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/app.py

@@ -54,6 +54,9 @@ def create_app():
     from blueprints.marketplace_bp import marketplace_bp
     app.register_blueprint(marketplace_bp)
 
+    from blueprints.peer_bp import peer_bp
+    app.register_blueprint(peer_bp)
+
     # Health check
     @app.route('/pos/health')
     def health():
@@ -112,6 +115,10 @@ def create_app():
     def pos_fleet():
         return render_template('fleet.html')
 
+    @app.route('/pos/quotations')
+    def pos_quotations():
+        return render_template('quotations.html')
+
     @app.route('/pos/whatsapp')
     def pos_whatsapp():
         return render_template('whatsapp.html')