Create config.py

config.py

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+from dataclasses import dataclass
+from typing import Dict
+
+@dataclass
+class Config:
+    MAX_HISTORY_SIZE: int = 1000
+    BATCH_SIZE_LIMIT: int = 50
+    MAX_TEXT_LENGTH: int = 512
+    MIN_WORD_LENGTH: int = 2
+    CACHE_SIZE: int = 128
+    BATCH_PROCESSING_SIZE: int = 8
+    MODEL_CACHE_SIZE: int = 2  # Maximum models to keep in memory
+    
+    # Supported languages and models
+    SUPPORTED_LANGUAGES = {
+        'auto': 'Auto Detect',
+        'en': 'English',
+        'zh': 'Chinese',
+        'es': 'Spanish',
+        'fr': 'French',
+        'de': 'German',
+        'sv': 'Swedish'
+    }
+    
+    MODELS = {
+        'en': "cardiffnlp/twitter-roberta-base-sentiment-latest",
+        'multilingual': "cardiffnlp/twitter-xlm-roberta-base-sentiment",
+        'zh': "uer/roberta-base-finetuned-dianping-chinese"
+    }
+    
+    # Color themes for Plotly
+    THEMES = {
+        'default': {'pos': '#4CAF50', 'neg': '#F44336', 'neu': '#FF9800'},
+        'ocean': {'pos': '#0077BE', 'neg': '#FF6B35', 'neu': '#00BCD4'},
+        'dark': {'pos': '#66BB6A', 'neg': '#EF5350', 'neu': '#FFA726'},
+        'rainbow': {'pos': '#9C27B0', 'neg': '#E91E63', 'neu': '#FF5722'}
+    }
+
+config = Config()