Fix Garmin token connection not persisting after save

Root cause: The setup-db script was missing user field definitions
(garminConnected, tokens, etc.). Production PocketBase had no such
fields, so updates silently failed to persist.

Changes:
- Add user custom fields to setup-db.ts (matches e2e harness)
- Fix status route to use strict boolean check (=== true)
- Add verification in tokens route with helpful error message
- Add ENCRYPTION_KEY to playwright config for e2e tests
- Add comprehensive e2e tests for Garmin connection flow

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

scripts/setup-db.ts

@@ -138,6 +138,57 @@ export const DAILY_LOGS_COLLECTION: CollectionDefinition = {
  */
 const REQUIRED_COLLECTIONS = [PERIOD_LOGS_COLLECTION, DAILY_LOGS_COLLECTION];
 
+/**
+ * Custom fields to add to the users collection.
+ * These are required for Garmin integration and app functionality.
+ */
+const USER_CUSTOM_FIELDS = [
+  { name: "garminConnected", type: "bool" },
+  { name: "garminOauth1Token", type: "text" },
+  { name: "garminOauth2Token", type: "text" },
+  { name: "garminTokenExpiresAt", type: "date" },
+  { name: "calendarToken", type: "text" },
+  { name: "lastPeriodDate", type: "date" },
+  { name: "cycleLength", type: "number" },
+  { name: "notificationTime", type: "text" },
+  { name: "timezone", type: "text" },
+  { name: "activeOverrides", type: "json" },
+];
+
+/**
+ * Adds custom fields to the users collection if they don't already exist.
+ * This is idempotent - safe to run multiple times.
+ */
+export async function addUserFields(pb: PocketBase): Promise<void> {
+  const usersCollection = await pb.collections.getOne("users");
+
+  // Get existing field names
+  const existingFieldNames = new Set(
+    (usersCollection.fields || []).map((f: { name: string }) => f.name),
+  );
+
+  // Filter to only new fields
+  const newFields = USER_CUSTOM_FIELDS.filter(
+    (f) => !existingFieldNames.has(f.name),
+  );
+
+  if (newFields.length > 0) {
+    // Combine existing fields with new ones
+    const allFields = [...(usersCollection.fields || []), ...newFields];
+
+    await pb.collections.update(usersCollection.id, {
+      fields: allFields,
+    });
+
+    console.log(
+      `  Added ${newFields.length} field(s) to users:`,
+      newFields.map((f) => f.name),
+    );
+  } else {
+    console.log("  All user fields already exist.");
+  }
+}
+
 /**
  * Gets the names of existing collections from PocketBase.
  */
@@ -242,6 +293,10 @@ async function main(): Promise<void> {
     process.exit(1);
   }
 
+  // Add custom fields to users collection
+  console.log("Checking users collection fields...");
+  await addUserFields(pb);
+
   // Get existing collections
   const existingNames = await getExistingCollectionNames(pb);
   console.log(