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/templates/reports.html

@@ -6,6 +6,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0" />
   <title>Reportes — Nexus Autoparts POS</title>
   <link rel="stylesheet" href="/pos/static/css/tokens.css" />
+  <link rel="stylesheet" href="/pos/static/css/pos-glass.css" />
   <link rel="manifest" href="/pos/static/pwa/manifest.json" />
   <meta name="theme-color" content="#F5A623" />
 
@@ -1690,17 +1691,17 @@
           <h1 class="content-header__title">Reportes</h1>
         </div>
         <div class="content-header__actions">
-          <button class="btn btn-ghost">
+          <button class="btn btn-ghost" onclick="exportReportCSV()">
             <svg viewBox="0 0 14 14" fill="none" stroke="currentColor" stroke-width="1.5" width="14" height="14">
               <rect x="1" y="1" width="12" height="12" rx="1"/><line x1="4" y1="5" x2="10" y2="5"/><line x1="4" y1="8" x2="8" y2="8"/>
             </svg>
-            Exportar Excel
+            Exportar Excel (CSV)
           </button>
-          <button class="btn btn-primary">
+          <button class="btn btn-primary" onclick="window.print()">
             <svg viewBox="0 0 14 14" fill="none" stroke="currentColor" stroke-width="1.5" width="14" height="14">
               <rect x="2" y="1" width="10" height="12" rx="1"/><line x1="5" y1="5" x2="9" y2="5"/><line x1="5" y1="7" x2="9" y2="7"/><line x1="5" y1="9" x2="7" y2="9"/>
             </svg>
-            Exportar PDF
+            Exportar PDF (Imprimir)
           </button>
         </div>
       </div>
@@ -1848,6 +1849,7 @@
 
   <script src="/pos/static/js/i18n.js"></script>
   <script src="/pos/static/js/app-init.js"></script>
+  <script src="/pos/static/js/pos-utils.js"></script>
   <script src="/pos/static/js/sidebar.js"></script>
   <script src="/pos/static/js/reports.js"></script>
   <script src="/pos/static/js/sync-engine.js"></script>