Fix PocketBase date query - use range operators not contains

The ~ contains operator doesn't work with PocketBase date fields.
Use >= and < operators with YYYY-MM-DD format instead, matching
the working /api/history pattern.

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

src/app/api/today/route.ts

@@ -74,16 +74,20 @@ export const GET = withAuth(async (_request, user, pb) => {
   // Sort by created DESC to get the most recent record if multiple exist
   let biometrics = { ...DEFAULT_BIOMETRICS, phaseLimit };
   try {
-    // Use YYYY-MM-DD format with contains operator for PocketBase date field
-    // PocketBase filters don't accept ISO format with T separator
+    // Use YYYY-MM-DD format with >= and < operators for PocketBase date field
+    // PocketBase accepts simple date strings in comparison operators
     const today = new Date().toISOString().split("T")[0];
+    const tomorrow = new Date(Date.now() + 86400000)
+      .toISOString()
+      .split("T")[0];
 
-    logger.info({ userId: user.id, date: today }, "Fetching dailyLog");
+    logger.info({ userId: user.id, today, tomorrow }, "Fetching dailyLog");
     const dailyLog = await pb
       .collection("dailyLogs")
-      .getFirstListItem<DailyLog>(`user="${user.id}" && date~"${today}"`, {
-        sort: "-created",
-      });
+      .getFirstListItem<DailyLog>(
+        `user="${user.id}" && date>="${today}" && date<"${tomorrow}"`,
+        { sort: "-created" },
+      );
 
     logger.info(
       {