Update postcss.config.mjs

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://github.com/actions/checkout) | action | major | `v5` -> `v6` |

---

### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6`](https://github.com/actions/checkout/compare/v5...v6)

[Compare Source](https://github.com/actions/checkout/compare/v5...v6)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - "every weekend" (UTC), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi4xMS4wIiwidXBkYXRlZEluVmVyIjoiNDIuMTEuMCIsInRhcmdldEJyYW5jaCI6Im1hc3RlciIsImxhYmVscyI6W119-->

Reviewed-on: #18
Co-authored-by: Renovate Bot <renovatebot@schulze.network>
Co-committed-by: Renovate Bot <renovatebot@schulze.network>

.eslintrc.json

@@ -1,6 +0,0 @@
-{
-  "extends": [
-    "next/core-web-vitals",
-    "next/typescript"
-  ]
-}

.gitea/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6
 
       - name: Install pnpm
         uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
@@ -28,4 +28,4 @@ jobs:
         run: pnpm install
 
       - name: Run check
-        run: pnpm run check
+        run: pnpm run lint

app/sign-up-form.tsx

@@ -41,7 +41,7 @@ export default function SignUp() {
     // Double-check signup isn't blocked before submitting
     const currentStatus = isSignupBlocked();
     if (currentStatus.blocked) {
-      setResponse(currentStatus.message || "Sign-ups are currently closed.");
+      setResponse(currentStatus.message ?? "Sign-ups are currently closed.");
       return;
     }
     setSubmitted(true);
@@ -50,6 +50,7 @@ export default function SignUp() {
   function SignupForm() {
     return (
       <Form {...form}>
+        {/* eslint-disable-next-line @typescript-eslint/no-misused-promises */}
         <form onSubmit={form.handleSubmit(onSubmit)} className="space-y-8">
           <FormField
             control={form.control}
@@ -90,8 +91,10 @@ export default function SignUp() {
                     <FormControl>
                       <Button
                         variant={"outline"}
-                        className={cn("w-[240px] pl-3 text-left font-normal", !field.value && "text-muted-foreground")}
+                        // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+                        className={cn("w-[240px] pl-3 text-left font-normal", field.value && "text-muted-foreground")}
                       >
+                        {/* eslint-disable-next-line @typescript-eslint/no-unnecessary-condition */}
                         {field.value ? format(field.value, "PPP") : <span>Pick a date</span>}
                         <CalendarIcon className="ml-auto h-4 w-4 opacity-50" />
                       </Button>

components/ui/form.tsx

@@ -3,26 +3,19 @@
 import * as React from "react";
 import * as LabelPrimitive from "@radix-ui/react-label";
 import { Slot } from "@radix-ui/react-slot";
-import {
+import { Controller, ControllerProps, FieldPath, FieldValues, FormProvider, useFormContext } from "react-hook-form";
-  Controller,
-  ControllerProps,
-  FieldPath,
-  FieldValues,
-  FormProvider,
-  useFormContext,
-} from "react-hook-form";
 
 import { cn } from "@/lib/utils";
 import { Label } from "@/components/ui/label";
 
 const Form = FormProvider;
 
-type FormFieldContextValue<
+interface FormFieldContextValue<
   TFieldValues extends FieldValues = FieldValues,
   TName extends FieldPath<TFieldValues> = FieldPath<TFieldValues>
-> = {
+> {
   name: TName;
-};
+}
 
 const FormFieldContext = React.createContext<FormFieldContextValue>({} as FormFieldContextValue);
 
@@ -46,7 +39,7 @@ const useFormField = () => {
 
   const fieldState = getFieldState(fieldContext.name, formState);
 
-  if (!fieldContext) {
+  if (!fieldContext.name) {
     throw new Error("useFormField should be used within <FormField>");
   }
 
@@ -62,9 +55,9 @@ const useFormField = () => {
   };
 };
 
-type FormItemContextValue = {
+interface FormItemContextValue {
   id: string;
-};
+}
 
 const FormItemContext = React.createContext<FormItemContextValue>({} as FormItemContextValue);
 
@@ -82,88 +75,57 @@ const FormItem = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivEl
 FormItem.displayName = "FormItem";
 
 const FormLabel = React.forwardRef<
-  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentRef<typeof LabelPrimitive.Root>,
   React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root>
 >(({ className, ...props }, ref) => {
   const { error, formItemId } = useFormField();
 
