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/css/style.css

@@ -193,6 +193,48 @@ body {
     background: #404040;
 }
 
+.display-options {
+    position: absolute;
+    top: 10px;
+    left: 10px;
+    z-index: 1000;
+    background: rgba(45, 45, 45, 0.95);
+    border: 1px solid #404040;
+    border-radius: 8px;
+    padding: 1rem;
+    min-width: 200px;
+}
+
+.display-options h4 {
+    margin-bottom: 0.5rem;
+    color: #ffffff;
+    font-size: 0.9rem;
+}
+
+.option-group {
+    display: flex;
+    flex-direction: column;
+    gap: 0.5rem;
+}
+
+.option-group label {
+    display: flex;
+    align-items: center;
+    cursor: pointer;
+    font-size: 0.8rem;
+    color: #cccccc;
+}
+
+.option-group input[type="checkbox"] {
+    margin-right: 0.5rem;
+    accent-color: #00d4ff;
+    transform: scale(1.1);
+}
+
+.option-group label:hover {
+    color: #ffffff;
+}
+
 .legend {
     position: absolute;
     bottom: 10px;