fix(portal/book): wire Rebook Now button + date format validation (GRO-265, GRO-266)

* fix(portal): wire Rebook Now button to navigate to booking wizard (GRO-265)

The "Rebook Now" button on the Report Card detail view had no click
handler. Now navigates to /admin/book with pet info pre-filled via URL
params (petName, serviceName). Button text changed from "Book Now" to
"Rebook Now" per the bug report.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

* fix(book): pre-fill form from URL params to ensure React state is set

Add useSearchParams to read URL parameters (e.g., ?clientName=Jane)
and sync them to the BookingBody state on mount via useEffect.
This ensures validation checks React state, not empty initial state.

Fixes GRO-255

Co-Authored-By: Paperclip <noreply@paperclip.ing>

* fix(book): add inline validation for date input format (GRO-266)

Date picker now shows a clear error when the value doesn't match
YYYY-MM-DD, instead of silently failing with a browser console warning.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

* fix(portal): wire Rebook Now button + clean .js artifacts (GRO-265)

Cherry-picked from contaminated PR #160:
- ReportCards.tsx: Rebook Now button navigates to /admin/book with pet info
- Book.tsx: pre-fill form from URL params (GRO-255)
- Book.tsx: inline date validation (GRO-266)

Also removes compiled .js artifacts (Book.js, ReportCards.js)
that were incorrectly committed.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

---------

Co-authored-by: groombook-ci[bot] <ci@groombook.bot>
Co-authored-by: Paperclip <noreply@paperclip.ing>

apps/web/src/portal/sections/ReportCards.tsx

@@ -241,8 +241,17 @@ function ReportCardDetail({ card, onBack }: { card: Appointment; onBack: () => v
               <p className="text-sm font-medium text-stone-800">Book your next visit</p>
               <p className="text-xs text-stone-500">Schedule your next grooming appointment</p>
             </div>
-            <button className="px-4 py-2 bg-(--color-accent) text-white rounded-lg text-sm font-medium hover:bg-(--color-accent-hover)">
-              Book Now
+            <button
+              onClick={() => {
+                // TODO: Pre-select the service from report card (serviceId/serviceName) once BookPage supports service pre-selection via URL param
+                const params = new URLSearchParams();
+                if (card.petName) params.set("petName", card.petName);
+                if (card.serviceName) params.set("serviceName", card.serviceName);
+                window.location.href = `/admin/book${params.size > 0 ? `?${params.toString()}` : ""}`;
+              }}
+              className="px-4 py-2 bg-(--color-accent) text-white rounded-lg text-sm font-medium hover:bg-(--color-accent-hover)"
+            >
+              Rebook Now
             </button>
           </div>
         </div>