fix(deps): update nextjs monorepo to v16

This PR contains the following updates:

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

---

### Release Notes

<details>
<summary>actions/setup-node (actions/setup-node)</summary>

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

[Compare Source](https://github.com/actions/setup-node/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:eyJjcmVhdGVkSW5WZXIiOiI0MS4xMjIuMyIsInVwZGF0ZWRJblZlciI6IjQxLjEyMi4zIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbXX0=-->

Reviewed-on: #15
Co-authored-by: Renovate Bot <renovatebot@schulze.network>
Co-committed-by: Renovate Bot <renovatebot@schulze.network>

.gitea/workflows/lint.yml

@@ -13,15 +13,15 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5
 
       - name: Install pnpm
-        uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # v4
+        uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4
 
       - name: Setup Node.js
-        uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6
         with:
-          node-version: 22
+          node-version: 24
           cache: "pnpm"
 
       - name: Install dependencies

EVENT_DATES_GUIDE.md

@@ -0,0 +1,44 @@
+# Event Dates Management Guide
+
+## How to Block Sign-ups on Event Days
+
+The sign-up form automatically closes at 3pm on specified event dates to prevent last-minute registrations.
+
+### Managing Event Dates
+
+1. Open the `event-dates.json` file in the project root
+2. Add or remove dates in the `eventDates` array
+3. Use the format `YYYY-MM-DD` (e.g., "2024-12-25" for December 25, 2024)
+
+### Example Configuration
+
+```json
+{
+  "eventDates": ["2025-09-05", "1999-01-01"],
+  "cutoffTime": "15:00",
+  "message": "Sign-ups are closed for today's event. Please come back tomorrow."
+}
+```
+
+### Important Notes
+
+- The cutoff time is set to 3pm (15:00) by default
+- Sign-ups will automatically reopen at midnight after an event day
+- Users will see a friendly message when sign-ups are closed
+- The time zone follows the server's local time
+
+### Adding New Event Dates
+
+Simply add a new date to the array:
+
+```json
+"eventDates": [
+  "2024-12-25",
+  "2024-12-31",
+  "2025-01-15",
+  "2025-02-14",
+  "2025-03-20"  // <- New date added
+]
+```
+
+Remember to save the file after making changes!

app/sign-up-form.tsx

@@ -14,6 +14,7 @@ import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover
 import { cn } from "@/lib/utils";
 import { signupFormSubmit } from "@/lib/actions";
 import { useState } from "react";
+import { isSignupBlocked } from "@/lib/signup-time-check";
 
 export const signupFormSchema = z.object({
   name: z.string().min(2, { error: "Name is required" }).max(50, { error: "Name is too long" }),
@@ -26,6 +27,8 @@ export const oldestDate = new Date(new Date().setFullYear(new Date().getFullYear
 export default function SignUp() {
   const [submitted, setSubmitted] = useState(false);
   const [response, setResponse] = useState<string | null>(null);
+  const signupStatus = isSignupBlocked();
+
   const form = useForm<z.infer<typeof signupFormSchema>>({
     resolver: zodResolver(signupFormSchema),
     defaultValues: {
@@ -35,6 +38,12 @@ export default function SignUp() {
     },
   });
   async function onSubmit(values: z.infer<typeof signupFormSchema>) {
+    // Double-check signup isn't blocked before submitting
+    const currentStatus = isSignupBlocked();
+    if (currentStatus.blocked) {
+      setResponse(currentStatus.message || "Sign-ups are currently closed.");
+      return;
+    }
     setSubmitted(true);
     setResponse(await signupFormSubmit(values));
   }
@@ -109,12 +118,22 @@ export default function SignUp() {
               </FormItem>
             )}
           />
-          <Button type="submit" disabled={submitted}>
+          <Button type="submit" disabled={submitted || signupStatus.blocked}>
             Submit
           </Button>
         </form>
       </Form>
     );
   }
+  // If signup is blocked, show the message
+  if (signupStatus.blocked && !response) {
+    return (
+      <div className="rounded-lg border bg-orange-50 p-6 text-center">
+        <p className="text-lg font-semibold text-orange-900 mb-2">Sign-ups Temporarily Closed</p>
+        <p className="text-orange-800">{signupStatus.message}</p>
+      </div>
+    );
+  }
+
   return response ?? SignupForm();
 }

components/ui/input.tsx

@@ -2,23 +2,17 @@ import * as React from "react";
 
 import { cn } from "@/lib/utils";
 
