feat: customizable business branding (name, logo, colors) (#63)

* feat: add customizable business branding (name, logo, colors)

Add admin settings for business branding with name, logo upload, and
color scheme via CSS custom properties. Includes database migration,
API endpoints, admin settings page, and dynamic branding in both
admin nav and customer portal.

Closes #61

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: address review feedback on branding PR

- Replace dynamic import with static import for @groombook/db in public branding endpoint
- Restore active nav item background highlight (bg-stone-100) in CustomerPortal
- Remove non-null assertion in settings route, add proper error handling

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* chore: trigger CI

* fix: resolve lint error and test failure for branding feature

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: update E2E tests for branding changes

- Update navigation test to expect "GroomBook" (default branding) instead
  of hardcoded "Paws & Reflect" since CustomerPortal now uses dynamic branding
- Add /api/branding mock to shared E2E fixtures so BrandingProvider resolves
  immediately in all tests, preventing unhandled fetch interference

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

---------

Co-authored-by: GroomBook CTO <cto@groombook.dev>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: GroomBook CTO <cto@groombook.app>

apps/web/src/App.tsx

@@ -8,9 +8,11 @@ import { InvoicesPage } from "./pages/Invoices.js";
 import { BookPage } from "./pages/Book.js";
 import { ReportsPage } from "./pages/Reports.js";
 import { GroupBookingPage } from "./pages/GroupBooking.js";
+import { SettingsPage } from "./pages/Settings.js";
 import { CustomerPortal } from "./portal/CustomerPortal.js";
 import { DevLoginSelector, getDevUser } from "./pages/DevLoginSelector.js";
 import { DevSessionIndicator } from "./components/DevSessionIndicator.js";
+import { BrandingProvider, useBranding } from "./BrandingContext.js";
 
 const NAV_LINKS = [
   { to: "/admin", label: "Appointments" },
@@ -20,11 +22,18 @@ const NAV_LINKS = [
   { to: "/admin/invoices", label: "Invoices" },
   { to: "/admin/group-bookings", label: "Group Bookings" },
   { to: "/admin/reports", label: "Reports" },
+  { to: "/admin/settings", label: "Settings" },
   { to: "/", label: "Customer Portal" },
 ];
 
 function AdminLayout() {
   const location = useLocation();
+  const { branding } = useBranding();
+
+  const logoSrc = branding.logoBase64 && branding.logoMimeType
+    ? `data:${branding.logoMimeType};base64,${branding.logoBase64}`
+    : null;
+
   return (
     <div style={{ minHeight: "100vh", fontFamily: "system-ui, sans-serif", background: "#f0f2f5" }}>
       <nav
@@ -42,14 +51,23 @@ function AdminLayout() {
           zIndex: 50,
         }}
       >
-        <strong style={{
+        <div style={{
+          display: "flex",
+          alignItems: "center",
+          gap: 8,
           marginRight: "1.25rem",
-          fontSize: 17,
-          color: "#1a202c",
-          letterSpacing: "-0.02em",
         }}>
-          <span style={{ color: "#4f8a6f" }}>Groom</span>Book
-        </strong>
+          {logoSrc && (
+            <img src={logoSrc} alt="" style={{ width: 24, height: 24, objectFit: "contain" }} />
+          )}
+          <strong style={{
+            fontSize: 17,
+            color: "#1a202c",
+            letterSpacing: "-0.02em",
+          }}>
+            {branding.businessName}
+          </strong>
+        </div>
         <Link
           to="/admin/book"
           style={{
@@ -59,7 +77,7 @@ function AdminLayout() {
             fontSize: 13,
             fontWeight: 600,
             color: "#fff",
-            background: "linear-gradient(135deg, #4f8a6f, #3d7a5f)",
+            background: branding.primaryColor,
             marginRight: "0.5rem",
             boxShadow: "0 1px 2px rgba(79, 138, 111, 0.3)",
           }}
@@ -100,6 +118,7 @@ function AdminLayout() {
           <Route path="/book" element={<BookPage />} />
           <Route path="/group-bookings" element={<GroupBookingPage />} />
           <Route path="/reports" element={<ReportsPage />} />
+          <Route path="/settings" element={<SettingsPage />} />
         </Routes>
       </main>
     </div>
@@ -130,21 +149,21 @@ export function App() {
     return <Navigate to="/login" replace />;
   }
 
-  if (location.pathname.startsWith("/admin")) {
-    return (
-      <>
-        <Routes>
-          <Route path="/admin/*" element={<AdminLayout />} />
-        </Routes>
-        {authDisabled && <DevSessionIndicator />}
-      </>
-    );
-  }
-
   return (
-    <>
-      <CustomerPortal />
-      {authDisabled && <DevSessionIndicator />}
-    </>
+    <BrandingProvider>
+      {location.pathname.startsWith("/admin") ? (
+        <>
+          <Routes>
+            <Route path="/admin/*" element={<AdminLayout />} />
+          </Routes>
+          {authDisabled && <DevSessionIndicator />}
+        </>
+      ) : (
+        <>
+          <CustomerPortal />
+          {authDisabled && <DevSessionIndicator />}
+        </>
+      )}
+    </BrandingProvider>
   );
 }