feat(portal): complete masterplan with deterministic budget simulator, RAG assistant, agency cross-tenant view and multi-tenant middleware

src/app/api/chat/route.ts

@@ -19,6 +19,79 @@ export async function POST(req: NextRequest) {
     'Content-Type': 'application/json'
   };
 
+  // 0. Intención: Simulación Determinista "¿Qué pasa si...?"
+  if (userMessage.includes('simul') || userMessage.includes('invierto') || userMessage.includes('pasa si') || userMessage.includes('proyec')) {
+    try {
+      // Extraer importe numérico
+      const matchNumber = userMessage.match(/(\d+[\d\.,]*)/);
+      let amount = 1000;
+      if (matchNumber) {
+        amount = parseFloat(matchNumber[1].replace(/\./g, '').replace(',', '.'));
+      }
+
+      let channel: string | null = null;
+      if (userMessage.includes('meta') || userMessage.includes('facebook') || userMessage.includes('instagram')) channel = 'meta';
+      else if (userMessage.includes('google')) channel = 'google';
+      else if (userMessage.includes('tiktok')) channel = 'tiktok';
+
+      const res = await fetch(`${supabaseUrl}/rest/v1/rpc/simulate_budget`, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify({
+          p_tenant_id: tenantId,
+          p_additional_spend: amount,
+          p_target_channel: channel
+        })
+      });
+
+      if (res.ok) {
+        const sim = await res.json();
+        const p10 = sim.conservative_p10 || {};
+        const p50 = sim.expected_p50 || {};
+        const p90 = sim.optimistic_p90 || {};
+        const base = sim.baseline || {};
+
+        const text = `🔮 **Simulación de Inversión Adicional (${amount.toLocaleString('es-ES')} € en ${sim.target_channel.toUpperCase()}):**\n\n` +
+          `*Métricas Base Reales:* CPL ${base.historical_cpl} €, Tasa de Cierre ${base.conversion_rate_pct}%, Ticket Medio ${Number(base.avg_ticket || 0).toLocaleString('es-ES')} €.\n\n` +
+          `- **Escenario Esperado (p50):** +${p50.leads} leads, +${p50.deals} clientes, **+${Number(p50.revenue || 0).toLocaleString('es-ES')} €** (ROAS ${p50.roas}x)\n` +
+          `- **Escenario Conservador (p10):** +${p10.leads} leads, +${p10.deals} clientes, **+${Number(p10.revenue || 0).toLocaleString('es-ES')} €** (ROAS ${p10.roas}x)\n` +
+          `- **Escenario Optimista (p90):** +${p90.leads} leads, +${p90.deals} clientes, **+${Number(p90.revenue || 0).toLocaleString('es-ES')} €** (ROAS ${p90.roas}x)\n\n` +
+          `*Proyección calculada matemáticamente sin alucinaciones con la RPC simulate_budget.*`;
+        return Response.json([{ text }]);
+      }
+    } catch (e) {
+      console.error('Error in simulate_budget chat:', e);
+    }
+  }
+
+  // 0.5 Intención: RAG Documental Híbrido (Documentos / Copys / Informes)
+  if (userMessage.includes('document') || userMessage.includes('copy') || userMessage.includes('informe') || userMessage.includes('brief') || userMessage.includes('contenido') || userMessage.includes('activo')) {
+    try {
+      const res = await fetch(`${supabaseUrl}/rest/v1/rpc/match_documents`, {
+        method: 'POST',
+        headers,
+        body: JSON.stringify({
+          p_tenant_id: tenantId,
+          p_query_text: userMessage,
+          p_match_count: 3
+        })
+      });
+      if (res.ok) {
+        const matches = await res.json();
+        if (Array.isArray(matches) && matches.length > 0) {
+          const excerpts = matches.map((m: any) => 
+            `📄 **${m.document_title}** (${m.document_type.toUpperCase()}):\n> ${m.chunk_text.replace(/\n/g, '\n> ')}`
+          ).join('\n\n');
+
+          const text = `📚 **Fragmentos Recuperados de la Biblioteca de Activos (RAG Híbrido):**\n\n${excerpts}\n\n*Fuente: Búsqueda vectorial y de texto completo en document_chunks.*`;
+          return Response.json([{ text }]);
+        }
+      }
+    } catch (e) {
+      console.error('Error in match_documents chat:', e);
+    }
+  }
+
   // 1. Intención: Objetivos vs Real / Estrategia
   if (userMessage.includes('objetivo') || userMessage.includes('meta') || userMessage.includes('factura') || userMessage.includes('estrategia')) {
     try {

src/app/api/simulate/route.ts

@@ -0,0 +1,37 @@
+import { NextRequest } from 'next/server';
+
+export async function POST(req: NextRequest) {
+  const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL || 'https://supabase.4ventures.es';
+  const serviceKey = process.env.SUPABASE_SERVICE_ROLE_KEY || process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY || '';
+  const tenantId = process.env.DEFAULT_TENANT_ID || '0b3c5fc0-6901-4caf-b26a-b6a0201d8541';
+
+  try {
+    const body = await req.json();
+    const spend = parseFloat(body.spend || 1000);
+    const channel = body.channel || 'meta';
+
+    const res = await fetch(`${supabaseUrl}/rest/v1/rpc/simulate_budget`, {
+      method: 'POST',
+      headers: {
+        apikey: serviceKey,
+        Authorization: `Bearer ${serviceKey}`,
+        'Content-Type': 'application/json'
+      },
+      body: JSON.stringify({
+        p_tenant_id: tenantId,
+        p_additional_spend: spend,
+        p_target_channel: channel === 'blended' ? null : channel
+      })
+    });
+
+    if (res.ok) {
+      const data = await res.json();
+      return Response.json(data);
+    } else {
+      const err = await res.text();
+      return Response.json({ error: err }, { status: 500 });
+    }
+  } catch (e: any) {
+    return Response.json({ error: e.message }, { status: 500 });
+  }
+}