-  return (
+  return <Label ref={ref} className={cn(error && "text-destructive", className)} htmlFor={formItemId} {...props} />;
-    <Label
-      ref={ref}
-      className={cn(error && "text-destructive", className)}
-      htmlFor={formItemId}
-      {...props}
-    />
-  );
 });
 FormLabel.displayName = "FormLabel";
 
-const FormControl = React.forwardRef<
+const FormControl = React.forwardRef<React.ComponentRef<typeof Slot>, React.ComponentPropsWithoutRef<typeof Slot>>(
-  React.ElementRef<typeof Slot>,
+  ({ ...props }, ref) => {
-  React.ComponentPropsWithoutRef<typeof Slot>
+    const { error, formItemId, formDescriptionId, formMessageId } = useFormField();
->(({ ...props }, ref) => {
-  const { error, formItemId, formDescriptionId, formMessageId } = useFormField();
 
-  return (
+    return (
-    <Slot
+      <Slot
-      ref={ref}
+        ref={ref}
-      id={formItemId}
+        id={formItemId}
-      aria-describedby={!error ? `${formDescriptionId}` : `${formDescriptionId} ${formMessageId}`}
+        aria-describedby={!error ? formDescriptionId : `${formDescriptionId} ${formMessageId}`}
-      aria-invalid={!!error}
+        aria-invalid={!!error}
-      {...props}
+        {...props}
-    />
+      />
-  );
+    );
-});
+  }
+);
 FormControl.displayName = "FormControl";
 
-const FormDescription = React.forwardRef<
+const FormDescription = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
-  HTMLParagraphElement,
+  ({ className, ...props }, ref) => {
-  React.HTMLAttributes<HTMLParagraphElement>
+    const { formDescriptionId } = useFormField();
->(({ className, ...props }, ref) => {
-  const { formDescriptionId } = useFormField();
 
-  return (
+    return <p ref={ref} id={formDescriptionId} className={cn("text-sm text-muted-foreground", className)} {...props} />;
-    <p
+  }
-      ref={ref}
+);
-      id={formDescriptionId}
-      className={cn("text-sm text-muted-foreground", className)}
-      {...props}
-    />
-  );
-});
 FormDescription.displayName = "FormDescription";
 
-const FormMessage = React.forwardRef<
+const FormMessage = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLParagraphElement>>(
-  HTMLParagraphElement,
+  ({ className, children, ...props }, ref) => {
-  React.HTMLAttributes<HTMLParagraphElement>
+    const { error, formMessageId } = useFormField();
->(({ className, children, ...props }, ref) => {
+    const body = error ? String(error.message) : children;
-  const { error, formMessageId } = useFormField();
-  const body = error ? String(error?.message) : children;
 
-  if (!body) {
+    if (!body) {
-    return null;
+      return null;
+    }
+
+    return (
+      <p ref={ref} id={formMessageId} className={cn("text-sm font-medium text-destructive", className)} {...props}>
+        {body}
+      </p>
+    );
   }
-
+);
-  return (
-    <p
-      ref={ref}
-      id={formMessageId}
-      className={cn("text-sm font-medium text-destructive", className)}
-      {...props}
-    >
-      {body}
-    </p>
-  );
-});
 FormMessage.displayName = "FormMessage";
 
-export {
+export { useFormField, Form, FormItem, FormLabel, FormControl, FormDescription, FormMessage, FormField };
-  useFormField,
-  Form,
-  FormItem,
-  FormLabel,
-  FormControl,
-  FormDescription,
-  FormMessage,
-  FormField,
-};

components/ui/label.tsx

@@ -11,7 +11,7 @@ const labelVariants = cva(
 );
 
 const Label = React.forwardRef<
-  React.ElementRef<typeof LabelPrimitive.Root>,
+  React.ComponentRef<typeof LabelPrimitive.Root>,
   React.ComponentPropsWithoutRef<typeof LabelPrimitive.Root> & VariantProps<typeof labelVariants>
 >(({ className, ...props }, ref) => (
   <LabelPrimitive.Root ref={ref} className={cn(labelVariants(), className)} {...props} />

components/ui/popover.tsx

@@ -10,7 +10,7 @@ const Popover = PopoverPrimitive.Root;
 const PopoverTrigger = PopoverPrimitive.Trigger;
 
 const PopoverContent = React.forwardRef<
-  React.ElementRef<typeof PopoverPrimitive.Content>,
+  React.ComponentRef<typeof PopoverPrimitive.Content>,
   React.ComponentPropsWithoutRef<typeof PopoverPrimitive.Content>
 >(({ className, align = "center", sideOffset = 4, ...props }, ref) => (
   <PopoverPrimitive.Portal>

