fix(build): self-host the app fonts so the build doesn't need Google

next/font/google downloads every font from fonts.googleapis.com during
`next build`, and the Coolify build kept failing on it (Nunito/Outfit on
2026-10-17, Lato and JetBrains Mono on 2026-10-20).

The ten families (Geist, Geist Mono, Inter, Space Grotesk, DM Sans,
Playfair Display, Lato, Nunito, Outfit, JetBrains Mono) are now Latin
.woff2 files in src/app/fonts (344 KB, downloaded from Google Fonts),
loaded with next/font/local under the same CSS variable names and
weights. Verified: `npm run build` succeeds with no network access, and
the login page renders in the local Inter with no font errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/layout.tsx

@@ -1,16 +1,5 @@
 import type { Metadata, Viewport } from "next";
-import {
-  Geist,
-  Geist_Mono,
-  Inter,
-  Space_Grotesk,
-  DM_Sans,
-  Playfair_Display,
-  Lato,
-  Nunito,
-  Outfit,
-  JetBrains_Mono,
-} from "next/font/google";
+import localFont from "next/font/local";
 import "leaflet/dist/leaflet.css";
 import "./globals.css";
 import { ThemeProvider } from "@/components/theme-provider";
@@ -20,68 +9,75 @@ import { TooltipProvider } from "@/components/ui/tooltip";
 import { ServiceWorkerRegistration } from "@/components/service-worker-registration";
 import { ThemeBootstrapScript } from "@/components/theme-bootstrap";
 
-// Geist (default app fonts)
-const geistSans = Geist({
+// Fonts are self-hosted from ./fonts (Latin subsets of the Google Fonts
+// files, downloaded 2026-10-20). With next/font/google every build fetched
+// them from fonts.googleapis.com, and the Coolify build kept failing on
+// that download (Nunito/Outfit 17 Oct, Lato and JetBrains Mono 20 Oct).
+// Same CSS variable names and weights as before.
+
+// Geist (default app fonts) — variable fonts.
+const geistSans = localFont({
+  src: "./fonts/geist-var.woff2",
   variable: "--font-geist-sans",
-  subsets: ["latin"],
+  weight: "100 900",
 });
-const geistMono = Geist_Mono({
+const geistMono = localFont({
+  src: "./fonts/geist-mono-var.woff2",
   variable: "--font-geist-mono",
-  subsets: ["latin"],
+  weight: "100 900",
 });
 
-// Theme-bound fonts (registered as CSS vars for the theme picker to swap).
-// Each font is restricted to the two weights actually used in the app
-// (400 regular + 700 bold). Without these, next/font/google preloads
-// every available weight and the browser logs warnings about unused
-// preload tags (and the page wastes bandwidth fetching woff2 files
-// that will never render).
-const inter = Inter({
+// Theme-bound fonts (registered as CSS vars for the theme picker to swap),
+// 400 regular + 700 bold — the two weights the app uses. Most are variable
+// files covering 400–700; Lato ships one file per weight.
+const inter = localFont({
+  src: "./fonts/inter-var.woff2",
   variable: "--font-inter",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const spaceGrotesk = Space_Grotesk({
+const spaceGrotesk = localFont({
+  src: "./fonts/space-grotesk-var.woff2",
   variable: "--font-space-grotesk",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const dmSans = DM_Sans({
+const dmSans = localFont({
+  src: "./fonts/dm-sans-var.woff2",
   variable: "--font-dm-sans",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const playfair = Playfair_Display({
+const playfair = localFont({
+  src: "./fonts/playfair-display-var.woff2",
   variable: "--font-playfair",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const lato = Lato({
+const lato = localFont({
+  src: [
+    { path: "./fonts/lato-400.woff2", weight: "400", style: "normal" },
+    { path: "./fonts/lato-700.woff2", weight: "700", style: "normal" },
+  ],
   variable: "--font-lato",
-  subsets: ["latin"],
-  weight: ["400", "700"],
   display: "swap",
 });
-const nunito = Nunito({
+const nunito = localFont({
+  src: "./fonts/nunito-var.woff2",
   variable: "--font-nunito",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const outfit = Outfit({
+const outfit = localFont({
+  src: "./fonts/outfit-var.woff2",
   variable: "--font-outfit",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });
-const jetbrainsMono = JetBrains_Mono({
+const jetbrainsMono = localFont({
+  src: "./fonts/jetbrains-mono-var.woff2",
   variable: "--font-jetbrains-mono",
-  subsets: ["latin"],
-  weight: ["400", "700"],
+  weight: "400 700",
   display: "swap",
 });