Refactor user initialization and balance retrieval logic

- Updated the `InitUser` component to handle session state more effectively by incorporating a loading state.
- Removed the unused `useAuthQuery` hook and adjusted the balance initialization logic to only proceed when the session is confirmed.
- Enhanced the `getBalance` query with improved error handling and logging for better debugging.
- Modified the `initBalance` mutation to return an object indicating whether a new balance was created, improving clarity in the initialization process.

components/init-user.tsx

@@ -2,7 +2,6 @@
 
 import { authClient } from "@/lib/auth-client";
 import { useMutation } from "convex/react";
-import { useAuthQuery } from "@/hooks/use-auth-query";
 import { api } from "@/convex/_generated/api";
 import { useEffect, useRef } from "react";
 import { useTranslations } from "next-intl";
@@ -15,32 +14,28 @@ import { toast } from "@/lib/toast";
  */
 export function InitUser() {
   const t = useTranslations('toasts');
-  const { data: session } = authClient.useSession();
+  const { data: session, isPending: isSessionPending } = authClient.useSession();
 
-  const balance = useAuthQuery(api.credits.getBalance);
   const initBalance = useMutation(api.credits.initBalance);
   const initStartedRef = useRef(false);
 
   useEffect(() => {
-    if (
-      !session?.user ||
-      !balance ||
-      balance.balance !== 0 ||
-      balance.monthlyAllocation !== 0
-    ) {
+    if (isSessionPending || !session?.user) {
       return;
     }
     if (initStartedRef.current) return;
     initStartedRef.current = true;
 
     void initBalance()
-      .then(() => {
+      .then((result) => {
+        if (result.created) {
           toast.success(t('auth.initialSetupTitle'), t('auth.initialSetupDesc'));
+        }
       })
       .catch(() => {
         initStartedRef.current = false;
       });
-  }, [t, session?.user, balance, initBalance]);
+  }, [t, initBalance, isSessionPending, session?.user]);
 
   return null;
 }

convex/credits.ts

@@ -60,7 +60,19 @@ const PERFORMANCE_LOG_THRESHOLD_MS = 250;
 export const getBalance = query({
   args: {},
   handler: async (ctx) => {
+    const startedAt = Date.now();
+
+    try {
+      console.info("[credits.getBalance] start", {
+        durationMs: Date.now() - startedAt,
+      });
+
       const user = await optionalAuth(ctx);
+      console.info("[credits.getBalance] auth resolved", {
+        durationMs: Date.now() - startedAt,
+        userId: user?.userId ?? null,
+      });
+
       if (!user) {
         return { balance: 0, reserved: 0, available: 0, monthlyAllocation: 0 };
       }
@@ -69,6 +81,12 @@ export const getBalance = query({
         .withIndex("by_user", (q) => q.eq("userId", user.userId))
         .unique();
 
+      console.info("[credits.getBalance] balance query resolved", {
+        durationMs: Date.now() - startedAt,
+        userId: user.userId,
+        foundBalance: Boolean(balance),
+      });
+
       if (!balance) {
         return { balance: 0, reserved: 0, available: 0, monthlyAllocation: 0 };
       }
@@ -79,6 +97,17 @@ export const getBalance = query({
         available: balance.balance - balance.reserved,
         monthlyAllocation: balance.monthlyAllocation,
       };
+    } catch (error) {
+      const identity = await ctx.auth.getUserIdentity();
+      console.error("[credits.getBalance] failed", {
+        durationMs: Date.now() - startedAt,
+        hasIdentity: Boolean(identity),
+        identityIssuer: identity?.issuer ?? null,
+        identitySubject: identity?.subject ?? null,
+        message: error instanceof Error ? error.message : String(error),
+      });
+      throw error;
+    }
   },
 });
 
@@ -295,7 +324,9 @@ export const initBalance = mutation({
       .withIndex("by_user", (q) => q.eq("userId", user.userId))
       .unique();
 
-    if (existing) return existing._id;
+    if (existing) {
+      return { balanceId: existing._id, created: false };
+    }
 
     // Free-Tier Credits als Startguthaben
     const balanceId = await ctx.db.insert("creditBalances", {
@@ -324,7 +355,7 @@ export const initBalance = mutation({
       description: "Startguthaben — Free Tier",
     });
 
-    return balanceId;
+    return { balanceId, created: true };
   },
 });