Redesign mobile time clock, add shortcuts, and improve account management.

Add iOS Shortcuts/Siri intents, local send-reminder notifications, stable
client picker with last-client defaults, account refresh/remove, and softer
session handling on unauthorized API responses.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/(app)/invoices/[id].tsx

@@ -46,6 +46,14 @@ export default function InvoiceDetailScreen() {
     onError: (err) => Alert.alert("Could not send invoice", err.message),
   });
 
+  const sendPaymentReminder = api.invoices.sendReminder.useMutation({
+    onSuccess: () => {
+      Alert.alert("Reminder sent", "Payment reminder emailed to the client.");
+      void utils.invoices.getById.invalidate({ id: id ?? "" });
+    },
+    onError: (err) => Alert.alert("Could not send reminder", err.message),
+  });
+
   if (!id) {
     return <LoadingScreen message="Invalid invoice" />;
   }
@@ -96,6 +104,28 @@ export default function InvoiceDetailScreen() {
     );
   }
 
+  function promptPaymentReminder() {
+    if (!clientEmail) {
+      Alert.alert(
+        "No client email",
+        "Add an email address to this client before sending payment reminders.",
+      );
+      return;
+    }
+
+    Alert.alert(
+      "Send payment reminder",
+      `Email a payment reminder to ${clientEmail}?`,
+      [
+        { text: "Cancel", style: "cancel" },
+        {
+          text: "Send",
+          onPress: () => sendPaymentReminder.mutate({ id: invoice.id }),
+        },
+      ],
+    );
+  }
+
   function promptStatusChange(current: InvoiceStatus) {
     const options: Array<{ label: string; status: "draft" | "sent" | "paid" }> = [];
     if (current !== "draft") options.push({ label: "Mark as draft", status: "draft" });
@@ -165,6 +195,16 @@ export default function InvoiceDetailScreen() {
           {invoice.taxRate > 0 ? (
             <DetailRow label="Tax rate" value={`${invoice.taxRate}%`} />
           ) : null}
+          {invoice.status === "draft" && invoice.sendReminderAt ? (
+            <DetailRow
+              label="Send reminder"
+              value={
+                new Date(invoice.sendReminderAt) <= new Date()
+                  ? "Due now"
+                  : formatDate(invoice.sendReminderAt)
+              }
+            />
+          ) : null}
         </Card>
 
         <Card title="Line items">
@@ -212,6 +252,14 @@ export default function InvoiceDetailScreen() {
               loading={sendInvoice.isPending}
             />
           ) : null}
+          {status === "sent" || status === "overdue" ? (
+            <Button
+              title="Send payment reminder"
+              variant="secondary"
+              onPress={promptPaymentReminder}
+              loading={sendPaymentReminder.isPending}
+            />
+          ) : null}
           <Button
             title="Edit invoice"
             variant="secondary"