feat: complete session — catalog, marketplace, WhatsApp, peer-to-peer, install scripts

Major features:
- Pixel-Perfect glassmorphism design (landing + POS + public catalog)
- OEM/Local catalog toggle with Nexpart taxonomy (14 groups, 108 subgroups, 558 part types)
- Marketplace B2B Phase 1 (bodegas, POs, status machine, WA+email notifications)
- Peer-to-peer inventory (multi-instance, LAN discovery)
- WhatsApp: photo→Vision AI, voice→Whisper, conversational quotations
- Smart unified search (VIN/plate/part_number/keyword auto-detect)
- Shop Supplies tab (vehicle-independent parts)
- Chatbot AI fallback chain (5 models) + response cache
- CSV inventory import tool + setup_instance.sh installer
- Tablet-responsive CSS + sidebar toggle
- Filters, export CSV, employee edit, business data save
- Quotation system (WA→POS) with auto-print on confirmation
- Live stats on landing page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pos/static/js/reports.js

@@ -715,3 +715,39 @@ const Reports = (() => {
         loadVentas, loadInventario, loadClientes, loadFinancieros, fmt
     };
 })();
+
+// ── Global: Export visible table as CSV (Excel-compatible) ──
+function exportReportCSV() {
+    var tables = document.querySelectorAll('table');
+    // Find the first visible table
+    var table = null;
+    for (var i = 0; i < tables.length; i++) {
+        var t = tables[i];
+        if (t.offsetParent !== null && t.querySelector('tbody tr')) {
+            table = t;
+            break;
+        }
+    }
+    if (!table) {
+        alert('No hay tabla de datos para exportar en esta vista.');
+        return;
+    }
+    var rows = [];
+    var ths = table.querySelectorAll('thead th');
+    if (ths.length) {
+        rows.push(Array.from(ths).map(function(th) { return '"' + th.textContent.trim().replace(/"/g, '""') + '"'; }).join(','));
+    }
+    table.querySelectorAll('tbody tr').forEach(function(tr) {
+        var cells = tr.querySelectorAll('td');
+        rows.push(Array.from(cells).map(function(td) { return '"' + td.textContent.trim().replace(/"/g, '""') + '"'; }).join(','));
+    });
+    if (rows.length <= 1) { alert('La tabla esta vacia.'); return; }
+    var csv = rows.join('\n');
+    var blob = new Blob(['\uFEFF' + csv], { type: 'text/csv;charset=utf-8;' });
+    var url = URL.createObjectURL(blob);
+    var a = document.createElement('a');
+    a.href = url;
+    a.download = 'reporte_nexus_' + new Date().toISOString().slice(0, 10) + '.csv';
+    a.click();
+    URL.revokeObjectURL(url);
+}