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/api/adminApps.ts

@@ -50,91 +50,6 @@ export interface AppConfigResponse {
 }
 
 export const adminAppsApi = {
-  // Get full app config
-  getConfig: async (): Promise<AppConfigResponse> => {
-    const response = await apiClient.get<AppConfigResponse>('/cabinet/admin/apps');
-    return response.data;
-  },
-
-  // Get available platforms
-  getPlatforms: async (): Promise<string[]> => {
-    const response = await apiClient.get<string[]>('/cabinet/admin/apps/platforms');
-    return response.data;
-  },
-
-  // Get apps for a platform
-  getPlatformApps: async (platform: string): Promise<AppDefinition[]> => {
-    const response = await apiClient.get<AppDefinition[]>(
-      `/cabinet/admin/apps/platforms/${platform}`,
-    );
-    return response.data;
-  },
-
-  // Create a new app
-  createApp: async (platform: string, app: AppDefinition): Promise<AppDefinition> => {
-    const response = await apiClient.post<AppDefinition>(
-      `/cabinet/admin/apps/platforms/${platform}`,
-      {
-        platform,
-        app,
-      },
-    );
-    return response.data;
-  },
-
-  // Update an app
-  updateApp: async (
-    platform: string,
-    appId: string,
-    app: AppDefinition,
-  ): Promise<AppDefinition> => {
-    const response = await apiClient.put<AppDefinition>(
-      `/cabinet/admin/apps/platforms/${platform}/${appId}`,
-      {
-        app,
-      },
-    );
-    return response.data;
-  },
-
-  // Delete an app
-  deleteApp: async (platform: string, appId: string): Promise<void> => {
-    await apiClient.delete(`/cabinet/admin/apps/platforms/${platform}/${appId}`);
-  },
-
-  // Reorder apps
-  reorderApps: async (platform: string, appIds: string[]): Promise<void> => {
-    await apiClient.post(`/cabinet/admin/apps/platforms/${platform}/reorder`, {
-      app_ids: appIds,
-    });
-  },
-
-  // Copy app to another platform
-  copyApp: async (
-    platform: string,
-    appId: string,
-    targetPlatform: string,
-  ): Promise<{ new_id: string }> => {
-    const response = await apiClient.post<{ new_id: string; target_platform: string }>(
-      `/cabinet/admin/apps/platforms/${platform}/copy/${appId}?target_platform=${targetPlatform}`,
-    );
-    return response.data;
-  },
-
-  // Get branding
-  getBranding: async (): Promise<AppConfigBranding> => {
-    const response = await apiClient.get<AppConfigBranding>('/cabinet/admin/apps/branding');
-    return response.data;
-  },
-
-  // Update branding
-  updateBranding: async (branding: AppConfigBranding): Promise<AppConfigBranding> => {
-    const response = await apiClient.put<AppConfigBranding>('/cabinet/admin/apps/branding', {
-      branding,
-    });
-    return response.data;
-  },
-
   // Get RemnaWave config status
   getRemnaWaveStatus: async (): Promise<{ enabled: boolean; config_uuid: string | null }> => {
     const response = await apiClient.get<{ enabled: boolean; config_uuid: string | null }>(
@@ -181,6 +96,8 @@ export const adminAppsApi = {
 export interface RemnawaveButton {
   url: string;
   text: LocalizedText;
+  type?: 'external' | 'subscriptionLink' | 'copyButton';
+  svgIconKey?: string;
 }
 
 export interface RemnawaveBlock {