fix(db): replace crypto.randomUUID with custom UUID generator

src/db/operations.ts

@@ -1,4 +1,5 @@
 import { db } from "./client";
+import { generateUUID } from "../utils/uuid";
 import { workouts, sets, laps, templates } from "./schema";
 import { eq, desc, sql } from "drizzle-orm";
 import type { WorkoutSet, LapData } from "@types/workout";
@@ -6,7 +7,7 @@ import type { WorkoutSet, LapData } from "@types/workout";
 // ─── Templates ───────────────────────────────────────────────
 
 export async function saveTemplate(name: string, poolLength: number, setsData: WorkoutSet[]) {
-  const id = crypto.randomUUID();
+  const id = generateUUID();
   await db.insert(templates).values({
     id,
     name,
@@ -37,7 +38,7 @@ export async function saveWorkout(
   setsData: WorkoutSet[],
   templateId?: string
 ) {
-  const workoutId = crypto.randomUUID();
+  const workoutId = generateUUID();
   const totalDistance = setsData.reduce((acc, s) => acc + s.distancePerRep * s.repCount, 0);
 
   await db.insert(workouts).values({
@@ -53,7 +54,7 @@ export async function saveWorkout(
   for (let i = 0; i < setsData.length; i++) {
     const s = setsData[i];
     await db.insert(sets).values({
-      id: crypto.randomUUID(),
+      id: generateUUID(),
       workoutId,
       position: i + 1,
       stroke: s.stroke,
@@ -112,7 +113,7 @@ export async function saveLap(workoutId: string, lap: LapData) {
     lap.strokeCount != null ? lap.strokeCount + Math.round(lap.duration) : null;
 
   await db.insert(laps).values({
-    id: crypto.randomUUID(),
+    id: generateUUID(),
     workoutId,
     setPosition: lap.setPosition,
     repNumber: lap.repNumber,

src/features/workout-builder/screens/BuilderScreen.tsx

@@ -29,7 +29,8 @@ export function BuilderScreen() {
       const workoutId = await save(poolLength);
       navigation.navigate("PreSwim", { workoutId });
     } catch (e) {
-      Alert.alert("Error", "Failed to save workout");
+      console.error("Failed to save workout:", e);
+      Alert.alert("Error", `Failed to save workout: ${e}`);
     }
   };
 

src/utils/uuid.ts

@@ -0,0 +1,7 @@
+export function generateUUID(): string {
+  return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, (c) => {
+    const r = (Math.random() * 16) | 0;
+    const v = c === "x" ? r : (r & 0x3) | 0x8;
+    return v.toString(16);
+  });
+}