The duplicate functions at lines 455-486 were redefining cacheElements and
bindEvents with wrong element IDs (kebab-case vs camelCase in HTML).
This caused 'Cannot read properties of null' error on slides app init.
- Remove hx-trigger='load' from social sidebar sections
- Replace loading placeholders with static empty state messages
- Add empty-state CSS styling
- Prevents page from breaking when backend APIs are not available