-export interface InputProps extends React.InputHTMLAttributes<HTMLInputElement> {}
-
-const Input = React.forwardRef<HTMLInputElement, InputProps>(
-  ({ className, type, ...props }, ref) => {
-    return (
-      <input
-        type={type}
-        className={cn(
-          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
-          className
-        )}
-        ref={ref}
-        {...props}
-      />
-    );
-  }
-);
-Input.displayName = "Input";
-
+function Input({ className, type, ...props }: React.ComponentProps<"input">) {
+  return (
+    <input
+      type={type}
+      data-slot="input"
+      className={cn(
+        "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-sm ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-hidden focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50",
+        className
+      )}
+      {...props}
+    />
+  );
+}
 export { Input };

event-dates.json

@@ -0,0 +1,8 @@
+{
+  "eventDates": ["2025-09-05", "2025-10-25", "2025-12-06", "1999-01-01"],
+  "cutoffTime": "23:00",
+  "blockDurationHours": 6,
+  "message": "Sign-ups are closed for today's event. Please come back tomorrow.",
+
+  "internalComment": "Add event dates in YYYY-MM-DD format. Signups will be disabled after cutoffTime (23:00) for blockDurationHours (6 hours)."
+}

lib/listmonk.ts

@@ -29,7 +29,7 @@ async function listmonk(data: listmonkData): Promise<string> {
       return "An error occurred or this email is already subscribed.";
     }
     return "Thanks for signing up! Please check your email for a confirmation.";
-  } catch (error) {
+  } catch {
     return "An error occurred while trying to sign up. Please try again.";
   }
 }

lib/signup-time-check.test.ts

@@ -0,0 +1,40 @@
+import { isSignupBlocked } from "./signup-time-check";
+
+// Test helper to check different scenarios
+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}`);
+  if (result.message) {
+    console.log(`  Message: ${result.message}`);
+  }
+  console.log();
+}
+
+// Run tests
+console.log("Testing signup blocking logic...\n");
+
+// October 25, 2025 at 22:00 (before cutoff)
+testScenario("Oct 25 at 22:00 - Before cutoff", new Date("2025-10-25T22:00:00"), false);
+
+// October 25, 2025 at 23:00 (exactly at cutoff)
+testScenario("Oct 25 at 23:00 - At cutoff time", new Date("2025-10-25T23:00:00"), true);
+
+// October 25, 2025 at 23:30 (during block period)
+testScenario("Oct 25 at 23:30 - During block period", new Date("2025-10-25T23:30:00"), true);
+
+// October 26, 2025 at 02:00 (3 hours into block)
+testScenario("Oct 26 at 02:00 - 3 hours into block", new Date("2025-10-26T02:00:00"), true);
+
+// October 26, 2025 at 04:59 (just before block ends)
+testScenario("Oct 26 at 04:59:59 - Just before block ends", new Date("2025-10-26T04:59:59"), true);
+
+// October 26, 2025 at 05:00 (block period over)
+testScenario("Oct 26 at 05:00 - Block period ended", new Date("2025-10-26T05:00:00"), false);
+
+// October 26, 2025 at 12:00 (well after block)
+testScenario("Oct 26 at 12:00 - Well after block", new Date("2025-10-26T12:00:00"), false);
+
+// Random non-event date
+testScenario("Oct 20 at 23:00 - Non-event date", new Date("2025-10-20T23:00:00"), false);

