Add interactive Base 4 track map with Leaflet.js

- Created new track-map page with aerial image and SVG overlay
- Implemented custom rotated square markers with obstacle numbers
- Added admin edit mode for placing and repositioning markers
- Database migration for track_obstacles table
- Modal form for adding new obstacles (replaces browser alerts)
- Drag-to-reposition functionality with auto-save
- Color-coded markers (green/red/black/split) for difficulty levels
- Clickable popups showing obstacle details
- Added track-map to navigation menu and sitemap
- URL rewrite rule for clean /track-map URL

docs/migrations/005_create_track_obstacles_table.sql

@@ -0,0 +1,25 @@
+-- ============================================================================
+-- MIGRATION: Create Track Obstacles Table
+-- Date: 2025-12-12
+-- Description: Create table to store 4x4 track obstacles with positioning and details
+-- ============================================================================
+
+CREATE TABLE IF NOT EXISTS track_obstacles (
+    obstacle_id INT PRIMARY KEY AUTO_INCREMENT,
+    name VARCHAR(100) NOT NULL COMMENT 'Obstacle name (e.g., "Rock Crawl", "Water Crossing")',
+    x_position INT NOT NULL COMMENT 'X pixel position on the track map',
+    y_position INT NOT NULL COMMENT 'Y pixel position on the track map',
+    difficulty VARCHAR(20) NOT NULL COMMENT 'Difficulty level (easy, medium, hard, extreme)',
+    description TEXT COMMENT 'Detailed description of the obstacle',
+    image_path VARCHAR(255) COMMENT 'Path to obstacle image (e.g., assets/images/obstacles/obstacle1.jpg)',
+    marker_color VARCHAR(20) NOT NULL COMMENT 'Marker color: red, green, black, or split (red-green)',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    INDEX idx_name (name),
+    INDEX idx_difficulty (difficulty)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
+
+-- ============================================================================
+-- ROLLBACK INSTRUCTIONS (if needed)
+-- ============================================================================
+-- DROP TABLE IF EXISTS track_obstacles;