[bug] Avoid deleting endpoint port when running on Replit (#3447)

* "if codespace_name" repeated, no-op

* Special-case replit.dev

* Codifying a ruff future

CONTRIBUTING.md

@@ -80,13 +80,13 @@ poetry run pyright reflex tests
 find reflex tests -name "*.py" -not -path reflex/reflex.py | xargs poetry run darglint
 ```
 
-Finally, run `black` to format your code.
+Finally, run `ruff` to format your code.
 
 ``` bash
-poetry run black reflex tests
+poetry run ruff format .
 ```
 
-Consider installing git pre-commit hooks so Ruff, Pyright, Darglint and Black will run automatically before each commit.
+Consider installing git pre-commit hooks so Ruff, Pyright, Darglint and `make_pyi` will run automatically before each commit.
 Note that pre-commit will only be installed when you use a Python version >= 3.8.
 
 ``` bash

reflex/config.py

@@ -316,17 +316,22 @@ class Config(Base):
         ):
             self.deploy_url = f"http://localhost:{kwargs['frontend_port']}"
 
-        # If running in Github Codespaces, override API_URL
-        codespace_name = os.getenv("CODESPACE_NAME")
-        if "api_url" not in self._non_default_attributes and codespace_name:
+        if "api_url" not in self._non_default_attributes:
+            # If running in Github Codespaces, override API_URL
+            codespace_name = os.getenv("CODESPACE_NAME")
             GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN = os.getenv(
                 "GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN"
             )
-            if codespace_name:
+            # If running on Replit.com interactively, override API_URL to ensure we maintain the backend_port
+            replit_dev_domain = os.getenv("REPLIT_DEV_DOMAIN")
+            backend_port = kwargs.get("backend_port", self.backend_port)
+            if codespace_name and GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN:
                 self.api_url = (
                     f"https://{codespace_name}-{kwargs.get('backend_port', self.backend_port)}"
                     f".{GITHUB_CODESPACES_PORT_FORWARDING_DOMAIN}"
                 )
+            elif replit_dev_domain and backend_port:
+                self.api_url = f"https://{replit_dev_domain}:{backend_port}"
 
     def _set_persistent(self, **kwargs):
         """Set values in this config and in the environment so they persist into subprocess.