feat: LinkedIn editorial, accesos agencia estables y deshacer en historial

Integra estrategias LinkedIn en calendarios (backlog publicado vs pendiente), unifica roles/cookies de vista agencia y permite deshacer cambios de brandbook dejando constancia en el historial.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/api/calendar/linkedin-strategy/route.ts

@@ -0,0 +1,116 @@
+/**
+ * GET — resolve LinkedIn strategy URL + summary for active tenant
+ * (brandbook URL, known slug map, optional ?url= override).
+ * Used by CalendarCreator / zoom to show associated strategy content.
+ */
+import { NextRequest, NextResponse } from 'next/server';
+import { createClient } from '@/lib/supabase/server';
+import { resolveActiveTenant, restGet } from '@/lib/tenant-context';
+import { isAgencyRole, userRole } from '@/lib/agency';
+import {
+  BRANDBOOK_DOC_TYPE,
+  parseBrandbook,
+} from '@/lib/brandbook';
+import {
+  loadLinkedInStrategyContext,
+  resolveLinkedInStrategyUrl,
+} from '@/lib/linkedin-strategy';
+
+export const dynamic = 'force-dynamic';
+export const maxDuration = 45;
+
+export async function GET(req: NextRequest) {
+  const supabase = await createClient();
+  const {
+    data: { user },
+  } = await supabase.auth.getUser();
+  if (!user) {
+    return NextResponse.json({ error: 'Unauthorized' }, { status: 401 });
+  }
+  if (!isAgencyRole(userRole(user))) {
+    return NextResponse.json({ error: 'Solo agencia' }, { status: 403 });
+  }
+  const ctx = await resolveActiveTenant(user);
+  if (!ctx.tenantId || ctx.portfolioWide) {
+    return NextResponse.json(
+      { error: 'Selecciona un cliente en Contexto.' },
+      { status: 400 }
+    );
+  }
+
+  const override = req.nextUrl.searchParams.get('url') || '';
+  const postId = req.nextUrl.searchParams.get('post_id') || '';
+
+  let slug = 'cliente';
+  const t = await restGet<{ slug?: string }[]>(
+    `/rest/v1/tenants?id=eq.${encodeURIComponent(ctx.tenantId)}&select=slug`
+  );
+  slug = t.data?.[0]?.slug || ctx.label.toLowerCase().replace(/\s+/g, '-');
+
+  const bb = await restGet<{ content?: unknown }[]>(
+    `/rest/v1/documents?tenant_id=eq.${encodeURIComponent(
+      ctx.tenantId
+    )}&type=eq.${BRANDBOOK_DOC_TYPE}&select=content&order=updated_at.desc&limit=1`
+  );
+  const brandbook = parseBrandbook(bb.data?.[0]?.content);
+
+  const url = resolveLinkedInStrategyUrl({
+    brandbook,
+    slug,
+    overrideUrl: override,
+  });
+
+  if (!url) {
+    return NextResponse.json({
+      ok: true,
+      url: null,
+      brandbook_url: brandbook?.linkedin_strategy_url || null,
+      posts: [],
+      themes: brandbook?.linkedin_themes || [],
+      formats: brandbook?.linkedin_formats || [],
+      ctas: brandbook?.linkedin_cta || [],
+      message: 'Sin URL de estrategia LinkedIn en brandbook ni mapa conocido.',
+    });
+  }
+
+  const ctxLi = await loadLinkedInStrategyContext({
+    url,
+    brandbook,
+    mode: 'from_strategy',
+  });
+
+  const posts = (ctxLi?.posts || []).map((p) => ({
+    id: p.id,
+    n: p.n,
+    title: p.title,
+    meta: p.meta,
+    angle: p.angle,
+    body_preview: (p.body || '').slice(0, 500),
+    body: postId && p.id === postId ? p.body : undefined,
+  }));
+
+  let selected = postId
+    ? ctxLi?.posts.find((p) => p.id === postId) || null
+    : null;
+
+  return NextResponse.json({
+    ok: true,
+    url,
+    brandbook_url: brandbook?.linkedin_strategy_url || null,
+    posts_count: ctxLi?.posts.length || 0,
+    posts: posts.slice(0, 80),
+    selected: selected
+      ? {
+          id: selected.id,
+          title: selected.title,
+          meta: selected.meta,
+          angle: selected.angle,
+          body: selected.body,
+        }
+      : null,
+    themes: brandbook?.linkedin_themes || [],
+    formats: brandbook?.linkedin_formats || [],
+    ctas: brandbook?.linkedin_cta || [],
+    thought_leadership: brandbook?.thought_leadership || [],
+  });
+}