fix: improve API response parsing with detailed logging

Problem:
- Gray screens on movie details and downloads
- No error messages shown to debug issues
- API response structure not fully validated

Solution:

1. Enhanced Movie.fromJson() parsing:
   - Added detailed logging for each parsing step
   - Safe genre parsing: handles [{id: 18, name: Drama}]
   - Safe date parsing with null checks
   - Safe runtime parsing for both movies and TV shows
   - Better media type detection (movie vs tv)
   - Comprehensive error logging with stack traces

2. Added detailed API logging:
   - getMovieById(): Log request URL, response status, body preview
   - getTvShowById(): Log request URL, response status, body preview
   - Log API response structure (keys, types, unwrapped data)
   - Makes debugging much easier

3. Based on backend API structure:
   Backend returns: {"success": true, "data": {...}}
   Movie fields from TMDB:
   - id (number)
   - title or name (string)
   - genres: [{"id": int, "name": string}]
   - release_date or first_air_date (string)
   - vote_average (number)
   - runtime or episode_run_time (number/array)
   - number_of_seasons, number_of_episodes (int, optional)

Logging examples:
- 'Parsing Movie from JSON: [id, title, genres, ...]'
- 'Parsed genres: [Drama, Thriller, Mystery]'
- 'Successfully parsed movie: Fight Club'
- 'Response status: 200'
- 'Movie data keys: [id, title, overview, ...]'

Changes:
- lib/data/models/movie.dart: Complete rewrite with safe parsing
- lib/data/api/neomovies_api_client.dart: Add detailed logging

Result:
✅ Safer JSON parsing with null checks
✅ Detailed error logging for debugging
✅ Handles all edge cases from API
✅ Easy to debug gray screen issues via logs

Next steps:
Test the app and check Flutter debug console for:
- API request URLs
- Response bodies
- Parsing errors (if any)
- Successful movie loading messages

lib/data/api/neomovies_api_client.dart

@@ -186,17 +186,28 @@ class NeoMoviesApiClient {
   /// Get movie by ID
   Future<Movie> getMovieById(String id) async {
     final uri = Uri.parse('$apiUrl/movies/$id');
+    print('Fetching movie from: $uri');
     final response = await _client.get(uri);
 
+    print('Response status: ${response.statusCode}');
+    print('Response body: ${response.body.substring(0, response.body.length > 500 ? 500 : response.body.length)}...');
+
     if (response.statusCode == 200) {
       final apiResponse = json.decode(response.body);
+      print('Decoded API response type: ${apiResponse.runtimeType}');
+      print('API response keys: ${apiResponse is Map ? apiResponse.keys.toList() : 'Not a map'}');
+      
       // API returns: {"success": true, "data": {...}}
       final movieData = (apiResponse is Map && apiResponse['data'] != null) 
           ? apiResponse['data'] 
           : apiResponse;
+      
+      print('Movie data keys: ${movieData is Map ? movieData.keys.toList() : 'Not a map'}');
+      print('Movie data: $movieData');
+      
       return Movie.fromJson(movieData);
     } else {
-      throw Exception('Failed to load movie: ${response.statusCode}');
+      throw Exception('Failed to load movie: ${response.statusCode} - ${response.body}');
     }
   }
 
@@ -227,17 +238,28 @@ class NeoMoviesApiClient {
   /// Get TV show by ID
   Future<Movie> getTvShowById(String id) async {
     final uri = Uri.parse('$apiUrl/tv/$id');
+    print('Fetching TV show from: $uri');
     final response = await _client.get(uri);
 
+    print('Response status: ${response.statusCode}');
+    print('Response body: ${response.body.substring(0, response.body.length > 500 ? 500 : response.body.length)}...');
+
     if (response.statusCode == 200) {
       final apiResponse = json.decode(response.body);
+      print('Decoded API response type: ${apiResponse.runtimeType}');
+      print('API response keys: ${apiResponse is Map ? apiResponse.keys.toList() : 'Not a map'}');
+      
       // API returns: {"success": true, "data": {...}}
       final tvData = (apiResponse is Map && apiResponse['data'] != null) 
           ? apiResponse['data'] 
           : apiResponse;
+      
+      print('TV data keys: ${tvData is Map ? tvData.keys.toList() : 'Not a map'}');
+      print('TV data: $tvData');
+      
       return Movie.fromJson(tvData);
     } else {
-      throw Exception('Failed to load TV show: ${response.statusCode}');
+      throw Exception('Failed to load TV show: ${response.statusCode} - ${response.body}');
     }
   }