Implement RFID tag dump PWA with REST API, auth, and CI

Add Next.js app with SQLite/Drizzle storage for sites and LF/HF tag
dumps, multi-user Auth.js (credentials + optional OIDC), personal API
tokens in Settings, versioned /api/v1 for UI and future CLI use,
MCT/Proxmark/JSON import-export, PWA offline shell, Vitest tests, and
GitHub Actions CI.

src/lib/rfid/uid.ts

@@ -0,0 +1,27 @@
+/**
+ * Normalize RFID UIDs to uppercase hex without separators.
+ * Accepts common forms: "04:A1:B2:C3", "04 A1 B2 C3", "04a1b2c3".
+ */
+export function normalizeUid(input: string): string {
+  const cleaned = input.replace(/[^0-9a-fA-F]/g, "").toUpperCase();
+  if (cleaned.length < 4 || cleaned.length % 2 !== 0) {
+    throw new Error(
+      `Invalid UID "${input}": expected even-length hex of at least 2 bytes`
+    );
+  }
+  return cleaned;
+}
+
+/** Display form with colon separators: 04:A1:B2:C3 */
+export function formatUid(uid: string): string {
+  const normalized = normalizeUid(uid);
+  return normalized.match(/.{1,2}/g)?.join(":") ?? normalized;
+}
+
+export function tryNormalizeUid(input: string): string | null {
+  try {
+    return normalizeUid(input);
+  } catch {
+    return null;
+  }
+}