + 0.03) : (substrateThickness / 2 + 0.03);
        const traceMat = new THREE.MeshStandardMaterial({
          color: color,
          metalness: 0.8,
          roughness: 0.35,
          side: THREE.DoubleSide
        });

        for (let i = 0; i < route.length - 1; i++) {
          const p1 = route[i];
          const p2 = route[i + 1];
          const w = p1.width || trace.width || 0.3;
          const dx = p2.x - p1.x;
          const dz = p2.y - p1.y;
          const len = Math.sqrt(dx * dx + dz * dz);
          if (len < 0.001) continue;

          const angle = Math.atan2(dz, dx);
          const geo = new THREE.PlaneGeometry(len, w);
          geo.rotateX(-Math.PI / 2);
          geo.rotateY(-angle);

          const mesh = new THREE.Mesh(geo, traceMat);
          mesh.position.set((p1.x + p2.x) / 2, py, (p1.y + p2.y) / 2);
          mesh.userData = {
            type: 'trace',
            net: trace.connection_name || 'SIGNAL'
          };
          boardGroup.add(mesh);
        }
      });

      const chipMat = new THREE.MeshStandardMaterial({
        color: 0x1a1a1a,
        roughness: 0.6,
        metalness: 0.2
      });
      const pinMat = new THREE.MeshStandardMaterial({
        color: 0xe2e8f0,
        roughness: 0.2,
        metalness: 0.9
      });

      elements.filter(e => e.type === 'pcb_component').forEach(comp => {
        const cx = comp.center?.x ?? comp.x ?? 0;
        const cz = comp.center?.y ?? comp.y ?? 0;
        const cw = comp.width || 6;
        const ch = comp.height || 6;
        const cThick = 1.6;
        const isBottom = comp.layer === 'bottom';
        const cy = isBottom ? -(substrateThickness / 2 + cThick / 2 + 0.05) : (substrateThickness / 2 + cThick / 2 + 0.05);

        const compName = Object.keys(componentsMap).find(k => componentsMap[k].id === comp.pcb_component_id) || comp.pcb_component_id || 'U';
        const compData = componentsMap[compName] || {};

        const chipGeo = new THREE.BoxGeometry(cw, cThick, ch);
        const chipMesh = new THREE.Mesh(chipGeo, chipMat.clone());
        chipMesh.position.set(cx, cy, cz);
        chipMesh.userData = {
          type: 'component',
          name: compName,
          part: compData.mpn || compData.ftype || 'IC',
          pos: `(${cx.toFixed(2)}, ${cz.toFixed(2)}) mm`,
          layer: comp.layer || 'top',
          extra: `${compData.pins?.length || 0} pins`
        };
        boardGroup.add(chipMesh);

        const sprite = makeTextSprite(compName);
        sprite.position.set(cx, cy + (isBottom ? -cThick / 2 - 0.4 : cThick / 2 + 0.4), cz);
        boardGroup.add(sprite);

        const pinW = 0.6;
        const pinLen = 1.0;
        const pinH = 0.2;
        const pinY = isBottom ? -(substrateThickness / 2 + 0.05) : (substrateThickness / 2 + 0.05);

        const numPins = 4;
        for (let p = 0; p < numPins; p++) {
          const offset = (p - (numPins - 1) / 2) * (ch / numPins);
          const leftPin = new THREE.Mesh(new THREE.BoxGeometry(pinLen, pinH, pinW), pinMat);
          leftPin.position.set(cx - cw / 2, pinY, cz + offset);
          boardGroup.add(leftPin);

          const rightPin = new THREE.Mesh(new THREE.BoxGeometry(pinLen, pinH, pinW), pinMat);
          rightPin.position.set(cx + cw / 2, pinY, cz + offset);
          boardGroup.add(rightPin);
        }
      });
    }

    function updateStudio(data) {
      if (!data) return;
      if (data.board_name) {
        document.getElementById('board-name').textContent = data.board_name.toUpperCase();
      }
      if (data.pcb_svg) pcbSvg = data.pcb_svg;
      if (data.schematic_svg) schematicSvg = data.schematic_svg;
      if (data.circuit_json) {
        lastCircuitJson = data.circuit_json;
        parseCircuitGraph();
        if (currentView === '3d') {
          build3DScene();
        }
      }
      updateDiagnostics(data.fuse_blown, data.diagnostics || []);
      if (currentView !== '3d') {
        renderCurrentView();
      }
    }

    function fetchInitialData() {
      fetch('/api/circuit')
        .then(res => {
          if (!res.ok) throw new Error('Network error');
          return res.json();
        })
        .then(data => updateStudio(data))
        .catch(() => {});
    }

    function connectSSE() {
      const eventSource = new EventSource('/events');
      const liveDot = document.getElementById('live-dot');
      const liveStatus = document.getElementById('live-status');

      eventSource.onopen = () => {
        liveDot.style.background = 'var(--green)';
        liveStatus.textContent = '[LIVE] SSE CONNECTED';
      };

      eventSource.onmessage = (event) => {
        try {
          const data = JSON.parse(event.data);
          updateStudio(data);
        } catch (err) {
          console.error(err);
        }
      };

      eventSource.onerror = () => {
        liveDot.style.background = 'var(--alert)';
        liveStatus.textContent = '[WAIT] RECONNECTING...';
      };
    }

    fetchInitialData();
    connectSSE();
  </script>
</body>
</html>