Implement geo backend, TS client, frontend, and CI tests.

Add a Go HTTP API with Ed25519 auth and invitation onboarding, user-scoped GeoJSON Point management, a Bun-tested @noble/ed25519 TypeScript client, static Vue/Vuetify frontend integration, and a Gitea CI workflow running both Go and Bun test suites.

Made-with: Cursor

libs/geo-api-client/src/keys.ts

@@ -0,0 +1,24 @@
+import { getPublicKeyAsync, signAsync } from "@noble/ed25519";
+import { base64UrlToBytes, bytesToBase64Url, textToBytes } from "./encoding";
+import type { StoredKeys } from "./types";
+
+function randomPrivateKey(): Uint8Array {
+  const out = new Uint8Array(32);
+  crypto.getRandomValues(out);
+  return out;
+}
+
+export async function generateKeyPair(): Promise<StoredKeys> {
+  const privateKey = randomPrivateKey();
+  const publicKey = await getPublicKeyAsync(privateKey);
+  return {
+    publicKey: bytesToBase64Url(publicKey),
+    privateKey: bytesToBase64Url(privateKey),
+  };
+}
+
+export async function signMessage(privateKeyBase64: string, message: string): Promise<string> {
+  const privateKey = base64UrlToBytes(privateKeyBase64);
+  const signature = await signAsync(textToBytes(message), privateKey);
+  return bytesToBase64Url(signature);
+}