Add request logging mode, dark mode, Account hub, profile, vehicle CRUD, cards view

- Client: logRequests option + redacted request/response logging (setLogRequests to
  toggle at runtime); enabled via app extra.debugHttp for on-device 401 debugging
- Dark mode (persisted) via ThemeProvider + React Navigation theme
- New "Account" tab: Profile (view), Vehicles (full CRUD), Payment methods (view-only),
  About, dark-mode + request-logging toggles, sign out

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

parksmarter-client/src/client.ts

@@ -45,6 +45,10 @@ export interface ParkSmarterClientOptions {
   uuid?: () => string;
   /** Called when any authenticated request returns 401 (token cleared automatically). */
   onUnauthorized?: () => void;
+  /** Log every request/response (redacted) — useful for on-device debugging via logcat. */
+  logRequests?: boolean;
+  /** Where log lines go (default console.log). */
+  logSink?: (line: string) => void;
 }
 
 function resolveEnvironment(
@@ -69,6 +73,8 @@ export class ParkSmarterClient {
       fetchImpl: options.fetchImpl,
       uuid: options.uuid,
       onUnauthorized: options.onUnauthorized,
+      logRequests: options.logRequests,
+      logSink: options.logSink,
     });
   }
 
@@ -77,6 +83,11 @@ export class ParkSmarterClient {
     this.http.setLocaleCode(localeCode);
   }
 
+  /** Toggle redacted request/response logging at runtime. */
+  setLogRequests(on: boolean): void {
+    this.http.setLogRequests(on);
+  }
+
   private unwrap<D>(p: Promise<ParkSmarterResponse<D>>): Promise<D> {
     return p.then((r) => r.data);
   }