feat: Fase 1-3 completas - precios proveedor, multi-sucursal, factura global

Fase 1: Lista de precios de proveedor
- Tabla supplier_catalog_prices en master DB
- Endpoints GET/POST/PUT/DELETE /supplier-catalog/prices
- Upload CSV/Excel de precios de proveedor
- Visualizacion de supplier_price en catalogo y POS

Fase 2: Multi-sucursal completo
- Migracion v4.0: inventory.branch_id=NULL, tabla inventory_stock
- Campos fiscales en branches (RFC, regimen, CP, serie CFDI, certificados)
- Trigger trg_update_inventory_stock para sincronizar stock por sucursal
- Backend config_bp.py con CRUD de sucursales fiscales
- Backend inventory_bp.py y pos_bp.py refactorizados para inventario compartido
- Backend invoicing_bp.py usa datos fiscales de la sucursal de la venta
- Frontend config.html/js con modal de sucursales expandido

Fase 3: Factura global mensual
- Migracion v4.1: tablas global_invoice_sales, sales.global_invoiced_at
- build_global_invoice_xml() con InformacionGlobal SAT-compliant
- Servicio global_invoice.py para agrupar ventas PUE <=000
- Endpoints POST/GET /global-invoice y /global-invoice/eligible-sales
- Frontend invoicing.html/js con boton y modal de factura global

pos/templates/catalog.html

@@ -113,6 +113,9 @@
           <span class="breadcrumb__current">Catalogo</span>
         </nav>
         <div class="header-actions" style="position:relative;">
+          <button class="btn btn--sm" id="uploadPricesBtn" onclick="CatalogApp.openUploadPricesModal()" title="Subir precios de proveedor" style="margin-right:var(--space-2);display:none;">
+            💰 Precios proveedor
+          </button>
           <div class="mode-toggle" id="modeToggle" title="Cambiar entre catalogo OEM (TecDoc), marcas locales, por marca de vehiculo y consumibles">
             <button data-mode="oem" onclick="CatalogApp.setMode('oem')" disabled style="opacity:0.5;cursor:not-allowed;" title="Próximamente">OEM 🔒</button>
             <button data-mode="local" onclick="CatalogApp.setMode('local')">Local</button>
@@ -275,6 +278,29 @@
     <button class="banner__dismiss" onclick="document.getElementById('offlineBanner').style.display='none'" aria-label="Cerrar">&times;</button>
   </div>
 
+  <!-- Upload Supplier Prices Modal -->
+  <div id="uploadPricesModal" style="display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:9500;background:rgba(0,0,0,0.6);align-items:center;justify-content:center;padding:var(--space-4);">
+    <div style="background:var(--color-surface-1);border:1px solid var(--color-border);border-radius:var(--radius-md);max-width:520px;width:100%;max-height:90vh;overflow:auto;padding:var(--space-5);">
+      <div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-4);">
+        <h2 style="margin:0;font-family:var(--font-heading);font-size:var(--text-h4);">Subir precios de proveedor</h2>
+        <button onclick="CatalogApp.closeUploadPricesModal()" style="background:none;border:none;cursor:pointer;font-size:1.4rem;color:var(--color-text-secondary);">&#10005;</button>
+      </div>
+      <p style="color:var(--color-text-secondary);font-size:var(--text-body-sm);margin-bottom:var(--space-3);">
+        Sube un CSV o Excel con las columnas: <code>supplier_name, sku, price, currency, effective_from</code>.<br>
+        El precio se mostrará en el catálogo junto a cada parte del proveedor.
+      </p>
+      <div style="margin-bottom:var(--space-3);">
+        <label style="display:block;font-size:var(--text-caption);color:var(--color-text-muted);margin-bottom:4px;">Archivo CSV / Excel</label>
+        <input type="file" id="uploadPricesFile" accept=".csv,.xlsx,.xls" style="width:100%;" />
+      </div>
+      <div style="display:flex;gap:var(--space-2);justify-content:flex-end;">
+        <a href="/pos/api/supplier-catalog/prices/template" class="btn btn--ghost" style="text-decoration:none;">Descargar plantilla</a>
+        <button class="btn btn-primary" onclick="CatalogApp.submitUploadPrices()">Subir precios</button>
+      </div>
+      <div id="uploadPricesStatus" style="margin-top:var(--space-3);font-size:var(--text-body-sm);"></div>
+    </div>
+  </div>
+
   <!-- Brand Catalog Overlay (full-screen overlay for brand-first browsing) -->
   <div id="brandCatalogOverlay" style="display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:9000;background:var(--color-bg-base);overflow:auto;padding:var(--space-4);">
     <div style="max-width:1200px;margin:0 auto;">
@@ -295,7 +321,7 @@
   <script src="/pos/static/js/splash-loader.js?v=1" defer></script>
   <script src="/pos/static/js/pos-utils.js?v=2" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
-  <script src="/pos/static/js/catalog.js?v=5" defer></script>
+  <script src="/pos/static/js/catalog.js?v=6" defer></script>
   <script src="/pos/static/js/offline-banner.js" defer></script>
   <script src="/pos/static/js/chat.js" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>