components/ui/select.tsx

@@ -13,7 +13,7 @@ const SelectGroup = SelectPrimitive.Group;
 const SelectValue = SelectPrimitive.Value;
 
 const SelectTrigger = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.Trigger>,
+  React.ComponentRef<typeof SelectPrimitive.Trigger>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.Trigger>
 >(({ className, children, ...props }, ref) => (
   <SelectPrimitive.Trigger
@@ -33,7 +33,7 @@ const SelectTrigger = React.forwardRef<
 SelectTrigger.displayName = SelectPrimitive.Trigger.displayName;
 
 const SelectScrollUpButton = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.ScrollUpButton>,
+  React.ComponentRef<typeof SelectPrimitive.ScrollUpButton>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollUpButton>
 >(({ className, ...props }, ref) => (
   <SelectPrimitive.ScrollUpButton
@@ -47,7 +47,7 @@ const SelectScrollUpButton = React.forwardRef<
 SelectScrollUpButton.displayName = SelectPrimitive.ScrollUpButton.displayName;
 
 const SelectScrollDownButton = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.ScrollDownButton>,
+  React.ComponentRef<typeof SelectPrimitive.ScrollDownButton>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.ScrollDownButton>
 >(({ className, ...props }, ref) => (
   <SelectPrimitive.ScrollDownButton
@@ -61,7 +61,7 @@ const SelectScrollDownButton = React.forwardRef<
 SelectScrollDownButton.displayName = SelectPrimitive.ScrollDownButton.displayName;
 
 const SelectContent = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.Content>,
+  React.ComponentRef<typeof SelectPrimitive.Content>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.Content>
 >(({ className, children, position = "popper", ...props }, ref) => (
   <SelectPrimitive.Portal>
@@ -93,7 +93,7 @@ const SelectContent = React.forwardRef<
 SelectContent.displayName = SelectPrimitive.Content.displayName;
 
 const SelectLabel = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.Label>,
+  React.ComponentRef<typeof SelectPrimitive.Label>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.Label>
 >(({ className, ...props }, ref) => (
   <SelectPrimitive.Label
@@ -105,7 +105,7 @@ const SelectLabel = React.forwardRef<
 SelectLabel.displayName = SelectPrimitive.Label.displayName;
 
 const SelectItem = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.Item>,
+  React.ComponentRef<typeof SelectPrimitive.Item>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.Item>
 >(({ className, children, ...props }, ref) => (
   <SelectPrimitive.Item
@@ -128,7 +128,7 @@ const SelectItem = React.forwardRef<
 SelectItem.displayName = SelectPrimitive.Item.displayName;
 
 const SelectSeparator = React.forwardRef<
-  React.ElementRef<typeof SelectPrimitive.Separator>,
+  React.ComponentRef<typeof SelectPrimitive.Separator>,
   React.ComponentPropsWithoutRef<typeof SelectPrimitive.Separator>
 >(({ className, ...props }, ref) => (
   <SelectPrimitive.Separator

eslint.config.mjs

@@ -0,0 +1,37 @@
+// @ts-check
+import { defineConfig, globalIgnores } from "eslint/config";
+import nextVitals from "eslint-config-next/core-web-vitals";
+import nextTs from "eslint-config-next/typescript";
+import tseslint from "typescript-eslint";
+
+const eslintConfig = defineConfig([
+  // Next.js core-web-vitals and TypeScript configs
+  ...nextVitals,
+  ...nextTs,
+  // Add strict TypeScript rules on top
+  ...tseslint.configs.strictTypeChecked,
+  ...tseslint.configs.stylisticTypeChecked,
+  // Configure TypeScript parser options
+  {
+    files: ["**/*.{ts,tsx}"],
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  // Override default ignores of eslint-config-next
+  globalIgnores([
+    // Default ignores of eslint-config-next:
+    ".next/**",
+    "out/**",
+    "build/**",
+    "next-env.d.ts",
+    // Additional ignores:
+    "*.mjs",
+    "tailwind.config.ts",
+  ]),
+]);
+
+export default eslintConfig;

lib/listmonk.ts

@@ -1,12 +1,12 @@
 import "server-only";
 
