Add popup persistence and update project docs

- Popups now stay open during live BT tracking updates
- Track open popup device ID and restore after marker refresh
- Update TASKS.md, TODO.md, PROJECT.md, ROADMAP.md
- Mark position smoothing, floor persistence as complete

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

PROJECT.md

@@ -18,15 +18,17 @@ Understanding the RF environment around you is useful for:
 ## Key Features
 
 - **WiFi Scanning** - Discover networks with SSID, BSSID, RSSI, channel, encryption
-- **Bluetooth Scanning** - Classic BT and BLE device discovery with device type inference
+- **Bluetooth Scanning** - BLE device discovery via bleak library with reliable RSSI
 - **Distance Estimation** - RSSI-based distance calculation using log-distance path loss model
 - **OUI Lookup** - Manufacturer identification from MAC addresses
 - **Web Dashboard** - Real-time visualization with multiple views:
   - Radar view (polar plot)
   - 2D World Map (Leaflet/OpenStreetMap)
   - 3D Building Map (MapLibre GL JS)
-- **Floor-based Positioning** - Assign devices to building floors
-- **Live Tracking** - Real-time Bluetooth tracking mode
+- **Floor-based Positioning** - Assign devices to building floors (persisted in database)
+- **Live Tracking** - Real-time Bluetooth tracking (auto-starts, 4-second intervals)
+- **Movement Detection** - Statistical analysis to detect moving devices (purple markers)
+- **Historical Database** - SQLite storage for device history, RSSI time-series, statistics
 - **Auto-scan** - Scheduled background scanning
 - **Data Export** - JSON scan history with timestamps
 
@@ -71,8 +73,8 @@ Understanding the RF environment around you is useful for:
 - Linux (tested on Raspberry Pi OS / Debian)
 - Python 3.11+
 - `iw` - WiFi scanning
-- `hcitool` / `bluetoothctl` - Bluetooth scanning
-- `sudo` access for RF scanning
+- BlueZ/D-Bus - Bluetooth (via bleak library)
+- `sudo` access for WiFi scanning
 
 ### Python
 - Flask - Web framework