OPCIÓN C + A1: Consolidación técnica + orjson

C1: Materialized view part_vehicle_preview (creación en progreso)
- Migración v3.3_materialized_view.sql
- catalog_service.py y dashboard/server.py ahora usan la MV
- Script refresh_part_vehicle_preview.py + warm_vehicle_cache.py actualizado

C2: Fix cache warming script (autónomo)
- Auto-re-ejecuta con sudo -u postgres si peer auth falla
- Args CLI: --dsn, --batch-size, --ttl, --dry-run

C3: CSS dinámico residual extraído
- sidebar.js → sidebar.css (nuevo)
- pos-utils.js → common.css (nuevo)
- Links agregados a 14 templates POS

C4: Script de load testing básico
- scripts/load_test.py: métricas p50/p95/p99, throughput, errores

C5: Documentación actualizada
- FASES_IMPLEMENTADAS.md: test count real, FASE 7 completa
- performance_audit_2026.md: anexo post-FASE 7, métricas actualizadas

A1: Serialización orjson
- pos/json_provider.py: DefaultJSONProvider con orjson.dumps/loads
- Aplicado a POS app y Dashboard server
- Fix indentation error en pos_bp.py

Tests: 73/73 pasando

pos/static/js/sidebar.js

@@ -106,48 +106,6 @@
         + '  </button>'
         + '</div>';
 
-    // CSS matching the design system
-    var css = document.createElement('style');
-    css.textContent = [
-        '.pos-sidebar{position:fixed;top:0;left:0;bottom:0;width:260px;display:flex;flex-direction:column;background:var(--color-bg-elevated);border-right:1px solid var(--color-border);z-index:100;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--scrollbar-thumb,#444) var(--scrollbar-track,#222);font-family:var(--font-body)}',
-        '.pos-sidebar::-webkit-scrollbar{width:4px}',
-        '.pos-sidebar::-webkit-scrollbar-track{background:var(--scrollbar-track,#222)}',
-        '.pos-sidebar::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb,#444);border-radius:99px}',
-
-        '.sidebar__brand{display:flex;align-items:center;gap:var(--space-3,12px);padding:var(--space-4,16px) var(--space-4,16px) var(--space-3,12px);border-bottom:1px solid var(--color-border);flex-shrink:0}',
-        '.brand-logo{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:var(--color-primary);color:var(--color-text-inverse,#fff);font-family:var(--font-heading);font-weight:800;font-size:1rem;letter-spacing:-0.04em;flex-shrink:0}',
-        '[data-theme="industrial"] .brand-logo{clip-path:polygon(0 0,calc(100% - 9px) 0,100% 9px,100% 100%,0 100%)}',
-        '[data-theme="modern"] .brand-logo{border-radius:var(--radius-md,8px)}',
-        '.brand-name__primary{font-family:var(--font-heading);font-weight:800;font-size:0.9375rem;letter-spacing:var(--tracking-wide,0.02em);text-transform:uppercase;color:var(--color-text-primary);line-height:1}',
-        '.brand-name__sub{font-size:var(--text-caption,0.75rem);color:var(--color-text-muted);letter-spacing:var(--tracking-wider,0.04em);text-transform:uppercase;margin-top:2px}',
-
-        '.sidebar__nav{flex:1;padding:var(--space-3,12px) 0}',
-        '.nav-section-label{padding:var(--space-3,12px) var(--space-4,16px) var(--space-1,4px);font-size:0.6875rem;font-weight:600;letter-spacing:var(--tracking-widest,0.08em);text-transform:uppercase;color:var(--color-text-muted)}',
-        '.nav-item{display:flex;align-items:center;gap:var(--space-3,12px);padding:var(--space-2,8px) var(--space-4,16px);color:var(--color-text-secondary);text-decoration:none;font-size:var(--text-body-sm,0.875rem);font-weight:400;border-left:3px solid transparent;transition:all 0.15s;cursor:pointer}',
-        '.nav-item:hover{background:var(--color-surface-2,rgba(255,255,255,0.04));color:var(--color-text-primary)}',
-        '.nav-item.is-active{background:var(--color-primary-muted,rgba(245,166,35,0.12));color:var(--color-primary);border-left-color:var(--color-primary);font-weight:600}',
-        '.nav-item__icon{width:18px;height:18px;flex-shrink:0;opacity:0.7}',
-        '.nav-item.is-active .nav-item__icon{opacity:1}',
-
-        '.sidebar__theme-toggle,.sidebar__lang-toggle{display:flex;gap:4px;padding:8px 16px;border-top:1px solid var(--color-border)}',
-        '.theme-toggle-btn,.lang-toggle-btn{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:6px;border:1px solid var(--color-border);border-radius:var(--radius-sm,4px);background:none;color:var(--color-text-muted);cursor:pointer;transition:all 0.15s;font-size:0.75rem}',
-        '.theme-toggle-btn:hover,.lang-toggle-btn:hover{color:var(--color-text-primary);background:var(--color-surface-2,rgba(255,255,255,0.04))}',
-        '.theme-toggle-btn.is-active,.lang-toggle-btn.is-active{background:var(--color-primary-muted,rgba(245,166,35,0.12));color:var(--color-primary);border-color:var(--color-primary)}',
-        '.lang-flag{font-weight:700;font-size:0.625rem;letter-spacing:0.04em}',
-
-        '.sidebar__footer{padding:var(--space-3,12px) var(--space-4,16px);border-top:1px solid var(--color-border);display:flex;align-items:center;gap:var(--space-2,8px)}',
-        '.sidebar__user-avatar{width:28px;height:28px;border-radius:50%;background:var(--color-primary);color:var(--color-text-inverse,#fff);display:flex;align-items:center;justify-content:center;font-size:0.6875rem;font-weight:700;flex-shrink:0}',
-        '.sidebar__user-info{flex:1;overflow:hidden}',
-        '.sidebar__user-name{font-size:var(--text-body-sm,0.875rem);font-weight:600;color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}',
-        '.sidebar__user-role{font-size:var(--text-caption,0.75rem);color:var(--color-text-muted)}',
-        '.sidebar__logout-btn{background:none;border:1px solid var(--color-border);border-radius:var(--radius-sm,4px);padding:4px 6px;cursor:pointer;color:var(--color-text-muted);transition:all 0.15s;display:flex;align-items:center}',
-        '.sidebar__logout-btn:hover{color:var(--color-error,#F85149);border-color:var(--color-error,#F85149)}',
-
-        '.pos-main-offset{margin-left:260px}',
-        '@media(max-width:768px){.pos-sidebar{width:56px}.brand-name,.nav-item span,.sidebar__user-info,.nav-section-label,.sidebar__theme-toggle,.sidebar__lang-toggle{display:none}.sidebar__brand{justify-content:center;padding:12px 8px}.sidebar__footer{flex-direction:column;padding:8px}.pos-main-offset{margin-left:56px}}',
-    ].join('\n');
-    document.head.appendChild(css);
-
     // Replace existing sidebar
     var existing = document.querySelector('aside.sidebar, .sidebar, #sidebar');
     if (existing) {