Fix Try It Out response display and improve dark mode support

Portal Generator Fixes:
- Fix Try It Out response not showing in default sidebar layout
  - Added min-height: 200px to .try-response-content and .try-response-body
  - Previously had min-height: 0 causing ACE editor containers to collapse
  - Added base display rules to .try-response for proper flex layout
  - Added .try-response.empty state CSS for default sidebar layout

- Add dark mode support for ACE editors
  - Dynamically switch between textmate (light) and monokai (dark) themes
  - Added getAceTheme(), updateAceEditorBackground(), updateAllAceEditors()
  - Integrated with dark mode toggle to update all editors on theme change
  - Removed hardcoded background colors to let themes handle styling

- Fix response display logic in sendRequest
  - Always show response with empty state before request
  - Override template's inline display:none
  - Properly remove empty class and show response after data loads

- Add comprehensive debug logging for troubleshooting
  - Log response div state, dimensions, and computed styles
  - Track ACE editor creation and display flow
  - Added console logs throughout sendRequest lifecycle

API Spec Improvements (agent-scanner-configuration-service):
- Refactor path parameters to use component references
  - All path parameters now reference components/parameters
  - Eliminates duplicate parameter definitions across endpoints
  - Uses x-origin annotated parameters for better documentation

- Remove redundant Authorization header parameters
  - Security scheme handles authentication globally
  - Removed 15+ duplicate Authorization parameter definitions
  - Cleaner spec following OpenAPI best practices

UI Polish:
- Added border-radius to select elements for consistency
- Improved x-origin source selector styling
- Added overflow handling for parameter descriptions

Author: machaval