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/encoding.ts

@@ -0,0 +1,37 @@
+export function bytesToBase64Url(bytes: Uint8Array): string {
+  const bin = Array.from(bytes)
+    .map((b) => String.fromCharCode(b))
+    .join("");
+
+  if (typeof btoa !== "undefined") {
+    return btoa(bin).replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/g, "");
+  }
+
+  // Bun/Node fallback
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  const b64 = (globalThis as any).Buffer.from(bytes).toString("base64");
+  return b64.replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/g, "");
+}
+
+export function base64UrlToBytes(input: string): Uint8Array {
+  const normalized = input.replace(/-/g, "+").replace(/_/g, "/");
+  const padLen = (4 - (normalized.length % 4)) % 4;
+  const b64 = normalized + "=".repeat(padLen);
+
+  if (typeof atob !== "undefined") {
+    const bin = atob(b64);
+    const out = new Uint8Array(bin.length);
+    for (let i = 0; i < bin.length; i++) {
+      out[i] = bin.charCodeAt(i);
+    }
+    return out;
+  }
+
+  // Bun/Node fallback
+  // eslint-disable-next-line @typescript-eslint/no-explicit-any
+  return new Uint8Array((globalThis as any).Buffer.from(b64, "base64"));
+}
+
+export function textToBytes(value: string): Uint8Array {
+  return new TextEncoder().encode(value);
+}