pos/templates/config.html

@@ -718,19 +718,48 @@
        MODALS
        ===================================================================== -->
 
-  <!-- Modal: Nueva Sucursal -->
+  <!-- Modal: Nueva / Editar Sucursal -->
   <div class="cfg-modal-overlay" id="modal-branch" style="display:none;">
-    <div class="cfg-modal">
+    <div class="cfg-modal" style="max-width:640px;">
       <div class="cfg-modal__header">
-        <h3 class="cfg-modal__title">Nueva Sucursal</h3>
+        <h3 class="cfg-modal__title" id="branch-modal-title">Nueva Sucursal</h3>
         <button class="cfg-modal__close" onclick="Config.closeModal('modal-branch')">&times;</button>
       </div>
       <div class="cfg-modal__body">
+        <input type="hidden" id="branch-id" value="" />
         <div class="form-grid">
           <div class="form-group form-group--full">
-            <label class="form-label">Nombre</label>
+            <label class="form-label">Nombre *</label>
             <input class="form-input" id="branch-name" type="text" placeholder="Ej. Sucursal Norte" />
           </div>
+          <div class="form-group">
+            <label class="form-label">RFC</label>
+            <input class="form-input" id="branch-rfc" type="text" placeholder="ABC010101ABC" maxlength="13" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Razon Social</label>
+            <input class="form-input" id="branch-razon" type="text" placeholder="Razon social fiscal" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Regimen Fiscal</label>
+            <input class="form-input" id="branch-regimen" type="text" placeholder="601" maxlength="10" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Codigo Postal</label>
+            <input class="form-input" id="branch-cp" type="text" placeholder="00000" maxlength="5" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Serie CFDI</label>
+            <input class="form-input" id="branch-serie" type="text" placeholder="A" maxlength="10" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Folio Inicial</label>
+            <input class="form-input" id="branch-folio" type="number" placeholder="1" />
+          </div>
+          <div class="form-group">
+            <label class="form-label">Licencia Fiscal</label>
+            <input class="form-input" id="branch-licencia" type="text" placeholder="Opcional" />
+          </div>
           <div class="form-group form-group--full">
             <label class="form-label">Direccion</label>
             <input class="form-input" id="branch-address" type="text" placeholder="Calle, Colonia, Ciudad" />
@@ -739,6 +768,20 @@
             <label class="form-label">Telefono</label>
             <input class="form-input" id="branch-phone" type="tel" placeholder="(55) 1234-5678" />
           </div>
+          <div class="form-group form-group--full">
+            <label class="form-check" style="display:flex;align-items:center;gap:8px;cursor:pointer;">
+              <input type="checkbox" id="branch-main" style="width:auto;" />
+              <span>Sucursal principal (datos fiscales por defecto)</span>
+            </label>
+          </div>
+          <div class="form-group form-group--full">
+            <label class="form-label">Certificado PEM (opcional)</label>
+            <textarea class="form-input" id="branch-cert" rows="3" placeholder="-----BEGIN CERTIFICATE-----"></textarea>
+          </div>
+          <div class="form-group form-group--full">
+            <label class="form-label">Llave PEM (opcional)</label>
+            <textarea class="form-input" id="branch-key" rows="3" placeholder="-----BEGIN PRIVATE KEY-----"></textarea>
+          </div>
         </div>
       </div>
       <div class="cfg-modal__footer">
@@ -808,7 +851,7 @@
   <script src="/pos/static/js/pos-utils.js?v=2" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
   <script src="/pos/static/js/kiosk.js" defer></script>
-  <script src="/pos/static/js/config.js?v=2" defer></script>
+  <script src="/pos/static/js/config.js?v=3" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
   <script src="/pos/static/js/pwa-install.js" defer></script>

