chore: fix .gitignore content

.gitignore

@@ -0,0 +1,37 @@
+@"
+# Build outputs
+build/bin/
+frontend/dist/
+
+# Frontend dependencies
+frontend/node_modules/
+frontend/.vite/
+
+# Wails generated bindings
+frontend/wailsjs/
+
+# Go build cache
+*.exe
+*.test
+*.out
+
+# TLE cache
+satmaster_tle_cache.txt
+
+# OS & editor
+.DS_Store
+Thumbs.db
+desktop.ini
+.idea/
+.vscode/
+*.swp
+*~
+
+# Misc
+tree
+frontend/package.json.md5
+"@ | Set-Content .gitignore -Encoding UTF8
+
+git add .gitignore
+git commit -m "chore: fix .gitignore content"
+git push