fix: improve gitignore security patterns and clean root tsconfig

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -3,3 +3,7 @@ dist
 .understand-anything
 *.tsbuildinfo
 .DS_Store
+.env
+.env.*
+coverage/
+*.log

tsconfig.json

@@ -11,8 +11,6 @@
     "resolveJsonModule": true,
     "declaration": true,
     "declarationMap": true,
-    "sourceMap": true,
-    "outDir": "dist",
-    "rootDir": "src"
+    "sourceMap": true
   }
 }