Fix Garmin intensity minutes and add user-configurable phase goals

- Apply 2x multiplier for vigorous intensity minutes (matches Garmin)
- Use calendar week (Mon-Sun) instead of trailing 7 days for intensity
- Add HRV yesterday fallback when today's data returns empty
- Add user-configurable phase intensity goals with new defaults:
  - Menstrual: 75, Follicular: 150, Ovulation: 100
  - Early Luteal: 120, Late Luteal: 50
- Update garmin-sync and today routes to use user-specific phase limits

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/setup-db.ts

@@ -156,6 +156,12 @@ export const USER_CUSTOM_FIELDS: CollectionField[] = [
   { name: "notificationTime", type: "text" },
   { name: "timezone", type: "text" },
   { name: "activeOverrides", type: "json" },
+  // Phase-specific intensity goals (weekly minutes)
+  { name: "intensityGoalMenstrual", type: "number" },
+  { name: "intensityGoalFollicular", type: "number" },
+  { name: "intensityGoalOvulation", type: "number" },
+  { name: "intensityGoalEarlyLuteal", type: "number" },
+  { name: "intensityGoalLateLuteal", type: "number" },
 ];
 
 /**