chore(deps): migrate to zod 4

- bump zod 3.25 -> 4.4.3 (AI SDK v6 supports zod 4; dedupes with json-render's
  zod so they share one instance, removing the cross-instance type mismatch)
- v4 breaking changes fixed in app code: required_error/invalid_type_error ->
  error (extensions/news/persona models); ZodError.errors -> .issues (5 services)
- genui: import z from 'zod'. Catalog still cast `as any` because json-render's
  defineCatalog types props as a branded SchemaType, stricter than its public
  z.object() usage (unrelated to the zod instance, so zod 4 doesn't remove it)
- route: drop today/isoDate from the system prompt (main #135 moved time to a
  tool; the ported get_current_time tool now provides it)

next build passes. The vitest suite has pre-existing + new zod-4 type errors to
clean up before merging to main.

Author: saoc90

src/app/(authenticated)/api/chat/route.ts

@@ -36,10 +36,7 @@ import {
   unregisterPublisher,
 } from "@/features/chat-page/chat-services/chat-api/stream-publisher";
 import { enforceSameOriginRequest } from "@/features/chat-page/chat-services/chat-api/same-origin";
-import {
-  buildSystemMessage,
-  isoDate,
-} from "@/features/chat-page/chat-services/chat-api/prompt-builder";
+import { buildSystemMessage } from "@/features/chat-page/chat-services/chat-api/prompt-builder";
 import { CHAT_DEFAULT_SYSTEM_PROMPT } from "@/features/theme/theme-config";
 import {
   FindAllExtensionForCurrentUserAndIds,
@@ -194,7 +191,6 @@ export async function POST(req: Request) {
     buildSystemMessage({
       staticSystemPrompt: CHAT_DEFAULT_SYSTEM_PROMPT,
       personaMessage: ctx.thread.personaMessage ?? "",
-      today: isoDate(),
       documentHint: ctx.documentHint,
     }) +
     // Generative UI: GPT-5.5 reliably declines a UI *tool* under tool_choice

src/components/ai-elements/genui.tsx

@@ -16,7 +16,7 @@ import * as React from 'react';
 import { defineCatalog } from '@json-render/core';
 import { createRenderer } from '@json-render/react';
 import { schema } from '@json-render/react/schema';
-import { z } from 'zod/v4';
+import { z } from 'zod';
 import {
   Card,
   CardContent,
@@ -127,7 +127,11 @@ export const genuiCatalog = defineCatalog(schema, {
       }),
     },
   },
-});
+  // json-render's defineCatalog types `props` as a branded SchemaType<"zod">,
+  // not a raw z.object() — its public docs pass z.object() directly, so the
+  // type is stricter than the supported usage. Components render untyped (see
+  // readProps), so loosen the catalog input type. (Unrelated to the zod version.)
+} as any);
 
 // ---------------------------------------------------------------------------
 // Registry — maps each catalog component to a real Bühler shadcn component.
@@ -158,10 +162,10 @@ const genuiComponents = {
       const p = readProps(a);
       return (
         <Card>
-          {(p.title || p.description) && (
+          {(!!p.title || !!p.description) && (
             <CardHeader>
-              {p.title && <CardTitle className="text-base">{String(p.title)}</CardTitle>}
-              {p.description && <CardDescription>{String(p.description)}</CardDescription>}
+              {!!p.title && <CardTitle className="text-base">{String(p.title)}</CardTitle>}
+              {!!p.description && <CardDescription>{String(p.description)}</CardDescription>}
             </CardHeader>
           )}
           <CardContent className="space-y-3">{a.children}</CardContent>
@@ -217,7 +221,7 @@ const genuiComponents = {
     },
     Text: (a: any) => {
       const p = readProps(a);
-      return <p className={cn('text-sm', p.muted && 'text-muted-foreground')}>{String(p.content ?? '')}</p>;
+      return <p className={cn('text-sm', !!p.muted && 'text-muted-foreground')}>{String(p.content ?? '')}</p>;
     },
     Chart: (a: any) => {
       const p = readProps(a);
@@ -227,7 +231,7 @@ const genuiComponents = {
       const height = 220;
       return (
         <div className="flex flex-col gap-2">
-          {p.title && <span className="text-sm font-medium">{String(p.title)}</span>}
+          {!!p.title && <span className="text-sm font-medium">{String(p.title)}</span>}
           <div ref={ref} className="w-full" style={{ height }}>
             {width > 0 &&
               (isBar ? (

