Flood DMS V3 UI FIX BUILD

This build uses new static filenames (*_v3.css/js) so an older browser cache cannot keep showing the previous UI.

Applied:
1. Create Account inputs are constrained inside the card.
2. Tank water level uses animated water/waves.
3. Pump cards use ON rotor + flow animation.
4. Sites list + Site detail stretch to the bottom of the right map/log column.
5. Dashboard/management headers and Sites panel are no longer sticky.
6. Map supports hand/grab cursor, wheel zoom, double-click zoom and drag pan.
7. Logs and Configuration always leave Loading state and render live status or a useful API error.