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>

.eslintrc.cjs

@@ -0,0 +1,31 @@
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+  env: {
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+    browser: true,
+    es2022: true
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+  extends: [
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+  parserOptions: {
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+    sourceType: 'module'
+  },
+  plugins: ['vue'],
+  // Ignore TypeScript Vue files (no TS parser configured)
+  ignorePatterns: ['**/*.ts', '**/SolduriCompactCard.vue'],
+  rules: {
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+    'vue/no-mutating-props': 'warn',  // Common pattern with v-model
+    'vue/no-parsing-error': 'warn'  // Template expressions with < > operators
+  }
+}