feat: convert ConnectionModal to /connection page with crypto deep links

- Add @kastov/cryptohapp + jsencrypt for encrypted Happ deep links
- Add templateEngine utility to resolve {{SUBSCRIPTION_LINK}},
  {{HAPP_CRYPT3_LINK}}, {{HAPP_CRYPT4_LINK}}, {{USERNAME}} templates
- Convert ConnectionModal component into a standalone Connection page
- Add /connection route with ProtectedRoute and lazy loading
- Replace modal invocation in Dashboard and Subscription with
  navigate('/connection')
- Add type and svgIconKey optional fields to RemnawaveButton
- Show button type badge and SVG icon in AdminApps BlockCard
- Refactor ThemeTab to use local draft state with Save/Cancel flow

src/App.tsx

@@ -26,6 +26,7 @@ const Contests = lazy(() => import('./pages/Contests'));
 const Polls = lazy(() => import('./pages/Polls'));
 const Info = lazy(() => import('./pages/Info'));
 const Wheel = lazy(() => import('./pages/Wheel'));
+const Connection = lazy(() => import('./pages/Connection'));
 const TopUpMethodSelect = lazy(() => import('./pages/TopUpMethodSelect'));
 const TopUpAmount = lazy(() => import('./pages/TopUpAmount'));
 
@@ -262,6 +263,16 @@ function App() {
             </ProtectedRoute>
           }
         />
+        <Route
+          path="/connection"
+          element={
+            <ProtectedRoute>
+              <LazyPage>
+                <Connection />
+              </LazyPage>
+            </ProtectedRoute>
+          }
+        />
 
         {/* Admin routes */}
         <Route