Server Connectivity & Technical Indicators

A major milestone: the app can now run against a remote server. We set up an OVH backend and added a toggle to switch between local and server mode. Company search, data retrieval, and all the heavy lifting can now happen server-side.

On the charting side, Bollinger Bands and MACD indicators shipped with full configuration options. Credit ratings fetching got more reliable through LEI-based lookups instead of relying on ticker matching alone.