feat: added audio track spectrogram visualization feature

package-lock.json

@@ -1,15 +1,16 @@
 {
   "name": "K.G.Studio",
-  "version": "0.10.0-build.20260411",
+  "version": "0.12.0-build.20260430",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "K.G.Studio",
-      "version": "0.10.0-build.20260411",
+      "version": "0.12.0-build.20260430",
       "dependencies": {
         "@breezystack/lamejs": "^1.2.7",
         "class-transformer": "^0.5.1",
+        "fft.js": "^4.0.4",
         "idb": "^8.0.3",
         "jszip": "^3.10.1",
         "openai": "^6.33.0",
@@ -4691,6 +4692,12 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/fft.js": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/fft.js/-/fft.js-4.0.4.tgz",
+      "integrity": "sha512-f9c00hphOgeQTlDyavwTtu6RiK8AIFjD6+jvXkNkpeQ7rirK3uFWVpalkoS4LAwbdX7mfZ8aoBfFVQX1Re/8aw==",
+      "license": "MIT"
+    },
     "node_modules/figures": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/figures/-/figures-5.0.0.tgz",