fix(po): add Submit for Approval button on draft PO detail and edit pages

A draft PO had no way to be submitted without creating a brand new PO.
Two surfaces are now fixed:

Edit page (/po/[id]/edit):
- updatePo action now accepts intent "submit" (alongside "save" and
  "resubmit"), which transitions a DRAFT PO to MGR_REVIEW, creates a
  SUBMITTED action, and fires notifications — identical behaviour to
  the new-PO submit flow
- EditPoForm shows a primary "Submit for Approval" button when the PO
  is in DRAFT status; "Resubmit for Approval" remains for EDITS_REQUESTED

PO detail page (/po/[id]):
- New submitDraftPo server action in po/[id]/actions.ts handles the
  same DRAFT → MGR_REVIEW transition without requiring the full edit form
- New SubmitDraftButton client component renders next to the Edit link
  in the detail header for DRAFT POs owned by the current user
- Button order: Edit · Submit for Approval · Discard

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

App/pelagia-portal/app/(portal)/po/[id]/actions.ts

@@ -48,6 +48,42 @@ export async function provideVendorId({
   return { ok: true };
 }
 
+export async function submitDraftPo(
+  poId: string
+): Promise<{ ok: true } | { error: string }> {
+  const session = await auth();
+  if (!session?.user) return { error: "Unauthorized" };
+
+  const po = await db.purchaseOrder.findUnique({
+    where: { id: poId },
+    include: { submitter: true },
+  });
+  if (!po) return { error: "PO not found" };
+  if (po.status !== "DRAFT") return { error: "Only draft purchase orders can be submitted." };
+  if (po.submitterId !== session.user.id && session.user.role !== "SUPERUSER") {
+    return { error: "You can only submit your own purchase orders." };
+  }
+
+  await db.purchaseOrder.update({
+    where: { id: poId },
+    data: {
+      status: "MGR_REVIEW",
+      submittedAt: new Date(),
+      actions: {
+        create: { actionType: "SUBMITTED", actorId: session.user.id },
+      },
+    },
+  });
+
+  const managers = await db.user.findMany({ where: { role: "MANAGER", isActive: true } });
+  await notify({ event: "PO_SUBMITTED", po, recipients: [po.submitter, ...managers] });
+
+  revalidatePath(`/po/${poId}`);
+  revalidatePath("/dashboard");
+  revalidatePath("/my-orders");
+  return { ok: true };
+}
+
 export async function discardDraftPo(
   poId: string
 ): Promise<{ ok: true } | { error: string }> {

App/pelagia-portal/app/(portal)/po/[id]/edit/actions.ts

@@ -41,7 +41,7 @@ export async function updatePo(
     return { error: "You can only edit your own purchase orders." };
   }
 
-  const intent = formData.get("intent") as "save" | "resubmit";
+  const intent = formData.get("intent") as "save" | "submit" | "resubmit";
 
   const parsed = createPoSchema.safeParse({
     title: formData.get("title"),
@@ -74,7 +74,9 @@ export async function updatePo(
     0
   );
 
+  const isSubmit   = intent === "submit"   && po.status === "DRAFT";
   const isResubmit = intent === "resubmit" && po.status === "EDITS_REQUESTED";
+  const shouldSubmit = isSubmit || isResubmit;
 
   // Before mutating, snapshot the current PO state so the manager can see
   // exactly what the submitter changed when they resubmit after edits requested.
@@ -150,8 +152,8 @@ export async function updatePo(
       tcPaymentTerms: data.tcPaymentTerms ?? null,
       tcOthers: data.tcOthers ?? null,
       totalAmount: total,
-      status: isResubmit ? "MGR_REVIEW" : "DRAFT",
-      submittedAt: isResubmit ? new Date() : po.submittedAt,
+      status: shouldSubmit ? "MGR_REVIEW" : "DRAFT",
+      submittedAt: shouldSubmit ? new Date() : po.submittedAt,
       lineItems: {
         deleteMany: {},
         create: data.lineItems.map((item, idx) => ({
@@ -168,18 +170,18 @@ export async function updatePo(
         })),
       },
       actions: {
-        create: isResubmit
+        create: shouldSubmit
           ? {
               actionType: "SUBMITTED",
               actorId: session.user.id,
-              ...(resubmitSnapshot ? { metadata: { editSnapshot: resubmitSnapshot } } : {}),
+              ...(isResubmit && resubmitSnapshot ? { metadata: { editSnapshot: resubmitSnapshot } } : {}),
             }
           : undefined,
       },
     },
   });
 
