feat: uv config other feats

- add uv configuration for the backend
- update frontend to make auth work
- add new auth endpoints
- add bookmars feat
- add reader feat

frontend/src/api/errors.ts

@@ -0,0 +1,40 @@
+import axios from "axios";
+
+function messagesFromValue(value: unknown): string[] {
+  if (value == null) return [];
+  if (typeof value === "string") return [value];
+  if (Array.isArray(value)) return value.flatMap(messagesFromValue);
+  if (typeof value === "object") {
+    const record = value as Record<string, unknown>;
+    if ("detail" in record) {
+      const fromDetail = messagesFromValue(record.detail);
+      if (fromDetail.length > 0) return fromDetail;
+    }
+    const messages: string[] = [];
+    for (const [key, nested] of Object.entries(record)) {
+      if (key === "detail") continue;
+      for (const part of messagesFromValue(nested)) {
+        messages.push(key === "non_field_errors" ? part : `${key}: ${part}`);
+      }
+    }
+    return messages;
+  }
+  return [];
+}
+
+/** Extract human-readable message(s) from a Django REST Framework / axios error response. */
+export function getApiErrorMessage(err: unknown, fallback = "Something went wrong"): string {
+  if (axios.isAxiosError(err)) {
+    const data = err.response?.data;
+    if (data !== undefined) {
+      const messages = messagesFromValue(data);
+      if (messages.length > 0) return messages.join(". ");
+    }
+    if (err.response?.status && err.message.startsWith("Request failed")) {
+      return fallback;
+    }
+    return err.message || fallback;
+  }
+  if (err instanceof Error) return err.message;
+  return fallback;
+}