-export type listmonkData = {
+export interface listmonkData {
   email: string;
   name: string;
   status: "enabled" | "blocklisted";
   lists: number[];
   attribs: Record<string, string>;
-};
+}
 
 async function listmonk(data: listmonkData): Promise<string> {
   const listmonkUrl = process.env.LISTMONK_URL ?? "http://localhost:9000/api/";

lib/signup-time-check.test.ts

@@ -5,7 +5,7 @@ function testScenario(description: string, date: Date, expected: boolean) {
   const result = isSignupBlocked(date);
   const status = result.blocked === expected ? "✅ PASS" : "❌ FAIL";
   console.log(`${status} ${description}`);
-  console.log(`  Expected blocked: ${expected}, Got: ${result.blocked}`);
+  console.log(`  Expected blocked: ${String(expected)}, Got: ${String(result.blocked)}`);
   if (result.message) {
     console.log(`  Message: ${result.message}`);
   }

lib/signup-time-check.ts

@@ -1,7 +1,7 @@
 import eventConfig from "@/event-dates.json";
 
 export function isSignupBlocked(currentTime?: Date): { blocked: boolean; message?: string } {
-  const now = currentTime || new Date();
+  const now = currentTime ?? new Date();
   const cutoffTime = eventConfig.cutoffTime || "15:00";
   const blockDurationHours = eventConfig.blockDurationHours || 6;
 

package.json

@@ -6,7 +6,7 @@
     "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
-    "check": "next lint && npx tsc --noEmit"
+    "lint": "next typegen && eslint . && npx tsc --noEmit"
   },
   "dependencies": {
     "@hookform/resolvers": "^5.1.1",
@@ -18,31 +18,38 @@
     "clsx": "^2.1.1",
     "cssnano": "^7.1.0",
     "date-fns": "^4.1.0",
-    "lucide-react": "^0.552.0",
+    "lucide-react": "^0.554.0",
-    "next": "^15.4.1",
+    "next": "16.0.3",
     "next-plausible": "^3.12.4",
     "postcss-flexbugs-fixes": "^5.0.2",
     "postcss-preset-env": "^10.2.4",
-    "react": "^19.1.0",
+    "react": "19.2.0",
     "react-day-picker": "^9.8.0",
-    "react-dom": "^19.1.0",
+    "react-dom": "19.2.0",
     "react-hook-form": "^7.60.0",
     "tailwind-merge": "^3.3.1",
     "tailwindcss-animate": "^1.0.7",
     "zod": "^4.0.5"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "4.1.16",
+    "@tailwindcss/postcss": "4.1.17",
-    "@types/node": "24.9.2",
+    "@types/node": "24.10.1",
-    "@types/react": "19.2.2",
+    "@types/react": "19.2.6",
-    "@types/react-dom": "19.2.2",
+    "@types/react-dom": "19.2.3",
     "eslint": "9.39.1",
-    "eslint-config-next": "15.5.6",
+    "eslint-config-next": "16.0.3",
     "eslint-config-prettier": "10.1.8",
     "postcss": "8.5.6",
-    "tailwindcss": "4.1.16",
+    "tailwindcss": "4.1.17",
-    "turbo": "2.6.0",
+    "turbo": "2.6.1",
-    "typescript": "5.9.3"
+    "typescript": "5.9.3",
+    "typescript-eslint": "^8.47.0"
   },
-  "packageManager": "pnpm@10.20.0"
+  "packageManager": "pnpm@10.23.0",
+  "pnpm": {
+    "overrides": {
+      "@types/react": "19.2.6",
+      "@types/react-dom": "19.2.3"
+    }
+  }
 }

postcss.config.mjs

@@ -2,27 +2,6 @@
 const config = {
   plugins: {
     '@tailwindcss/postcss': {},
-
-    "postcss-flexbugs-fixes": {
-      "postcss-preset-env": {
-        autoprefixer: {
-          flexbox: "no-2009",
-        },
-        stage: 3,
-        features: {
-          "custom-properties": false,
-        },
-      },
-
-      "@fullhuman/postcss-purgecss": {
-        content: [
-          "./pages/**/*.{js,jsx,ts,tsx}",
-          "./components/**/*.{js,jsx,ts,tsx}",
-        ],
-        defaultExtractor: (content) => content.match(/[\w-/:]+(?<!:)/g) || [],
-        safelist: ["html", "body"],
-      },
-    },
     cssnano: {},
   },
 };

tsconfig.json

@@ -10,7 +10,7 @@
     "moduleResolution": "bundler",
     "resolveJsonModule": true,
     "isolatedModules": true,
-    "jsx": "preserve",
+    "jsx": "react-jsx",
     "incremental": true,
     "plugins": [
       {
@@ -22,6 +22,13 @@
     },
     "target": "ES2023"
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts", "event-dates.json"],
+  "include": [
+    "next-env.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts",
+    "event-dates.json",
+    ".next/dev/types/**/*.ts"
+  ],
   "exclude": ["node_modules"]
 }