Refactor configuration and security features for improved development experience

- Updated the .env.example file to reflect a development environment setup with enhanced secret key requirements and local host settings.
- Modified the Docker Compose configuration to enhance security with read-only settings and no-new-privileges options.
- Updated requirements.txt to pin package versions for better dependency management.
- Enhanced the FastAPI application to include dynamic OpenAPI and documentation URLs based on the environment.
- Implemented session versioning in JWT tokens to improve security and user session management.
- Added new validation for user roles and password strength in schemas.
- Improved email sending logic to handle recipient lists more robustly and added logging for SMTP operations.
- Updated dashboard and profile templates to reflect new features and improve user experience.

app/static/css/main.css

@@ -740,6 +740,21 @@ body.login-page .container {
     user-select: none;
 }
 
+.inline-form {
+    display: inline;
+    margin: 0;
+}
+
+.inline-form select,
+.inline-form button {
+    font-size: 0.85rem;
+}
+
+.btn-small {
+    padding: 0.35rem 0.65rem;
+    font-size: 0.82rem;
+}
+
 /* ── Footer ── */
 .site-footer {
     text-align: center;