feat: enhance profile card with animations matching React component

- Add animated EXP progress bar (0% → 65% with ease-out on gray track)
- Add animated stat counters (count up from 0 to 72.9K/828/342.9K)
- Expand rainbow gradient to 6 colors (purple→pink→orange→yellow→green→blue)
- Add Follow/Following toggle button on cover banner
- Add title/bio text between name and email
- Add top/bottom borders to stats section
- Add _formatNumber() helper for K/M formatting

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/screens/profile_screen.dart

@@ -19,7 +19,8 @@ class ProfileScreen extends StatefulWidget {
   State<ProfileScreen> createState() => _ProfileScreenState();
 }
 
-class _ProfileScreenState extends State<ProfileScreen> {
+class _ProfileScreenState extends State<ProfileScreen>
+    with SingleTickerProviderStateMixin {
   String _username = '';
   String _email = 'not provided';
   String _profileImage = '';
@@ -33,15 +34,96 @@ class _ProfileScreenState extends State<ProfileScreen> {
 
   bool _loadingEvents = true;
 
-  // Gradient used for EXP bar and rainbow bar
+  // Gradient used for EXP bar and rainbow bar (6-color rainbow)
   static const LinearGradient _expGradient = LinearGradient(
-    colors: [Color(0xFFA855F7), Color(0xFFEAB308), Color(0xFF3B82F6)],
+    colors: [
+      Color(0xFFA855F7), // purple-500
+      Color(0xFFEC4899), // pink-500
+      Color(0xFFF97316), // orange-500
+      Color(0xFFEAB308), // yellow-500
+      Color(0xFF22C55E), // green-500
+      Color(0xFF3B82F6), // blue-500
+    ],
   );
 
+  // Animation state
+  late AnimationController _animController;
+  double _expProgress = 0.0;
+  int _animatedLikes = 0;
+  int _animatedPosts = 0;
+  int _animatedViews = 0;
+  bool _isFollowing = false;
+  String _title = 'Product Designer who focuses on simplicity & usability.';
+
+  // Target stat values
+  static const int _targetLikes = 72900;
+  static const int _targetPosts = 828;
+  static const int _targetViews = 342900;
+
   @override
   void initState() {
     super.initState();
+
+    // Animation controller for EXP bar + stat counters
+    _animController = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 2000),
+    );
+
     _loadProfile();
+    _startAnimations();
+  }
+
+  @override
+  void dispose() {
+    _animController.dispose();
+    super.dispose();
+  }
+
+  void _startAnimations() {
+    // Delay to match React's setTimeout(500ms)
+    Future.delayed(const Duration(milliseconds: 500), () {
+      if (!mounted) return;
+
+      // Animate EXP bar: 0 → 0.65 with ease-out over 1.3s
+      final expTween = Tween<double>(begin: 0.0, end: 0.65);
+      final expAnim = CurvedAnimation(
+        parent: _animController,
+        curve: const Interval(0.0, 0.65, curve: Curves.easeOut),
+      );
+      expAnim.addListener(() {
+        if (mounted) {
+          setState(() {
+            _expProgress = expTween.evaluate(expAnim);
+          });
+        }
+      });
+
+      // Animate stat counters: 0 → target over full 2s
+      _animController.addListener(() {
+        if (!mounted) return;
+        final t = _animController.value;
+        setState(() {
+          _animatedLikes = (t * _targetLikes).round();
+          _animatedPosts = (t * _targetPosts).round();
+          _animatedViews = (t * _targetViews).round();
+        });
+      });
+
+      _animController.forward();
+    });
+  }
+
+  /// Format large numbers: ≥1M → "X.XM", ≥1K → "X.XK", else raw
+  String _formatNumber(int n) {
+    if (n >= 1000000) {
+      final val = n / 1000000;
+      return '${val.toStringAsFixed(1)}M';
+    } else if (n >= 1000) {
+      final val = n / 1000;
+      return '${val.toStringAsFixed(1)}K';
+    }
+    return n.toString();
   }
 
