feat: dictate next signer (#1719)

Adds next recipient dictation functionality to document signing flow,
allowing assistants and signers to update the next recipient's
information during the signing process.

## Related Issue

N/A

## Changes Made

- Added form handling for next recipient dictation in signing dialogs
- Implemented UI for updating next recipient information
- Added e2e tests covering dictation scenarios:
  - Regular signing with dictation enabled
  - Assistant role with dictation
  - Parallel signing flow
  - Disabled dictation state

## Testing Performed

- Added comprehensive e2e tests covering:
  - Sequential signing with dictation
  - Assistant role dictation
  - Parallel signing without dictation
  - Form validation and state management
- Tested on Chrome and Firefox
- Verified recipient state updates in database

packages/api/v1/schema.ts

@@ -155,6 +155,7 @@ export const ZCreateDocumentMutationSchema = z.object({
         }),
       redirectUrl: z.string(),
       signingOrder: z.nativeEnum(DocumentSigningOrder).optional(),
+      allowDictateNextSigner: z.boolean().optional(),
       language: z.enum(SUPPORTED_LANGUAGE_CODES).optional(),
       typedSignatureEnabled: z.boolean().optional().default(true),
       distributionMethod: z.nativeEnum(DocumentDistributionMethod).optional(),
@@ -218,6 +219,7 @@ export const ZCreateDocumentFromTemplateMutationSchema = z.object({
       dateFormat: z.string(),
       redirectUrl: z.string(),
       signingOrder: z.nativeEnum(DocumentSigningOrder).optional(),
+      allowDictateNextSigner: z.boolean().optional(),
       language: z.enum(SUPPORTED_LANGUAGE_CODES).optional(),
     })
     .partial()
@@ -285,6 +287,7 @@ export const ZGenerateDocumentFromTemplateMutationSchema = z.object({
       dateFormat: z.string(),
       redirectUrl: ZUrlSchema,
       signingOrder: z.nativeEnum(DocumentSigningOrder),
+      allowDictateNextSigner: z.boolean(),
       language: z.enum(SUPPORTED_LANGUAGE_CODES),
       distributionMethod: z.nativeEnum(DocumentDistributionMethod),
       typedSignatureEnabled: z.boolean(),