lib/signup-time-check.ts

@@ -0,0 +1,29 @@
+import eventConfig from "@/event-dates.json";
+
+export function isSignupBlocked(currentTime?: Date): { blocked: boolean; message?: string } {
+  const now = currentTime || new Date();
+  const cutoffTime = eventConfig.cutoffTime || "15:00";
+  const blockDurationHours = eventConfig.blockDurationHours || 6;
+
+  // Check each event date to see if we're in a block period
+  for (const eventDate of eventConfig.eventDates) {
+    // Parse the event date and cutoff time in local timezone
+    const [year, month, day] = eventDate.split("-").map(Number);
+    const [hours, minutes] = cutoffTime.split(":").map(Number);
+    const blockStart = new Date(year, month - 1, day, hours, minutes, 0, 0);
+
+    // Calculate when the block period ends (using wall-clock hours to handle DST correctly)
+    const blockEnd = new Date(blockStart);
+    blockEnd.setHours(blockStart.getHours() + blockDurationHours);
+
+    // Check if current time is within the block period
+    if (now >= blockStart && now < blockEnd) {
+      return {
+        blocked: true,
+        message: eventConfig.message,
+      };
+    }
+  }
+
+  return { blocked: false };
+}

package.json

@@ -9,40 +9,40 @@
     "check": "next lint && npx tsc --noEmit"
   },
   "dependencies": {
-    "@hookform/resolvers": "^5.0.0",
-    "@radix-ui/react-label": "^2.1.2",
-    "@radix-ui/react-popover": "^1.1.6",
-    "@radix-ui/react-select": "^2.1.6",
-    "@radix-ui/react-slot": "^1.1.2",
-    "class-variance-authority": "^0.7.0",
+    "@hookform/resolvers": "^5.1.1",
+    "@radix-ui/react-label": "^2.1.7",
+    "@radix-ui/react-popover": "^1.1.14",
+    "@radix-ui/react-select": "^2.2.5",
+    "@radix-ui/react-slot": "^1.2.3",
+    "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
-    "cssnano": "^7.0.1",
-    "date-fns": "^4.0.0",
-    "lucide-react": "^0.525.0",
-    "next": "^15.2.1",
-    "next-plausible": "^3.12.0",
+    "cssnano": "^7.1.0",
+    "date-fns": "^4.1.0",
+    "lucide-react": "^0.552.0",
+    "next": "^16.0.0",
+    "next-plausible": "^3.12.4",
     "postcss-flexbugs-fixes": "^5.0.2",
-    "postcss-preset-env": "^10.0.0",
-    "react": "^19.0.0",
-    "react-day-picker": "^9.5.1",
-    "react-dom": "^19.0.0",
-    "react-hook-form": "^7.54.2",
-    "tailwind-merge": "^3.0.0",
+    "postcss-preset-env": "^10.2.4",
+    "react": "^19.1.0",
+    "react-day-picker": "^9.8.0",
+    "react-dom": "^19.1.0",
+    "react-hook-form": "^7.60.0",
+    "tailwind-merge": "^3.3.1",
     "tailwindcss-animate": "^1.0.7",
-    "zod": "^4.0.0"
+    "zod": "^4.0.5"
   },
   "devDependencies": {
-    "@tailwindcss/postcss": "4.1.11",
-    "@types/node": "22.16.3",
-    "@types/react": "19.1.8",
-    "@types/react-dom": "19.1.6",
-    "eslint": "9.31.0",
-    "eslint-config-next": "15.3.5",
-    "eslint-config-prettier": "10.1.5",
+    "@tailwindcss/postcss": "4.1.16",
+    "@types/node": "24.9.2",
+    "@types/react": "19.2.2",
+    "@types/react-dom": "19.2.2",
+    "eslint": "9.39.0",
+    "eslint-config-next": "16.0.1",
+    "eslint-config-prettier": "10.1.8",
     "postcss": "8.5.6",
-    "tailwindcss": "4.1.11",
-    "turbo": "2.5.4",
-    "typescript": "5.8.3"
+    "tailwindcss": "4.1.16",
+    "turbo": "2.6.0",
+    "typescript": "5.9.3"
   },
-  "packageManager": "pnpm@10.13.1"
+  "packageManager": "pnpm@10.20.0"
 }

tsconfig.json

@@ -22,6 +22,6 @@
     },
     "target": "ES2023"
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts", "event-dates.json"],
   "exclude": ["node_modules"]
 }