Disable the onboarding process and improve database queries

Temporarily disable OnboardingPage route/component and refine task/financial record queries in DatabaseStorage to handle undefined rowCount.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 556aa286-edd2-4cea-8583-f4fc3cfd119b

client/src/App.tsx

@@ -8,7 +8,7 @@ import { ThemeProvider } from "@/context/ThemeContext";
 import LandingPage from "@/pages/LandingPage";
 import DashboardPage from "@/pages/DashboardPage";
 import LoginPage from "@/pages/LoginPage";
-import OnboardingPage from "@/pages/OnboardingPage";
+// import OnboardingPage from "@/pages/OnboardingPage";
 import NotFound from "@/pages/not-found";
 
 function Router() {
@@ -16,7 +16,7 @@ function Router() {
     <Switch>
       <Route path="/" component={LandingPage} />
       <Route path="/login" component={LoginPage} />
-      <Route path="/onboarding" component={OnboardingPage} />
+      {/* <Route path="/onboarding" component={OnboardingPage} /> */}
       <Route path="/dashboard" component={DashboardPage} />
       <Route component={NotFound} />
     </Switch>