feat: add cardio PRs for longest distance and fastest pace by range

Track longestDistance and fastestPace PRs for cardio exercises with
activity-specific distance ranges: running (0-3, 3-7, 7-21.1, 21.1-42.2,
42.2+ km), swimming (0-0.4, 0.4-1.5, 1.5-5, 5-10, 10+ km), cycling
(0-15, 15-40, 40-100, 100-200, 200+ km), hiking (0-5, 5-15, 15-30,
30-50, 50+ km), rowing (0-2, 2-5, 5-10, 10-21.1, 21.1+ km).

Shared detection logic in cardioPrRanges.ts used by both session save
and recalculate endpoints. Display support in history detail and workout
completion summary.

src/routes/api/fitness/sessions/+server.ts

@@ -5,6 +5,7 @@ import { WorkoutSession } from '$models/WorkoutSession';
 import type { IPr } from '$models/WorkoutSession';
 import { WorkoutTemplate } from '$models/WorkoutTemplate';
 import { getExerciseById, getExerciseMetrics } from '$lib/data/exercises';
+import { detectCardioPrs } from '$lib/data/cardioPrRanges';
 
 function estimatedOneRepMax(weight: number, reps: number): number {
   if (reps <= 0 || weight <= 0) return 0;
@@ -89,7 +90,6 @@ export const POST: RequestHandler = async ({ request, locals }) => {
       const exercise = getExerciseById(ex.exerciseId);
       const metrics = getExerciseMetrics(exercise);
       const isCardio = metrics.includes('distance');
-      if (isCardio) continue;
 
       const completedSets = (ex.sets ?? []).filter((s: { completed: boolean }) => s.completed);
       if (completedSets.length === 0) continue;
@@ -100,6 +100,11 @@ export const POST: RequestHandler = async ({ request, locals }) => {
         'exercises.exerciseId': ex.exerciseId,
       }).sort({ startTime: -1 }).limit(50).lean();
 
+      if (isCardio) {
+        prs.push(...detectCardioPrs(ex.exerciseId, completedSets, prevSessions));
+        continue;
+      }
+
       const isBilateral = exercise?.bilateral ?? false;
       const weightMul = isBilateral ? 2 : 1;
 

src/routes/api/fitness/sessions/[id]/recalculate/+server.ts

@@ -4,6 +4,7 @@ import { dbConnect } from '$utils/db';
 import { WorkoutSession } from '$models/WorkoutSession';
 import type { IPr } from '$models/WorkoutSession';
 import { getExerciseById, getExerciseMetrics } from '$lib/data/exercises';
+import { detectCardioPrs } from '$lib/data/cardioPrRanges';
 import { simplifyTrack } from '$lib/server/simplifyTrack';
 import mongoose from 'mongoose';
 
@@ -64,7 +65,7 @@ export const POST: RequestHandler = async ({ params, locals }) => {
 		for (const ex of workoutSession.exercises) {
 			const exercise = getExerciseById(ex.exerciseId);
 			const metrics = getExerciseMetrics(exercise);
-			if (metrics.includes('distance')) continue;
+			const isCardio = metrics.includes('distance');
 
 			const completedSets = ex.sets.filter(s => s.completed);
 			if (completedSets.length === 0) continue;
@@ -76,6 +77,11 @@ export const POST: RequestHandler = async ({ params, locals }) => {
 				startTime: { $lt: workoutSession.startTime }
 			}).sort({ startTime: -1 }).limit(50).lean();
 
+			if (isCardio) {
+				prs.push(...detectCardioPrs(ex.exerciseId, completedSets, prevSessions));
+				continue;
+			}
+
 			const isBilateral = exercise?.bilateral ?? false;
 			const weightMul = isBilateral ? 2 : 1;