Refactor UI to use JavaScript instead of HTMX

- Replace HTMX with plain JavaScript for tab management
- Consolidate tab UI into single button like profiles
- Add cookie-based current tab storage (client-side)
- Update profiles.js to work with new JSON response format

.gitignore

@@ -0,0 +1,29 @@
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+
+# Virtual environments
+venv/
+env/
+ENV/
+.venv
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Project specific
+*.log
+*.db
+*.sqlite
+