   // ───────── Data Loading (unchanged) ─────────
@@ -585,20 +667,36 @@ class _ProfileScreenState extends State<ProfileScreen> {
             ),
           ),
         ),
-        // Edit pencil button (top-right)
+        // Follow / Following toggle button (top-right)
         Positioned(
           top: 8,
           right: 8,
           child: GestureDetector(
-            onTap: () => _openEditDialog(),
+            onTap: () => setState(() => _isFollowing = !_isFollowing),
-            child: Container(
+            child: AnimatedContainer(
-              width: 36,
+              duration: const Duration(milliseconds: 200),
-              height: 36,
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
               decoration: BoxDecoration(
-                color: Colors.white.withValues(alpha: 0.15),
+                color: _isFollowing ? Colors.white : Colors.white,
-                borderRadius: BorderRadius.circular(8),
+                borderRadius: BorderRadius.circular(20),
+                boxShadow: [
+                  BoxShadow(
+                    color: Colors.black.withValues(alpha: 0.1),
+                    blurRadius: 4,
+                    offset: const Offset(0, 2),
+                  ),
+                ],
+              ),
+              child: Text(
+                _isFollowing ? 'Following \u2713' : 'Follow +',
+                style: TextStyle(
+                  fontSize: 13,
+                  fontWeight: FontWeight.w600,
+                  color: _isFollowing
+                      ? AppConstants.textSecondary
+                      : AppConstants.textPrimary,
+                ),
               ),
-              child: const Icon(Icons.edit, color: Colors.white, size: 18),
             ),
           ),
         ),
@@ -641,7 +739,7 @@ class _ProfileScreenState extends State<ProfileScreen> {
     );
   }
 
-  // ───────── EXP Progress Bar ─────────
+  // ───────── Animated EXP Progress Bar ─────────
 
   Widget _buildExpBar() {
     return Padding(
@@ -658,7 +756,20 @@ class _ProfileScreenState extends State<ProfileScreen> {
           ),
           const SizedBox(width: 8),
           Expanded(
+            child: LayoutBuilder(
+              builder: (context, constraints) {
+                final fullWidth = constraints.maxWidth;
+                final filledWidth = fullWidth * _expProgress;
+                return Container(
+                  height: 8,
+                  decoration: BoxDecoration(
+                    borderRadius: BorderRadius.circular(4),
+                    color: Colors.grey.shade200, // gray track
+                  ),
+                  child: Align(
+                    alignment: Alignment.centerLeft,
                     child: Container(
+                      width: filledWidth,
                       height: 8,
                       decoration: BoxDecoration(
                         borderRadius: BorderRadius.circular(4),
@@ -666,12 +777,16 @@ class _ProfileScreenState extends State<ProfileScreen> {
                       ),
                     ),
                   ),
+                );
+              },
+            ),
+          ),
         ],
       ),
     );
   }
 
-  // ───────── Stats Row ─────────
+  // ───────── Stats Row (animated counters + top/bottom borders) ─────────
 
   Widget _buildStatsRow() {
     Widget statColumn(String value, String label) {
@@ -701,16 +816,23 @@ class _ProfileScreenState extends State<ProfileScreen> {
       );
     }
 
-    return Padding(
+    return Container(
-      padding: const EdgeInsets.symmetric(horizontal: 8),
+      margin: const EdgeInsets.symmetric(horizontal: 8),
+      padding: const EdgeInsets.symmetric(vertical: 16),
+      decoration: BoxDecoration(
+        border: Border(
+          top: BorderSide(color: Colors.grey.shade200, width: 1),
+          bottom: BorderSide(color: Colors.grey.shade200, width: 1),
+        ),
+      ),
       child: IntrinsicHeight(
         child: Row(
           children: [
-            statColumn('1.2K', 'Likes'),
+            statColumn(_formatNumber(_animatedLikes), 'Likes'),
             VerticalDivider(color: Colors.grey.shade200, thickness: 1, width: 1),
-            statColumn('45', 'Posts'),
+            statColumn(_formatNumber(_animatedPosts), 'Posts'),
             VerticalDivider(color: Colors.grey.shade200, thickness: 1, width: 1),
-            statColumn('3.4K', 'Views'),
+            statColumn(_formatNumber(_animatedViews), 'Views'),
           ],
         ),
       ),
@@ -795,6 +917,21 @@ class _ProfileScreenState extends State<ProfileScreen> {
               ),
             ),
           ),
+          const SizedBox(height: 6),
+
+          // Title / Bio
+          Padding(
+            padding: const EdgeInsets.symmetric(horizontal: 16),
+            child: Text(
+              _title,
+              style: const TextStyle(
+                fontSize: 14,
+                fontWeight: FontWeight.w300,
+                color: AppConstants.textSecondary,
+                height: 1.5,
+              ),
+            ),
+          ),
           const SizedBox(height: 4),
 
           // Email
@@ -802,10 +939,10 @@ class _ProfileScreenState extends State<ProfileScreen> {
             padding: const EdgeInsets.symmetric(horizontal: 16),
             child: Text(
               _email,
-              style: const TextStyle(
+              style: TextStyle(
-                fontSize: 14,
+                fontSize: 13,
                 fontWeight: FontWeight.w300,
-                color: AppConstants.textSecondary,
+                color: Colors.grey.shade400,
               ),
             ),
           ),