Move documentation to docs/ directory and improve terminology

- Move ARCHITECTURE.md and CLAUDE.md to docs/ directory
- Replace "real-time" terminology with accurate "low-latency" and "high-performance"
- Update README to reflect correct performance characteristics
- Add comprehensive ICAO country database with SQLite backend
- Fix display options positioning and functionality
- Add map scale controls and improved range ring visibility
- Enhance aircraft marker orientation and trail management

🤖 Generated with [Claude Code](https://claude.ai/code)

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

assets/static/js/modules/map-manager.js

@@ -46,6 +46,13 @@ export class MapManager {
             maxZoom: 19
         }).addTo(this.map);
         
+        // Add scale control for distance estimation
+        L.control.scale({
+            metric: true,
+            imperial: true,
+            position: 'bottomright'
+        }).addTo(this.map);
+        
         return this.map;
     }
 
@@ -67,6 +74,13 @@ export class MapManager {
             this.coverageTileLayer = L.tileLayer('https://{s}.basemaps.cartocdn.com/light_all/{z}/{x}/{y}{r}.png', {
                 attribution: '&copy; <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
             }).addTo(this.coverageMap);
+            
+            // Add scale control for distance estimation
+            L.control.scale({
+                metric: true,
+                imperial: true,
+                position: 'bottomright'
+            }).addTo(this.coverageMap);
         }
         
         return this.coverageMap;
@@ -151,9 +165,9 @@ export class MapManager {
                         radius: range,
                         fillColor: 'transparent',
                         color: '#00d4ff',
-                        weight: 1,
-                        opacity: 0.3 - (index * 0.1),
-                        dashArray: '5,5'
+                        weight: 2,
+                        opacity: 0.7 - (index * 0.15),
+                        dashArray: '8,4'
                     }).addTo(this.map);
                     
                     this.rangeCircles.set(`${id}_${range}`, circle);
@@ -345,4 +359,14 @@ export class MapManager {
     setSelectedSource(sourceId) {
         this.selectedSource = sourceId;
     }
+
+    getSourcePositions() {
+        const positions = [];
+        for (const [id, source] of this.sourcesData) {
+            if (source.latitude && source.longitude) {
+                positions.push([source.latitude, source.longitude]);
+            }
+        }
+        return positions;
+    }
 }