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lib/core/constants/app_constants.dart

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+class AppConstants {
+  AppConstants._();
+
+  // Database
+  static const String databaseName = 'bully_targets.db';
+  static const int databaseVersion = 1;
+
+  // Tables
+  static const String sessionsTable = 'sessions';
+  static const String shotsTable = 'shots';
+
+  // Image processing
+  static const double minImpactRadius = 2.0;
+  static const double maxImpactRadius = 20.0;
+  static const int gaussianBlurSize = 5;
+  static const double houghCirclesDp = 1.0;
+  static const double houghCirclesMinDist = 20.0;
+  static const int houghCirclesParam1 = 50;
+  static const int houghCirclesParam2 = 30;
+
+  // Scoring zones for concentric targets (10 zones, from center)
+  static const List<double> concentricZoneRadii = [
+    0.05, // Zone 10 (bullseye)
+    0.10, // Zone 9
+    0.15, // Zone 8
+    0.20, // Zone 7
+    0.25, // Zone 6
+    0.30, // Zone 5
+    0.40, // Zone 4
+    0.50, // Zone 3
+    0.65, // Zone 2
+    0.80, // Zone 1
+  ];
+
+  // Silhouette scoring zones (as percentage of height from top)
+  static const Map<String, double> silhouetteZones = {
+    'head': 0.15,      // Top 15% = head = 5 points
+    'center': 0.45,    // 15-45% = center mass = 5 points
+    'body': 0.70,      // 45-70% = body = 4 points
+    'lower': 1.0,      // 70-100% = lower = 3 points
+  };
+
+  // UI
+  static const double defaultPadding = 16.0;
+  static const double smallPadding = 8.0;
+  static const double largePadding = 24.0;
+  static const double borderRadius = 12.0;
+}

lib/core/theme/app_theme.dart

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+import 'package:flutter/material.dart';
+
+class AppTheme {
+  AppTheme._();
+
+  static const Color primaryColor = Color(0xFF1E88E5);
+  static const Color secondaryColor = Color(0xFF43A047);
+  static const Color errorColor = Color(0xFFE53935);
+  static const Color warningColor = Color(0xFFFFA726);
+  static const Color successColor = Color(0xFF66BB6A);
+
+  static const Color backgroundColor = Color(0xFFF5F5F5);
+  static const Color surfaceColor = Colors.white;
+  static const Color textPrimary = Color(0xFF212121);
+  static const Color textSecondary = Color(0xFF757575);
+
+  // Impact colors for visualization
+  static const Color impactColor = Color(0xFFFF5722);
+  static const Color impactOutlineColor = Color(0xFFFFFFFF);
+  static const Color groupingCenterColor = Color(0xFF2196F3);
+  static const Color groupingCircleColor = Color(0x4D2196F3);
+
+  // Score zone colors
+  static const List<Color> zoneColors = [
+    Color(0xFFFFEB3B), // Zone 10 - Gold
+    Color(0xFFFFEB3B), // Zone 9
+    Color(0xFFFF5722), // Zone 8
+    Color(0xFFFF5722), // Zone 7
+    Color(0xFF2196F3), // Zone 6
+    Color(0xFF2196F3), // Zone 5
+    Color(0xFF4CAF50), // Zone 4
+    Color(0xFF4CAF50), // Zone 3
+    Color(0xFFFFFFFF), // Zone 2
+    Color(0xFFFFFFFF), // Zone 1
+  ];
+
+  static ThemeData get lightTheme {
+    return ThemeData(
+      useMaterial3: true,
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: primaryColor,
+        brightness: Brightness.light,
+      ),
+      scaffoldBackgroundColor: backgroundColor,
+      appBarTheme: const AppBarTheme(
+        elevation: 0,
+        centerTitle: true,
+        backgroundColor: primaryColor,
+        foregroundColor: Colors.white,
+      ),
+      cardTheme: CardThemeData(
+        elevation: 2,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(12),
+        ),
+      ),
+      elevatedButtonTheme: ElevatedButtonThemeData(
+        style: ElevatedButton.styleFrom(
+          padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 12),
+          shape: RoundedRectangleBorder(
+            borderRadius: BorderRadius.circular(8),
+          ),
+        ),
+      ),
+      floatingActionButtonTheme: const FloatingActionButtonThemeData(
+        backgroundColor: primaryColor,
+        foregroundColor: Colors.white,
+      ),
+    );
+  }
+
+  static ThemeData get darkTheme {
+    return ThemeData(
+      useMaterial3: true,
+      colorScheme: ColorScheme.fromSeed(
+        seedColor: primaryColor,
+        brightness: Brightness.dark,
+      ),
+      appBarTheme: const AppBarTheme(
+        elevation: 0,
+        centerTitle: true,
+      ),
+      cardTheme: CardThemeData(
+        elevation: 2,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(12),
+        ),
+      ),
+    );
+  }
+}