style: apply prettier across the tree

One-shot prettier pass so the new format:check gate starts from a clean
baseline. Formatting only — no behaviour change. Generator-owned and
vendored artifacts stay untouched via .prettierignore.

src/lib/sources/__tests__/pick-canonical-workout.test.ts

@@ -198,9 +198,7 @@ describe("pickCanonicalWorkout — determinism", () => {
       row("apple-1", "APPLE_HEALTH", "2026-05-14T07:30:00.000Z"),
       row("withings-1", "WITHINGS", "2026-05-14T07:31:00.000Z"),
     ]);
-    expect(a.canonical.map((r) => r.id)).toEqual(
-      b.canonical.map((r) => r.id),
-    );
+    expect(a.canonical.map((r) => r.id)).toEqual(b.canonical.map((r) => r.id));
   });
 
   it("breaks same-timestamp ties via id ordering", () => {

src/lib/sources/__tests__/source-priority-withings-applehealth.test.ts

@@ -124,12 +124,7 @@ describe("cross-source priority — Withings Activity + Apple Health", () => {
     const userPriority = {
       steps: ["WITHINGS", "APPLE_HEALTH", "MANUAL"],
     };
-    const out = pickCanonicalSourceRows(
-      rows,
-      "steps",
-      userPriority,
-      isoDayKey,
-    );
+    const out = pickCanonicalSourceRows(rows, "steps", userPriority, isoDayKey);
     expect(out.canonicalRows).toHaveLength(1);
     expect(out.canonicalRows[0].source).toBe("WITHINGS");
     expect(out.canonicalRows[0].value).toBe(5000);

src/lib/sources/pick-canonical-workout.ts

@@ -152,8 +152,7 @@ export function pickCanonicalWorkout<T extends WorkoutPickerRow>(
     return { canonical: [], clusters: [] };
   }
 
-  const ladder =
-    options.sourcePriority ?? DEFAULT_WORKOUT_SOURCE_PRIORITY;
+  const ladder = options.sourcePriority ?? DEFAULT_WORKOUT_SOURCE_PRIORITY;
   const proximityMinutes =
     options.proximityMinutes ?? DEFAULT_WORKOUT_PROXIMITY_MINUTES;
   const proximityMs = proximityMinutes * 60_000;