Fix auth modal feedback and production deploy config

client/src/lib/auth.ts

@@ -1,6 +1,19 @@
 import { API_URL } from "@/config";
 import type { User } from "@michess/types";
 
+const readErrorMessage = async (res: Response, fallback: string) => {
+    try {
+        const body = await res.json();
+        if (typeof body?.message === "string") {
+            return body.message;
+        }
+    } catch (err) {
+        // Response did not include a JSON error body.
+    }
+
+    return fallback;
+};
+
 export const fetchSession = async () => {
     try {
         const res = await fetch(`${API_URL}/v1/auth`, {
@@ -30,8 +43,10 @@ export const setGuestSession = async (name: string) => {
             const user: User = await res.json();
             return user;
         }
+        return await readErrorMessage(res, "Could not start guest session.");
     } catch (err) {
         console.error(err);
+        return "Could not reach the server. Please try again.";
     }
 };
 
@@ -48,12 +63,11 @@ export const register = async (name: string, password: string, email?: string) =
         if (res.status === 201) {
             const user: User = await res.json();
             return user;
-        } else if (res.status === 409) {
-            const { message } = await res.json();
-            return message as string;
         }
+        return await readErrorMessage(res, "Registration failed. Please try again.");
     } catch (err) {
         console.error(err);
+        return "Could not reach the server. Please try again.";
     }
 };
 
@@ -70,12 +84,11 @@ export const login = async (name: string, password: string) => {
         if (res.status === 200) {
             const user: User = await res.json();
             return user;
-        } else if (res.status === 404 || res.status === 401) {
-            const { message } = await res.json();
-            return message as string;
         }
+        return await readErrorMessage(res, "Login failed. Please try again.");
     } catch (err) {
         console.error(err);
+        return "Could not reach the server. Please try again.";
     }
 };
 
@@ -107,11 +120,10 @@ export const updateUser = async (name?: string, email?: string, password?: strin
         if (res.status === 200) {
             const user: User = await res.json();
             return user;
-        } else if (res.status === 409) {
-            const { message } = await res.json();
-            return message as string;
         }
+        return await readErrorMessage(res, "Could not update settings. Please try again.");
     } catch (err) {
         console.error(err);
+        return "Could not reach the server. Please try again.";
     }
 };