feat: multi-Oracle server support with runtime switching

Complete implementation of multi-server Oracle database support:

Backend:
- Multi-pool Oracle with lazy loading per server
- Email-to-server cache for automatic server discovery
- JWT tokens include server_id claim
- /auth/check-identity and /auth/check-email endpoints
- /auth/my-servers endpoint for listing user's accessible servers
- Server switch with password re-authentication

Frontend:
- New ServerSelector component for header dropdown
- Multi-step login flow (identity → server → password)
- Server switching from header with password modal
- Mobile drawer menu with server selection
- Dark mode support for all new components
- URL bookmark support with ?server= query param

Scripts:
- Unified start.sh replacing start-prod.sh/start-test.sh
- Unified ssh-tunnel.sh with multi-server support
- Updated status.sh for new architecture

Tests:
- E2E tests for multi-server and single-server login flows
- Backend unit tests for all new endpoints
- Oracle multi-pool integration tests

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/modules/reports/views/BankCashRegisterView.vue

@@ -19,7 +19,11 @@
       :user="authStore.user"
       :companies-store="companyStore"
       :period-store="periodStore"
+      :available-servers="authStore.availableServers"
+      :current-server-id="authStore.selectedServerId"
+      :auth-store="authStore"
       @logout="handleLogout"
+      @server-switched="handleServerSwitched"
     />
 
     <!-- US-109: Filter BottomSheet for mobile -->
@@ -425,6 +429,16 @@ const handleLogout = async () => {
   router.push('/login');
 };
 
+// Handle server switch completed - reload data for new server
+const handleServerSwitched = async (newServerId) => {
+  // Server switch already completed in MobileDrawerMenu modal
+  // Reload data for the new server
+  await companyStore.loadCompanies();
+  if (companyStore.selectedCompany?.id_firma) {
+    await periodStore.loadPeriods(companyStore.selectedCompany.id_firma);
+  }
+};
+
 // US-501: Mobile TopBar actions (filter, reset, export dropdown)
 const mobileTopBarActions = computed(() => [
   {