feat(web): add custom 404 pages for global and authenticated routes #472

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jason.woltje merged 1 commits from feat/404-page into main 2026-02-23 03:43:56 +00:00
2 changed files with 335 additions and 0 deletions
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import type { ReactElement } from "react";
import Link from "next/link";
export default function AuthenticatedNotFound(): ReactElement {
return (
<div
style={{
display: "flex",
alignItems: "center",
justifyContent: "center",
minHeight: "60vh",
}}
>
<div
style={{
display: "flex",
flexDirection: "column",
alignItems: "center",
gap: "24px",
padding: "48px 40px",
background: "var(--surface)",
border: "1px solid var(--border)",
borderRadius: "var(--r-xl)",
boxShadow: "var(--shadow-md)",
textAlign: "center",
maxWidth: "420px",
width: "100%",
}}
>
{/* Compass icon in blue-tinted icon well */}
<div
style={{
display: "flex",
alignItems: "center",
justifyContent: "center",
width: 56,
height: 56,
borderRadius: "var(--r-lg)",
background: "rgba(47, 128, 255, 0.1)",
color: "var(--ms-blue-400)",
}}
>
<svg
width="28"
height="28"
viewBox="0 0 24 24"
fill="none"
stroke="currentColor"
strokeWidth="1.5"
strokeLinecap="round"
strokeLinejoin="round"
aria-hidden="true"
>
<circle cx="12" cy="12" r="10" />
<polygon
points="16.24 7.76 14.12 14.12 7.76 16.24 9.88 9.88 16.24 7.76"
fill="currentColor"
stroke="none"
opacity="0.3"
/>
<polygon points="16.24 7.76 14.12 14.12 7.76 16.24 9.88 9.88 16.24 7.76" />
</svg>
</div>
{/* 404 badge pill */}
<span
style={{
display: "inline-flex",
alignItems: "center",
padding: "4px 12px",
borderRadius: "9999px",
fontSize: "0.75rem",
fontWeight: 600,
fontFamily: "var(--mono)",
background: "rgba(47, 128, 255, 0.15)",
color: "var(--ms-blue-400)",
}}
>
404
</span>
{/* Heading + description */}
<div style={{ display: "flex", flexDirection: "column", gap: "8px" }}>
<h2
style={{
fontSize: "1.25rem",
fontWeight: 600,
color: "var(--text)",
margin: 0,
letterSpacing: "-0.01em",
}}
>
Page not found
</h2>
<p
style={{
fontSize: "0.875rem",
color: "var(--muted)",
margin: 0,
lineHeight: 1.6,
}}
>
This page doesn&apos;t exist or you may not have permission to view it.
</p>
</div>
{/* Action buttons */}
<div
style={{
display: "flex",
alignItems: "center",
gap: "12px",
marginTop: "8px",
}}
>
{/* Primary: Dashboard */}
<Link
href="/"
style={{
display: "inline-flex",
alignItems: "center",
justifyContent: "center",
padding: "9px 20px",
background: "var(--ms-blue-500)",
color: "#ffffff",
borderRadius: "var(--r)",
fontSize: "0.875rem",
fontWeight: 500,
textDecoration: "none",
transition: "opacity 0.15s ease",
}}
>
Dashboard
</Link>
{/* Ghost: Settings */}
<Link
href="/settings"
style={{
display: "inline-flex",
alignItems: "center",
justifyContent: "center",
padding: "9px 20px",
background: "transparent",
color: "var(--text-2)",
border: "1px solid var(--border)",
borderRadius: "var(--r)",
fontSize: "0.875rem",
fontWeight: 500,
textDecoration: "none",
transition: "all 0.15s ease",
}}
>
Settings
</Link>
</div>
</div>
</div>
);
}

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import type { Metadata } from "next";
import type { ReactElement } from "react";
import Link from "next/link";
export const metadata: Metadata = {
title: "404 — Page Not Found | Mosaic Stack",
};
export default function NotFound(): ReactElement {
return (
<div
style={{
display: "flex",
flexDirection: "column",
alignItems: "center",
justifyContent: "center",
minHeight: "100vh",
background: "var(--bg)",
padding: "24px",
textAlign: "center",
gap: "32px",
}}
>
{/* Mosaic logo mark — inline spans replicating the 5-element logo */}
<div
style={{
width: 48,
height: 48,
position: "relative",
flexShrink: 0,
}}
role="img"
aria-label="Mosaic logo"
>
{/* Top-left: blue */}
<span
style={{
position: "absolute",
top: 0,
left: 0,
width: 19,
height: 19,
borderRadius: 4,
background: "var(--ms-blue-500)",
}}
/>
{/* Top-right: purple */}
<span
style={{
position: "absolute",
top: 0,
right: 0,
width: 19,
height: 19,
borderRadius: 4,
background: "var(--ms-purple-500)",
}}
/>
{/* Bottom-right: teal */}
<span
style={{
position: "absolute",
bottom: 0,
right: 0,
width: 19,
height: 19,
borderRadius: 4,
background: "var(--ms-teal-500)",
}}
/>
{/* Bottom-left: amber */}
<span
style={{
position: "absolute",
bottom: 0,
left: 0,
width: 19,
height: 19,
borderRadius: 4,
background: "var(--ms-amber-500)",
}}
/>
{/* Center: pink circle */}
<span
style={{
position: "absolute",
top: "50%",
left: "50%",
transform: "translate(-50%, -50%)",
width: 15,
height: 15,
borderRadius: "50%",
background: "var(--ms-pink-500)",
}}
/>
</div>
{/* 404 gradient text */}
<h1
style={{
fontFamily: "var(--mono)",
fontSize: "6rem",
fontWeight: 700,
lineHeight: 1,
margin: 0,
background: "linear-gradient(135deg, var(--ms-blue-400), var(--ms-purple-500))",
WebkitBackgroundClip: "text",
WebkitTextFillColor: "transparent",
backgroundClip: "text",
}}
>
404
</h1>
{/* Heading + description */}
<div style={{ display: "flex", flexDirection: "column", gap: "12px" }}>
<h2
style={{
fontSize: "1.5rem",
fontWeight: 600,
color: "var(--text)",
margin: 0,
letterSpacing: "-0.025em",
}}
>
Page not found
</h2>
<p
style={{
fontSize: "0.9375rem",
color: "var(--muted)",
margin: 0,
maxWidth: "400px",
lineHeight: 1.6,
}}
>
The page you&apos;re looking for doesn&apos;t exist or has been moved.
</p>
</div>
{/* Dashboard link styled as button */}
<Link
href="/"
style={{
display: "inline-flex",
alignItems: "center",
justifyContent: "center",
padding: "10px 24px",
background: "var(--ms-blue-500)",
color: "#ffffff",
borderRadius: "var(--r)",
fontSize: "0.875rem",
fontWeight: 500,
textDecoration: "none",
transition: "opacity 0.15s ease",
}}
>
Go to Dashboard
</Link>
{/* Subtle status footer */}
<p
style={{
fontFamily: "var(--mono)",
fontSize: "0.75rem",
color: "var(--muted)",
margin: 0,
opacity: 0.6,
}}
>
HTTP 404 Not Found
</p>
</div>
);
}