src/features/common/services/news-service/news-model.ts

@@ -8,19 +8,19 @@ export const NewsArticleModelSchema = z.object({
   id: z.string(),
   title: z
     .string({
-      invalid_type_error: "Invalid title",
+      error: "Invalid title",
     })
     .min(1, "Title cannot be empty") // Ensuring title is not empty
     .refine(refineFromEmpty, "Title cannot be empty"),
   description: z
     .string({
-      invalid_type_error: "Invalid description",
+      error: "Invalid description",
     })
     .min(1, "Description cannot be empty") // Ensuring description is not empty
     .refine(refineFromEmpty, "Description cannot be empty"),
   link: z
     .string({
-      invalid_type_error: "Invalid link",
+      error: "Invalid link",
     })
     .url("Link must be a valid URL"), // Ensuring link is a valid URL
   createdAt: z.date(),

src/features/extensions-page/extension-services/extension-service.ts

@@ -464,7 +464,7 @@ const validateSchema = (model: ExtensionModel): ServerActionResponse => {
   if (!validatedFields.success) {
     return {
       status: "ERROR",
-      errors: zodErrorsToServerActionErrors(validatedFields.error.errors),
+      errors: zodErrorsToServerActionErrors(validatedFields.error.issues),
     };
   }
 

src/features/extensions-page/extension-services/models.ts

@@ -34,7 +34,7 @@ export const EndpointTypeSchema = z.enum([
 ]);
 
 export const ExtensionFunctionSchema = z.object({
-  id: z.string({ required_error: "Function ID is required" }),
+  id: z.string({ error: "Function ID is required" }),
   functionName: z
     .string()
     .min(1, {

src/features/persona-page/persona-services/models.ts

@@ -75,19 +75,19 @@ export const PersonaModelSchema = z.object({
   userId: z.string(),
   name: z
     .string({
-      invalid_type_error: "Invalid title",
+      error: "Invalid title",
     })
     .min(1)
     .refine(refineFromEmpty, "Title cannot be empty"),
   description: z
     .string({
-      invalid_type_error: "Invalid description",
+      error: "Invalid description",
     })
     .min(1)
     .refine(refineFromEmpty, "Description cannot be empty"),
   personaMessage: z
     .string({
-      invalid_type_error: "Invalid agent message",
+      error: "Invalid agent message",
     })
     .min(1)
     .refine(refineFromEmpty, "System message cannot be empty"),

src/features/persona-page/persona-services/persona-ci-documents-service.ts

@@ -140,7 +140,7 @@ const ValidatePersonaCIDocumentSchema = (
     if (!validatedFields.success) {
       return {
         status: "ERROR",
-        errors: zodErrorsToServerActionErrors(validatedFields.error.errors),
+        errors: zodErrorsToServerActionErrors(validatedFields.error.issues),
       };
     }
   }

src/features/persona-page/persona-services/persona-documents-service.ts

@@ -683,7 +683,7 @@ const ValidatePersonaDocumentSchema = (
 
     if (!validatedFields.success) {
       errors.push(
-        ...zodErrorsToServerActionErrors(validatedFields.error.errors)
+        ...zodErrorsToServerActionErrors(validatedFields.error.issues)
       );
     } else {
       validModels.push(validatedFields.data);

src/features/persona-page/persona-services/persona-service.ts

@@ -536,7 +536,7 @@ const ValidateSchema = (model: PersonaModel): ServerActionResponse => {
   if (!validatedFields.success) {
     return {
       status: "ERROR",
-      errors: zodErrorsToServerActionErrors(validatedFields.error.errors),
+      errors: zodErrorsToServerActionErrors(validatedFields.error.issues),
     };
   }
 

src/features/prompt-page/prompt-service.ts

@@ -286,7 +286,7 @@ const ValidateSchema = (model: PromptModel): ServerActionResponse => {
   if (!validatedFields.success) {
     return {
       status: "ERROR",
-      errors: zodErrorsToServerActionErrors(validatedFields.error.errors),
+      errors: zodErrorsToServerActionErrors(validatedFields.error.issues),
     };
   }