add orders collecrtion for coins and subscriptions page

src/screens/Studio/ComposeSong.js

@@ -6,7 +6,7 @@ import BorderGradientButton from "../../components/BorderGradientButton";
 import GradientButton from "../../components/GradientButton";
 import MusicLandHeader from "../../components/MusicLandHeader";
 import AppAlert from "../../components/Alert";
-import firebase, { usersRef } from "../../config/firebase";
+import firebase, { getFunctionsClient } from "../../config/firebase";
 import Page from "../../layouts/Page";
 import { Routes } from "../../navigation";
 import { goBack, navigate } from "../../navigation/NavigationService";
@@ -50,29 +50,18 @@ const ComposeSong = () => {
     useState(false);
 
   const coinBalance = useMemo(() => {
-    const data = currentUserData || {};
-    const candidates = [
-      data?.coins,
-      data?.coinBalance,
-      data?.coin,
-      data?.wallet?.coins,
-      data?.wallet?.coinBalance,
-    ];
-
-    for (const value of candidates) {
-      if (typeof value === "number" && Number.isFinite(value)) {
-        return value;
-      }
-      if (typeof value === "string") {
-        const parsed = Number(value);
-        if (Number.isFinite(parsed)) {
-          return parsed;
-        }
+    const value = currentUserData?.coins;
+    if (typeof value === "number" && Number.isFinite(value)) {
+      return value;
+    }
+    if (typeof value === "string") {
+      const parsed = Number(value);
+      if (Number.isFinite(parsed)) {
+        return parsed;
       }
     }
-
     return 0;
-  }, [currentUserData]);
+  }, [currentUserData?.coins]);
 
   const formattedCoinBalance = useMemo(() => {
     try {
@@ -154,24 +143,29 @@ const ComposeSong = () => {
       throw new Error("Utilisateur introuvable. Merci de réessayer.");
     }
 
-    const decrement = firebase.firestore.FieldValue.increment(
-      -MUSIC_GENERATION_COIN_COST,
-    );
-    const timestamp = firebase.firestore.FieldValue.serverTimestamp();
+    try {
+      const functionsClient = getFunctionsClient();
+      const createSongOrder =
+        functionsClient.httpsCallable("orders-createSongOrder");
 
-    await usersRef.doc(currentUID).set(
-      {
-        coins: decrement,
-        coinBalance: decrement,
-        wallet: {
-          coins: decrement,
-          coinBalance: decrement,
-        },
-        lastCoinSpendAt: timestamp,
-        lastCoinSpendAmount: MUSIC_GENERATION_COIN_COST,
-      },
-      { merge: true },
-    );
+      await createSongOrder({
+        amount: -MUSIC_GENERATION_COIN_COST,
+        songId: selectedProjectId || null,
+        source: "music_generation",
+      });
+    } catch (error) {
+      const message =
+        typeof error?.message === "string"
+          ? error.message.replace(
+              /^functions\.https\.HttpsError:\s*/iu,
+              "",
+            )
+          : null;
+      throw new Error(
+        message ||
+          "Une erreur est survenue lors de la création de la commande de crédits.",
+      );
+    }
   };
 
   const handleConfirmGeneration = async () => {