production: reminder cron, dashboard overhaul, shadcn components, setup wizard

- /api/cron/reminders: processes pending reminders every 15min, sends WhatsApp with email fallback
- /api/cron/overdue: marks overdue pledges daily (7d deferred, 14d immediate)
- /api/pledges: GET handler with filtering, search, pagination, sort by dueDate
- Dashboard overview: stats, collection progress bar, needs attention, upcoming payments
- Dashboard pledges: proper table with status tabs, search, actions, pagination
- New shadcn components: Table, Tabs, DropdownMenu, Progress
- Setup wizard: 4-step onboarding (org → bank → event → QR code)
- Settings API: PUT handler for org create/update
- Org resolver: single-tenant fallback to first org
- Cron jobs installed: reminders every 15min, overdue check at 6am
- Auto-generates installment dates when not provided
- HOSTNAME=0.0.0.0 in compose for multi-network binding

pledge-now-pay-later/src/lib/org.ts

@@ -3,27 +3,37 @@ import prisma from "@/lib/prisma"
 /**
  * Resolve organization ID from x-org-id header.
  * The header may contain a slug or a direct ID — we try slug first, then ID.
+ * Falls back to first org if none specified (single-tenant mode).
  */
 export async function resolveOrgId(headerValue: string | null): Promise<string | null> {
+  if (!prisma) return null
   const val = headerValue?.trim()
-  if (!val) return null
 
-  // Try by slug first (most common from frontend)
-  const bySlug = await prisma.organization.findFirst({
-    where: {
-      OR: [
-        { slug: val },
-        { slug: { startsWith: val } },
-      ],
-    },
-    select: { id: true },
-  })
-  if (bySlug) return bySlug.id
+  if (val && val !== "demo") {
+    // Try by slug first (most common from frontend)
+    const bySlug = await prisma.organization.findFirst({
+      where: {
+        OR: [
+          { slug: val },
+          { slug: { startsWith: val } },
+        ],
+      },
+      select: { id: true },
+    })
+    if (bySlug) return bySlug.id
 
-  // Try direct ID
-  const byId = await prisma.organization.findUnique({
-    where: { id: val },
+    // Try direct ID
+    const byId = await prisma.organization.findUnique({
+      where: { id: val },
+      select: { id: true },
+    })
+    if (byId) return byId.id
+  }
+
+  // Single-tenant fallback: use first org
+  const first = await prisma.organization.findFirst({
     select: { id: true },
+    orderBy: { createdAt: "asc" },
   })
-  return byId?.id ?? null
+  return first?.id ?? null
 }