Code maintainability fixes

src/services/exercises.ts

@@ -0,0 +1,27 @@
+import { ExerciseDef, WorkoutSet } from '../types';
+import { api } from './api';
+
+export const getExercises = async (userId: string): Promise<ExerciseDef[]> => {
+    try {
+        return await api.get<ExerciseDef[]>('/exercises');
+    } catch {
+        return [];
+    }
+};
+
+export const saveExercise = async (userId: string, exercise: ExerciseDef): Promise<void> => {
+    await api.post('/exercises', exercise);
+};
+
+export const getLastSetForExercise = async (userId: string, exerciseId: string): Promise<WorkoutSet | undefined> => {
+    try {
+        const response = await api.get<{ success: boolean; set?: WorkoutSet }>(`/exercises/${exerciseId}/last-set`);
+        if (response.success && response.set) {
+            return response.set;
+        }
+        return undefined;
+    } catch (error) {
+        console.error("Failed to fetch last set:", error);
+        return undefined;
+    }
+};