-  if (isResubmit) {
+  if (shouldSubmit) {
     const [fullPo, managers] = await Promise.all([
       db.purchaseOrder.findUnique({ where: { id: poId }, include: { submitter: true } }),
       db.user.findMany({ where: { role: "MANAGER", isActive: true } }),

App/pelagia-portal/app/(portal)/po/[id]/edit/edit-po-form.tsx

@@ -53,12 +53,13 @@ export function EditPoForm({ po, vessels, accounts, vendors }: Props) {
       accountId: li.accountId ?? undefined,
     }))
   );
-  const [submitting, setSubmitting] = useState<"save" | "resubmit" | null>(null);
+  const [submitting, setSubmitting] = useState<"save" | "submit" | "resubmit" | null>(null);
   const [error, setError] = useState("");
   const hasPerLineAccounts = po.lineItems.some((li) => li.accountId);
   const [multiAccount, setMultiAccount] = useState(hasPerLineAccounts);
   const [defaultAccountId, setDefaultAccountId] = useState(po.accountId ?? "");
 
+  const canSubmit   = po.status === "DRAFT";
   const canResubmit = po.status === "EDITS_REQUESTED";
 
   async function handleSubmit(intent: "save" | "resubmit") {
@@ -283,6 +284,12 @@ export function EditPoForm({ po, vessels, accounts, vendors }: Props) {
           className="rounded-lg border border-neutral-300 bg-white px-4 py-2.5 text-sm font-medium text-neutral-700 hover:bg-neutral-50 disabled:opacity-60 transition-colors">
           {submitting === "save" ? "Saving…" : "Save Draft"}
         </button>
+        {canSubmit && (
+          <button type="button" onClick={() => handleSubmit("submit")} disabled={!!submitting}
+            className="rounded-lg bg-primary-600 px-4 py-2.5 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60 transition-colors">
+            {submitting === "submit" ? "Submitting…" : "Submit for Approval"}
+          </button>
+        )}
         {canResubmit && (
           <button type="button" onClick={() => handleSubmit("resubmit")} disabled={!!submitting}
             className="rounded-lg bg-primary-600 px-4 py-2.5 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60 transition-colors">

App/pelagia-portal/components/po/po-detail.tsx

@@ -2,6 +2,7 @@ import Link from "next/link";
 import { PoStatusBadge } from "@/components/po/po-status-badge";
 import { LineItemsEditor } from "@/components/po/po-line-items-editor";
 import { DiscardDraftButton } from "@/components/po/discard-draft-button";
+import { SubmitDraftButton } from "@/components/po/submit-draft-button";
 import { formatCurrency, formatDate, formatDateTime } from "@/lib/utils";
 import { generateDownloadUrl } from "@/lib/storage";
 import { TC_FIXED_LINE } from "@/lib/validations/po";
@@ -172,6 +173,11 @@ export async function PoDetail({ po, currentUserId, currentRole, readOnly = fals
               Edit
             </Link>
           )}
+          {po.status === "DRAFT" &&
+            (po.submitter.id === currentUserId || currentRole === "SUPERUSER") &&
+            !readOnly && (
+            <SubmitDraftButton poId={po.id} />
+          )}
           {po.status === "DRAFT" &&
             (po.submitter.id === currentUserId || ["MANAGER", "SUPERUSER"].includes(currentRole)) &&
             !readOnly && (

App/pelagia-portal/components/po/submit-draft-button.tsx

@@ -0,0 +1,36 @@
+"use client";
+
+import { useState } from "react";
+import { useRouter } from "next/navigation";
+import { submitDraftPo } from "@/app/(portal)/po/[id]/actions";
+
+export function SubmitDraftButton({ poId }: { poId: string }) {
+  const router = useRouter();
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState("");
+
+  async function handleSubmit() {
+    setPending(true);
+    setError("");
+    const result = await submitDraftPo(poId);
+    if ("error" in result) {
+      setError(result.error);
+      setPending(false);
+    } else {
+      router.refresh();
+    }
+  }
+
+  return (
+    <span className="inline-flex items-center gap-2">
+      <button
+        onClick={handleSubmit}
+        disabled={pending}
+        className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60 transition-colors"
+      >
+        {pending ? "Submitting…" : "Submit for Approval"}
+      </button>
+      {error && <span className="text-xs text-danger-700">{error}</span>}
+    </span>
+  );
+}