refactor(config): improve jwt config flexibility with fallback values

Add fallback environment variables for JWT configuration to maintain compatibility with UMS while preferring AMS-specific values. This makes the configuration more resilient when migrating between systems.

app/core/config.py

@@ -68,9 +68,12 @@ class Settings:
     APPOINTMENTS_KEY_PREFIX: str = os.getenv("APPOINTMENTS_KEY_PREFIX", "appointments")
     
     # JWT settings
-    JWT_SECRET_KEY: str = os.getenv("JWT_SECRET_KEY")
-    JWT_ALGORITHM: str = os.getenv("JWT_ALGORITHM", "HS256")
-    JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = int(os.getenv("JWT_ACCESS_TOKEN_EXPIRE_MINUTES", "30"))
+    # Prefer AMS-specific envs; gracefully fall back to UMS-compatible names
+    JWT_SECRET_KEY: str = os.getenv("JWT_SECRET_KEY") or os.getenv("SECRET_KEY")
+    JWT_ALGORITHM: str = os.getenv("JWT_ALGORITHM") or os.getenv("ALGORITHM", "HS256")
+    JWT_ACCESS_TOKEN_EXPIRE_MINUTES: int = int(
+        os.getenv("JWT_ACCESS_TOKEN_EXPIRE_MINUTES", os.getenv("ACCESS_TOKEN_EXPIRE_MINUTES", "30"))
+    )
     
     # Security settings
     # Include Hugging Face Spaces by default to avoid 400s behind their proxy.