pos/templates/invoicing.html

@@ -356,6 +356,16 @@
 
             <div class="toolbar__spacer"></div>
 
+            <button class="btn btn--primary" onclick="Invoicing.openGlobalInvoiceModal()">
+              <svg viewBox="0 0 24 24" style="width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;">
+                <rect x="3" y="4" width="18" height="18" rx="2" ry="2"/>
+                <line x1="16" y1="2" x2="16" y2="6"/>
+                <line x1="8" y1="2" x2="8" y2="6"/>
+                <line x1="3" y1="10" x2="21" y2="10"/>
+              </svg>
+              Factura Global
+            </button>
+
             <button class="btn btn--ghost">
               <svg viewBox="0 0 24 24">
                 <path d="M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4"/>
@@ -1057,7 +1067,7 @@
   <script src="/pos/static/js/splash-loader.js?v=1" defer></script>
   <script src="/pos/static/js/pos-utils.js?v=2" defer></script>
   <script src="/pos/static/js/sidebar.js" defer></script>
-  <script src="/pos/static/js/invoicing.js" defer></script>
+  <script src="/pos/static/js/invoicing.js?v=2" defer></script>
   <script src="/pos/static/js/sync-engine.js" defer></script>
   <script>if('serviceWorker' in navigator){navigator.serviceWorker.register('/pos/sw.js',{scope:'/pos/'});}</script>
   <script src="/pos/static/js/pwa-install.js" defer></script>
@@ -1091,5 +1101,40 @@
     window.loadInvoicingStats = loadInvoicingStats;
     loadInvoicingStats();
   </script>
+
+  <!-- =====================================================================
+       MODAL: FACTURA GLOBAL
+       ===================================================================== -->
+  <div class="modal-overlay" id="modalGlobalInvoice" style="display:none; position:fixed; inset:0; z-index:var(--z-modal); background:var(--overlay-backdrop); align-items:center; justify-content:center;">
+    <div class="modal-card" style="background:var(--color-bg-elevated); border:1px solid var(--color-border); border-radius:var(--radius-lg); width:480px; max-width:95vw; box-shadow:var(--shadow-xl);">
+      <div style="display:flex; align-items:center; justify-content:space-between; padding:var(--space-5) var(--space-6); border-bottom:1px solid var(--color-border);">
+        <div>
+          <div style="font-weight:var(--font-weight-semibold); font-size:var(--text-body-lg);">Generar Factura Global</div>
+          <div style="font-size:var(--text-caption); color:var(--color-text-muted); margin-top:2px;">Agrupa ventas de contado no facturadas</div>
+        </div>
+        <button onclick="document.getElementById('modalGlobalInvoice').style.display='none'" style="background:none; border:none; color:var(--color-text-muted); font-size:1.4rem; cursor:pointer; padding:var(--space-2);">✕</button>
+      </div>
+      <div style="padding:var(--space-5) var(--space-6);">
+        <div style="display:flex; gap:var(--space-3); margin-bottom:var(--space-4);">
+          <div style="flex:1;">
+            <label style="font-size:var(--text-caption); color:var(--color-text-muted); display:block; margin-bottom:var(--space-1);">Año</label>
+            <input type="number" id="global-year" class="form-input" style="width:100%;" />
+          </div>
+          <div style="flex:1;">
+            <label style="font-size:var(--text-caption); color:var(--color-text-muted); display:block; margin-bottom:var(--space-1);">Mes</label>
+            <input type="number" id="global-month" class="form-input" style="width:100%;" min="1" max="12" />
+          </div>
+        </div>
+        <div id="global-preview" style="background:var(--color-surface); border-radius:var(--radius-md); padding:var(--space-3); font-size:var(--text-caption); color:var(--color-text-muted);">
+          Presiona "Vista previa" para ver ventas elegibles.
+        </div>
+      </div>
+      <div style="display:flex; gap:var(--space-3); justify-content:flex-end; padding:var(--space-4) var(--space-6); border-top:1px solid var(--color-border);">
+        <button onclick="document.getElementById('modalGlobalInvoice').style.display='none'" class="btn btn--ghost">Cancelar</button>
+        <button onclick="Invoicing.previewGlobalInvoice()" class="btn btn--ghost">Vista previa</button>
+        <button onclick="Invoicing.generateGlobalInvoice()" class="btn btn--primary">Generar</button>
+      </div>
+    </div>
+  </div>
 </body>
 </html>

pos/templates/pos.html

@@ -206,6 +206,7 @@
 
         <!-- Secondary Actions -->
         <div class="secondary-actions" role="toolbar" aria-label="Acciones secundarias">
+          <button class="btn-secondary-action" onclick="POS.modifyPrice()" title="Modificar precio">Mod.Precio</button>
           <button class="btn-secondary-action" onclick="POS.saveQuotation()" title="Cotizacion (F4)">Cotizar</button>
           <button class="btn-secondary-action" onclick="POS.showLastSale()" title="Ultima venta (F5)">Ult.Venta</button>
           <button class="btn-secondary-action" onclick="POS.showCutZModal()" title="Corte Z - Cerrar caja">Corte Z</button>
@@ -570,7 +571,7 @@
   <script src="/pos/static/js/splash-loader.js?v=1" defer></script>
   <script src="/pos/static/js/push.js" defer></script>
   <script src="/pos/static/js/printer.js" defer></script>
-  <script src="/pos/static/js/pos.js?v=6" defer></script>
+  <script src="/pos/static/js/pos.js?v=7" defer></script>
 
   <script>
     // Cancel sale button wiring