chore: add pending ui to signing completion page (#2224)

Adds a pending UI state to the signing completion page for when all
recipients have finished signing but the document hasn't completed the
sealing background job.

<img width="695" height="562" alt="image"
src="https://github.com/user-attachments/assets/b015bc38-9489-4baa-ac0a-07cb1ac24b25"
/>

packages/trpc/server/envelope-router/signing-status-envelope.ts

@@ -0,0 +1,82 @@
+import { DocumentStatus, EnvelopeType, RecipientRole, SigningStatus } from '@prisma/client';
+
+import { AppError, AppErrorCode } from '@documenso/lib/errors/app-error';
+import { prisma } from '@documenso/prisma';
+
+import { maybeAuthenticatedProcedure } from '../trpc';
+import {
+  ZSigningStatusEnvelopeRequestSchema,
+  ZSigningStatusEnvelopeResponseSchema,
+} from './signing-status-envelope.types';
+
+// Internal route - not intended for public API usage
+export const signingStatusEnvelopeRoute = maybeAuthenticatedProcedure
+  .input(ZSigningStatusEnvelopeRequestSchema)
+  .output(ZSigningStatusEnvelopeResponseSchema)
+  .query(async ({ input, ctx }) => {
+    const { token } = input;
+
+    ctx.logger.info({
+      input: {
+        token,
+      },
+    });
+
+    const envelope = await prisma.envelope.findFirst({
+      where: {
+        type: EnvelopeType.DOCUMENT,
+        recipients: {
+          some: {
+            token,
+          },
+        },
+      },
+      include: {
+        recipients: {
+          select: {
+            id: true,
+            name: true,
+            email: true,
+            signingStatus: true,
+            role: true,
+          },
+        },
+      },
+    });
+
+    if (!envelope) {
+      throw new AppError(AppErrorCode.NOT_FOUND, {
+        message: 'Envelope not found',
+      });
+    }
+
+    // Check if envelope is rejected
+    if (envelope.status === DocumentStatus.REJECTED) {
+      return {
+        status: 'REJECTED',
+      };
+    }
+
+    if (envelope.status === DocumentStatus.COMPLETED) {
+      return {
+        status: 'COMPLETED',
+      };
+    }
+
+    const isComplete =
+      envelope.recipients.some((recipient) => recipient.signingStatus === SigningStatus.REJECTED) ||
+      envelope.recipients.every(
+        (recipient) =>
+          recipient.role === RecipientRole.CC || recipient.signingStatus === SigningStatus.SIGNED,
+      );
+
+    if (isComplete) {
+      return {
+        status: 'PROCESSING',
+      };
+    }
+
+    return {
+      status: 'PENDING',
+    };
+  });