Update version to 0.4.9, enhance README with Trendshift badge, and add new embedding models to providerModels.js. Refactor TTS handling to support additional providers and improve API key validation for media providers.

src/mitm/config.js

@@ -15,6 +15,11 @@ const URL_PATTERNS = {
   cursor: ["/BidiAppend", "/RunSSE", "/RunPoll", "/Run"],
 };
 
+// Synonym map: rawModel from request → canonical alias key in mitmAlias DB
+const MODEL_SYNONYMS = {
+  antigravity: { "gemini-default": "gemini-3-flash" },
+};
+
 function getToolForHost(host) {
   const h = (host || "").split(":")[0];
   if (h === "api.individual.githubcopilot.com") return "copilot";
@@ -24,4 +29,4 @@ function getToolForHost(host) {
   return null;
 }
 
-module.exports = { TARGET_HOSTS, URL_PATTERNS, getToolForHost };
+module.exports = { TARGET_HOSTS, URL_PATTERNS, MODEL_SYNONYMS, getToolForHost };