Add Positive Pay, statement guide v1.0, onboarding, and switch every feature on

- Positive Pay on the 12 Oct /pps contract (account number, not account ID):
  OTP enrollment, cheque submit, saved cheques, detail and stop payment.
  Full flow passed on the phone against mobile-banking-backend.lincpay.
- Statement & Mini Statement guide v1.0 (14 Oct): mini statement JSON on
  Home and the Statement screen; dated PDF export with the password rule.
- Onboarding slides and splash screen, Inter font, shared Icon and
  TypewriterText components, nearby branches via OpenStreetMap.
- Every feature switched on; the 14 Oct switch set is kept in
  featureConfig.stage-2026-10-14.ts. Loans run on demo data until the
  backend has /loans routes.
- npm run android wraps run-android for shells spawned from VS Code.
- OpenProject work packages updated to 14-10-2026 status, with screenshots
  of Positive Pay, statement, loans and cards.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

android/app/build.gradle

@@ -117,3 +117,25 @@ dependencies {
         implementation jscFlavor
     }
 }
+
+/**
+ * Makes `gradlew clean` (and Android Studio's Clean Project) work.
+ *
+ * The app's native clean re-runs CMake before cleaning, and the app's CMake
+ * build pulls in each library's codegen output from
+ * node_modules/<lib>/android/build/generated/. `clean` deletes those library
+ * build folders first, so the configure step fails with "add_subdirectory given
+ * source ... which is not an existing directory" and the whole clean fails.
+ *
+ * There is nothing for that step to do that deleting the CMake folder does not
+ * do better, so it is skipped and `.cxx` goes with `build/`. The next build
+ * regenerates the codegen output before CMake needs it.
+ */
+tasks.configureEach { task ->
+    if (task.name.startsWith("externalNativeBuildClean")) {
+        task.enabled = false
+    }
+}
+tasks.named("clean") {
+    delete file(".cxx")
+}