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)/timer.tsx

@@ -6,10 +6,12 @@ import { TabPage } from "@/components/TabPage";
 import { TimeClockPanel } from "@/components/time-clock/TimeClockPanel";
 
 export default function TimerScreen() {
-  const { clientId, invoiceId } = useLocalSearchParams<{
-    clientId?: string;
-    invoiceId?: string;
+  const params = useLocalSearchParams<{
+    clientId?: string | string[];
+    invoiceId?: string | string[];
   }>();
+  const clientId = Array.isArray(params.clientId) ? params.clientId[0] : params.clientId;
+  const invoiceId = Array.isArray(params.invoiceId) ? params.invoiceId[0] : params.invoiceId;
 
   return (
     <AppBackground>
@@ -21,8 +23,8 @@ export default function TimerScreen() {
               subtitle="Track billable hours and link them to invoices"
             />
           }
-          defaultClientId={clientId}
-          defaultInvoiceId={invoiceId}
+          defaultClientId={clientId ?? ""}
+          defaultInvoiceId={invoiceId ?? ""}
           compact
         />
       </TabPage>