perf: parallelize DB queries across routes, clean up fitness UI

Parallelize sequential DB queries in 11 API routes and page loaders
using Promise.all — measurements/latest, stats/overview, goal streak,
exercises, sessions, task stats, monthly expenses, icon page, offline-db.

Move calorie tracking out of /fitness/measure (now under /fitness/nutrition
only). Remove fade-in entrance animations from nutrition page.

Progressive streak computation: scan 3 months first, widen only if needed.

Bump versions to 1.1.1 / 0.2.1.

src/routes/api/cospend/monthly-expenses/+server.ts

@@ -20,20 +20,12 @@ export const GET: RequestHandler = async ({ url, locals }) => {
     const startDate = new Date();
     startDate.setMonth(startDate.getMonth() - monthsBack);
 
-    const totalPayments = await Payment.countDocuments();
-    const paymentsInRange = await Payment.countDocuments({
-      date: {
-        $gte: startDate,
-        $lte: endDate
-      }
-    });
-    const expensePayments = await Payment.countDocuments({
-      date: {
-        $gte: startDate,
-        $lte: endDate
-      },
-      category: { $ne: 'settlement' }
-    });
+    const dateRange = { $gte: startDate, $lte: endDate };
+    const [totalPayments, paymentsInRange, expensePayments] = await Promise.all([
+      Payment.countDocuments(),
+      Payment.countDocuments({ date: dateRange }),
+      Payment.countDocuments({ date: dateRange, category: { $ne: 'settlement' } })
+    ]);
 
     // Aggregate payments by month and category
     const pipeline = [