Modernize codebase

src/utils/costEstimator.ts

@@ -37,31 +37,29 @@ export async function estimateCost(
   console.log(`Will process ${totalUnits} ${unitType}`);
 
   // Pricing constants (as of March 2025, update as needed)
-  const pricing = {
-    // Get pricing based on vision provider
+  const pricing: {
+    vision: Record<string, Record<string, { input: number; output: number }>>;
+    tts: Record<string, Record<string, number>>;
+  } = {
     vision: {
       openai: {
         'gpt-4o': {
-          input: 0.0025,  // per 1K input tokens
-          output: 0.01    // per 1K output tokens
+          input: 0.0025,
+          output: 0.01
         }
-        // Add other OpenAI models here
       },
       gemini: {
         'gemini-pro-vision': {
-          input: 0.0025,  // per 1K input tokens
-          output: 0.0025   // per 1K output tokens
+          input: 0.0025,
+          output: 0.0025
         }
       }
-      // Add other vision providers here
     },
-    // Get pricing based on TTS provider
     tts: {
       openai: {
-        'tts-1': 0.015,      // per 1K characters
-        'tts-1-hd': 0.030    // per 1K characters
+        'tts-1': 0.015,
+        'tts-1-hd': 0.030
       }
-      // Add other TTS providers here
     }
   };